diff --git a/draw/migrations/0005_alter_round_number_alter_teamdraw_accepted_and_more.py b/draw/migrations/0005_alter_round_number_alter_teamdraw_accepted_and_more.py
new file mode 100644
index 0000000..d044feb
--- /dev/null
+++ b/draw/migrations/0005_alter_round_number_alter_teamdraw_accepted_and_more.py
@@ -0,0 +1,69 @@
+# Generated by Django 5.0.6 on 2024-06-13 08:53
+
+import django.core.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("draw", "0004_alter_round_number"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="round",
+            name="number",
+            field=models.PositiveSmallIntegerField(
+                choices=[(1, "Round 1"), (2, "Round 2"), (3, "Round 3")],
+                help_text="The number of the round, 1 or 2 (or 3 for ETEAM)",
+                validators=[
+                    django.core.validators.MinValueValidator(1),
+                    django.core.validators.MaxValueValidator(3),
+                ],
+                verbose_name="number",
+            ),
+        ),
+        migrations.AlterField(
+            model_name="teamdraw",
+            name="accepted",
+            field=models.PositiveSmallIntegerField(
+                choices=[
+                    (1, "Problem #1"),
+                    (2, "Problem #2"),
+                    (3, "Problem #3"),
+                    (4, "Problem #4"),
+                    (5, "Problem #5"),
+                    (6, "Problem #6"),
+                    (7, "Problem #7"),
+                    (8, "Problem #8"),
+                    (9, "Problem #9"),
+                    (10, "Problem #10"),
+                ],
+                default=None,
+                null=True,
+                verbose_name="accepted problem",
+            ),
+        ),
+        migrations.AlterField(
+            model_name="teamdraw",
+            name="purposed",
+            field=models.PositiveSmallIntegerField(
+                choices=[
+                    (1, "Problem #1"),
+                    (2, "Problem #2"),
+                    (3, "Problem #3"),
+                    (4, "Problem #4"),
+                    (5, "Problem #5"),
+                    (6, "Problem #6"),
+                    (7, "Problem #7"),
+                    (8, "Problem #8"),
+                    (9, "Problem #9"),
+                    (10, "Problem #10"),
+                ],
+                default=None,
+                null=True,
+                verbose_name="purposed problem",
+            ),
+        ),
+    ]
diff --git a/draw/models.py b/draw/models.py
index deb38c2..0e9ec0e 100644
--- a/draw/models.py
+++ b/draw/models.py
@@ -193,7 +193,7 @@ class Round(models.Model):
         choices=[
             (1, _('Round 1')),
             (2, _('Round 2')),
-        ] + ([] if settings.NB_ROUNDS == 2 else [(3, _('Round 3'))]),
+            (3, _('Round 3'))],
         verbose_name=_('number'),
         help_text=_("The number of the round, 1 or 2 (or 3 for ETEAM)"),
         validators=[MinValueValidator(1), MaxValueValidator(settings.NB_ROUNDS)],
diff --git a/locale/fr/LC_MESSAGES/django.po b/locale/fr/LC_MESSAGES/django.po
index ce470f3..c55d813 100644
--- a/locale/fr/LC_MESSAGES/django.po
+++ b/locale/fr/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: TFJM\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2024-06-08 00:37+0200\n"
+"POT-Creation-Date: 2024-06-13 10:56+0200\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: Emmy D'Anello <emmy.danello@animath.fr>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -37,7 +37,7 @@ msgstr "Canaux d'équipes"
 msgid "Private channels"
 msgstr "Messages privés"
 
-#: chat/models.py:29 participation/models.py:36 participation/models.py:266
+#: chat/models.py:29 participation/models.py:36 participation/models.py:272
 #: participation/tables.py:18 participation/tables.py:34
 msgid "name"
 msgstr "nom"
@@ -78,8 +78,8 @@ msgstr "Type de permission nécessaire pour écrire un message dans un canal."
 
 #: chat/models.py:62 draw/admin.py:53 draw/admin.py:71 draw/admin.py:88
 #: draw/models.py:26 participation/admin.py:79 participation/admin.py:140
-#: participation/admin.py:171 participation/models.py:721
-#: participation/models.py:745 participation/models.py:1006
+#: participation/admin.py:171 participation/models.py:727
+#: participation/models.py:751 participation/models.py:1012
 #: registration/models.py:763
 #: registration/templates/registration/payment_form.html:53
 msgid "tournament"
@@ -95,7 +95,7 @@ msgstr ""
 
 #: chat/models.py:73 draw/models.py:429 draw/models.py:456
 #: participation/admin.py:136 participation/admin.py:155
-#: participation/models.py:1509 participation/models.py:1518
+#: participation/models.py:1515 participation/models.py:1524
 #: participation/tables.py:84
 msgid "pool"
 msgstr "poule"
@@ -108,8 +108,8 @@ msgstr ""
 "concernée."
 
 #: chat/models.py:84 draw/templates/draw/tournament_content.html:277
-#: participation/admin.py:167 participation/models.py:255
-#: participation/models.py:736
+#: participation/admin.py:167 participation/models.py:261
+#: participation/models.py:742
 #: participation/templates/participation/tournament_harmonize.html:15
 #: registration/models.py:158 registration/models.py:754
 #: registration/tables.py:39
@@ -259,13 +259,13 @@ msgid "Log in"
 msgstr "Connexion"
 
 #: draw/admin.py:39 draw/admin.py:57 draw/admin.py:75
-#: participation/admin.py:109 participation/models.py:256
+#: participation/admin.py:109 participation/models.py:262
 #: participation/tables.py:88
 msgid "teams"
 msgstr "équipes"
 
 #: draw/admin.py:92 draw/models.py:234 draw/models.py:448
-#: participation/models.py:1010
+#: participation/models.py:1016
 msgid "round"
 msgstr "tour"
 
@@ -407,7 +407,7 @@ msgstr "La poule en cours, où les équipes choisissent leurs problèmes"
 msgid "rounds"
 msgstr "tours"
 
-#: draw/models.py:257 participation/models.py:1018
+#: draw/models.py:257 participation/models.py:1024
 msgid "letter"
 msgstr "lettre"
 
@@ -445,12 +445,12 @@ msgstr "L'instance complète de la poule."
 msgid "Pool {letter}{number}"
 msgstr "Poule {letter}{number}"
 
-#: draw/models.py:430 participation/models.py:1510
+#: draw/models.py:430 participation/models.py:1516
 msgid "pools"
 msgstr "poules"
 
-#: draw/models.py:442 participation/models.py:996 participation/models.py:1659
-#: participation/models.py:1689 participation/models.py:1731
+#: draw/models.py:442 participation/models.py:1002 participation/models.py:1665
+#: participation/models.py:1695 participation/models.py:1737
 msgid "participation"
 msgstr "participation"
 
@@ -474,8 +474,8 @@ msgid ""
 msgstr ""
 "L'ordre de choix dans la poule, entre 0 et la taille de la poule moins 1."
 
-#: draw/models.py:479 draw/models.py:502 participation/models.py:1532
-#: participation/models.py:1696
+#: draw/models.py:479 draw/models.py:502 participation/models.py:1538
+#: participation/models.py:1702
 #, python-brace-format
 msgid "Problem #{problem}"
 msgstr "Problème n°{problem}"
@@ -686,26 +686,26 @@ msgstr "Changelog de type \"{action}\" pour le modèle {model} le {timestamp}"
 msgid "valid"
 msgstr "valide"
 
-#: participation/admin.py:87 participation/models.py:757
+#: participation/admin.py:87 participation/models.py:763
 msgid "selected for final"
 msgstr "sélectionnée pour la finale"
 
 #: participation/admin.py:124 participation/admin.py:183
-#: participation/models.py:1539 participation/tables.py:112
+#: participation/models.py:1545 participation/tables.py:112
 msgid "defender"
 msgstr "défenseur⋅se"
 
-#: participation/admin.py:128 participation/models.py:1546
-#: participation/models.py:1743
+#: participation/admin.py:128 participation/models.py:1552
+#: participation/models.py:1749
 msgid "opponent"
 msgstr "opposant⋅e"
 
-#: participation/admin.py:132 participation/models.py:1553
-#: participation/models.py:1744
+#: participation/admin.py:132 participation/models.py:1559
+#: participation/models.py:1750
 msgid "reporter"
 msgstr "rapporteur⋅rice"
 
-#: participation/admin.py:187 participation/models.py:1694
+#: participation/admin.py:187 participation/models.py:1700
 msgid "problem"
 msgstr "numéro de problème"
 
@@ -952,134 +952,139 @@ msgstr ""
 msgid "Pending validation"
 msgstr "Validation en attente"
 
-#: participation/models.py:252
+#: participation/models.py:241
+#, python-brace-format
+msgid "The team code must be composed of {nb_letters} uppercase letters."
+msgstr "Le code d'équipe doit être composé de {nb_letters} lettres majuscules."
+
+#: participation/models.py:258
 #, python-brace-format
 msgid "Team {name} ({trigram})"
 msgstr "Équipe {name} ({trigram})"
 
-#: participation/models.py:271
+#: participation/models.py:277
 msgid "start"
 msgstr "début"
 
-#: participation/models.py:276
+#: participation/models.py:282
 msgid "end"
 msgstr "fin"
 
-#: participation/models.py:282
+#: participation/models.py:288
 #: participation/templates/participation/tournament_detail.html:18
 msgid "place"
 msgstr "lieu"
 
-#: participation/models.py:286
+#: participation/models.py:292
 msgid "max team count"
 msgstr "nombre maximal d'équipes"
 
-#: participation/models.py:291
+#: participation/models.py:297
 #: participation/templates/participation/tournament_detail.html:22
 msgid "price"
 msgstr "prix"
 
-#: participation/models.py:296
+#: participation/models.py:302
 #: participation/templates/participation/tournament_detail.html:26
 msgid "remote"
 msgstr "à distance"
 
-#: participation/models.py:301
+#: participation/models.py:307
 msgid "limit date for registrations"
 msgstr "date limite d'inscription"
 
-#: participation/models.py:306
+#: participation/models.py:312
 msgid "limit date to upload solutions"
 msgstr "date limite pour envoyer les solutions"
 
-#: participation/models.py:311
+#: participation/models.py:317
 msgid "random draw for solutions"
 msgstr "tirage au sort des solutions"
 
-#: participation/models.py:316
+#: participation/models.py:322
 msgid "first phase date"
 msgstr "date du premier tour"
 
-#: participation/models.py:321
+#: participation/models.py:327
 msgid "limit date to upload the syntheses for the first phase"
 msgstr "date limite pour envoyer les notes de synthèses pour la première phase"
 
-#: participation/models.py:326
+#: participation/models.py:332
 msgid "first second date"
 msgstr "date du second tour"
 
-#: participation/models.py:331
+#: participation/models.py:337
 msgid "check this case when solutions for the second round become available"
 msgstr ""
 "cocher la case lorsque les solutions pour le second tour sont accessibles"
 
-#: participation/models.py:336
+#: participation/models.py:342
 msgid "limit date to upload the syntheses for the second phase"
 msgstr "date limite d'envoi des notes de synthèse pour la seconde phase"
 
-#: participation/models.py:341
+#: participation/models.py:347
 msgid "third phase date"
 msgstr "date du troisième tour"
 
-#: participation/models.py:346
+#: participation/models.py:352
 msgid "check this case when solutions for the third round become available"
 msgstr ""
 "cocher la case lorsque les solutions pour le second tour sont accessibles"
 
-#: participation/models.py:351
+#: participation/models.py:357
 msgid "limit date to upload the syntheses for the third phase"
 msgstr ""
 "date limite pour envoyer les notes de synthèses pour la troisième phase"
 
-#: participation/models.py:356
+#: participation/models.py:362
 #: participation/templates/participation/tournament_detail.html:52
 msgid "description"
 msgstr "description"
 
-#: participation/models.py:362
+#: participation/models.py:368
 #: participation/templates/participation/tournament_detail.html:12
 msgid "organizers"
 msgstr "organisateur⋅rices"
 
-#: participation/models.py:367
+#: participation/models.py:373
 #: participation/templates/participation/team_detail.html:167
 msgid "final"
 msgstr "finale"
 
-#: participation/models.py:375
+#: participation/models.py:381
 msgid "Google Sheet ID"
 msgstr "ID de la feuille Google Sheets"
 
-#: participation/models.py:722 registration/admin.py:125
+#: participation/models.py:728 registration/admin.py:125
 msgid "tournaments"
 msgstr "tournois"
 
-#: participation/models.py:751
+#: participation/models.py:757
 msgid "valid team"
 msgstr "équipe valide"
 
-#: participation/models.py:752
+#: participation/models.py:758
 msgid "The participation got the validation of the organizers."
 msgstr "La participation a été validée par les organisateur⋅rices."
 
-#: participation/models.py:758
+#: participation/models.py:764
 msgid "The team is selected for the final tournament."
 msgstr "L'équipe est sélectionnée pour la finale."
 
-#: participation/models.py:762
+#: participation/models.py:768
 msgid "mention"
 msgstr "mention"
 
-#: participation/models.py:769
+#: participation/models.py:775
 msgid "mention (final)"
 msgstr "Mention (pour la finale) :"
 
-#: participation/models.py:779
+#: participation/models.py:785
 #, python-brace-format
 msgid "Participation of the team {name} ({trigram})"
 msgstr "Participation de l'équipe {name} ({trigram})"
 
-#: participation/models.py:786
+#: participation/models.py:792
 #, python-brace-format
 msgid ""
 "<p>The team {trigram} has {nb_missing_payments} missing payments. Each "
@@ -1092,11 +1097,11 @@ msgstr ""
 "notification de bourse) pour participer au tournoi.</p><p>Les participant⋅es "
 "qui n'ont pas encore payé sont : {participants}.</p>"
 
-#: participation/models.py:794
+#: participation/models.py:800
 msgid "Missing payments"
 msgstr "Paiements manquants"
 
-#: participation/models.py:811
+#: participation/models.py:817
 msgid ""
 "<p>The solutions for the tournament of {tournament} are due on the {date:%Y-"
 "%m-%d %H:%M}.</p><p>You have currently sent <strong>{nb_solutions}</strong> "
@@ -1111,11 +1116,11 @@ msgstr ""
 "pouvez envoyer vos solutions sur <a href='{url}'>votre page de "
 "participation</a>.</p>"
 
-#: participation/models.py:821 participation/models.py:835
+#: participation/models.py:827 participation/models.py:841
 msgid "Solutions due"
 msgstr "Rendu des solutions"
 
-#: participation/models.py:827
+#: participation/models.py:833
 msgid ""
 "<p>The solutions for the tournament of {tournament} are due on the {date:%Y-"
 "%m-%d %H:%M}.</p><p>Remember that you can only fix minor changes to your "
@@ -1128,7 +1133,7 @@ msgstr ""
 "parties.</p><p>Vous pouvez envoyer vos solutions sur <a href='{url}'>votre "
 "page de participation</a>.</p>"
 
-#: participation/models.py:841 registration/models.py:607
+#: participation/models.py:847 registration/models.py:607
 msgid ""
 "<p>The draw of the solutions for the tournament {tournament} is planned on "
 "the {date:%Y-%m-%d %H:%M}. You can join it on <a href='{url}'>this link</a>."
@@ -1138,11 +1143,11 @@ msgstr ""
 "{date:%d/%m/%Y %H:%M}. Vous pouvez y participer sur <a href='{url}'>ce lien</"
 "a>.</p>"
 
-#: participation/models.py:847 registration/models.py:614
+#: participation/models.py:853 registration/models.py:614
 msgid "Draw of solutions"
 msgstr "Tirage au sort des solutions"
 
-#: participation/models.py:857
+#: participation/models.py:863
 #, python-brace-format
 msgid ""
 "<p>The solutions draw is ended. You can check the result on <a "
@@ -1154,8 +1159,8 @@ msgstr ""
 "tour, vous défendrez <a href='{solution_url}'>votre solution du problème "
 "{problem}</a>.</p>"
 
-#: participation/models.py:866 participation/models.py:908
-#: participation/models.py:951
+#: participation/models.py:872 participation/models.py:914
+#: participation/models.py:957
 #, python-brace-format
 msgid ""
 "<p>You will oppose the solution of the team {opponent} on the <a "
@@ -1166,8 +1171,8 @@ msgstr ""
 "href='{solution_url}'>problème {problem}</a>. Vous pouvez envoyer votre note "
 "de synthèse sur <a href='{passage_url}'>cette page</a>.</p>"
 
-#: participation/models.py:875 participation/models.py:917
-#: participation/models.py:960
+#: participation/models.py:881 participation/models.py:923
+#: participation/models.py:966
 #, python-brace-format
 msgid ""
 "<p>You will report the solution of the team {reporter} on the <a "
@@ -1178,11 +1183,11 @@ msgstr ""
 "href='{solution_url}'>problème {problem}</a>. Vous pouvez envoyer votre note "
 "de synthèse sur <a href='{passage_url}'>cette page</a>.</p>"
 
-#: participation/models.py:891 registration/models.py:629
+#: participation/models.py:897 registration/models.py:629
 msgid "First round"
 msgstr "Premier tour"
 
-#: participation/models.py:901
+#: participation/models.py:907
 #, python-brace-format
 msgid ""
 "<p>For the second round, you will defend <a href='{solution_url}'>your "
@@ -1191,12 +1196,12 @@ msgstr ""
 "<p>Pour le second tour, vous défendrez <a href='{solution_url}'>votre "
 "solution du problème {problem}</a>.</p>"
 
-#: participation/models.py:933 participation/models.py:976
+#: participation/models.py:939 participation/models.py:982
 #: registration/models.py:640
 msgid "Second round"
 msgstr "Second tour"
 
-#: participation/models.py:944
+#: participation/models.py:950
 #, python-brace-format
 msgid ""
 "<p>For the third round, you will defend <a href='{solution_url}'>your "
@@ -1205,7 +1210,7 @@ msgstr ""
 "<p>Pour le troisième tour, vous défendrez <a href='{solution_url}'>votre "
 "solution du problème {problem}</a>.</p>"
 
-#: participation/models.py:982
+#: participation/models.py:988
 #, python-brace-format
 msgid ""
 "<p>The tournament {tournament} is ended. You can check the results on the <a "
@@ -1214,57 +1219,57 @@ msgstr ""
 "<p>Le tournoi {tournament} est terminé. Vous pouvez consulter les résultats "
 "sur la <a href='{url}'>page du tournoi</a>.</p>"
 
-#: participation/models.py:987
+#: participation/models.py:993
 msgid "Tournament ended"
 msgstr "Tournoi terminé"
 
-#: participation/models.py:997 participation/models.py:1040
+#: participation/models.py:1003 participation/models.py:1046
 msgid "participations"
 msgstr "participations"
 
-#: participation/models.py:1012 participation/models.py:1013
-#: participation/models.py:1014
+#: participation/models.py:1018 participation/models.py:1019
+#: participation/models.py:1020
 #, python-brace-format
 msgid "Round {round}"
 msgstr "Tour {round}"
 
-#: participation/models.py:1028
+#: participation/models.py:1034
 msgid "room"
 msgstr "salle"
 
-#: participation/models.py:1030
+#: participation/models.py:1036
 msgid "Room 1"
 msgstr "Salle 1"
 
-#: participation/models.py:1031
+#: participation/models.py:1037
 msgid "Room 2"
 msgstr "Salle 2"
 
-#: participation/models.py:1034
+#: participation/models.py:1040
 msgid "For 5-teams pools only"
 msgstr "Pour les poules de 5 équipe uniquement"
 
-#: participation/models.py:1046
+#: participation/models.py:1052
 msgid "juries"
 msgstr "jurys"
 
-#: participation/models.py:1055
+#: participation/models.py:1061
 msgid "president of the jury"
 msgstr "président⋅e du jury"
 
-#: participation/models.py:1062
+#: participation/models.py:1068
 msgid "BigBlueButton URL"
 msgstr "Lien BigBlueButton"
 
-#: participation/models.py:1063
+#: participation/models.py:1069
 msgid "The link of the BBB visio for this pool."
 msgstr "Le lien du salon BBB pour cette poule."
 
-#: participation/models.py:1068
+#: participation/models.py:1074
 msgid "results available"
 msgstr "résultats disponibles"
 
-#: participation/models.py:1069
+#: participation/models.py:1075
 msgid ""
 "Check this case when results become accessible to teams. They stay "
 "accessible to you. Only averages are given."
@@ -1273,33 +1278,33 @@ msgstr ""
 "Ils restent toujours accessibles pour vous. Seules les moyennes sont "
 "communiquées."
 
-#: participation/models.py:1101
+#: participation/models.py:1107
 msgid "The president of the jury must be part of the jury."
 msgstr "Læ président⋅e du jury doit faire partie du jury."
 
-#: participation/models.py:1490
+#: participation/models.py:1496
 #, python-brace-format
 msgid "The jury {jury} is not part of the jury for this pool."
 msgstr "{jury} ne fait pas partie du jury pour cette poule."
 
-#: participation/models.py:1503
+#: participation/models.py:1509
 #, python-brace-format
 msgid "Pool {code} for tournament {tournament} with teams {teams}"
 msgstr "Poule {code} du tournoi {tournament} avec les équipes {teams}"
 
-#: participation/models.py:1523
+#: participation/models.py:1529
 msgid "position"
 msgstr "position"
 
-#: participation/models.py:1530
+#: participation/models.py:1536
 msgid "defended solution"
 msgstr "solution défendue"
 
-#: participation/models.py:1558
+#: participation/models.py:1564
 msgid "penalties"
 msgstr "pénalités"
 
-#: participation/models.py:1560
+#: participation/models.py:1566
 msgid ""
 "Number of penalties for the defender. The defender will loose a 0.5 "
 "coefficient per penalty."
@@ -1307,120 +1312,120 @@ msgstr ""
 "Nombre de pénalités pour l'équipe défenseuse. Elle perd un coefficient 0.5 "
 "sur sa présentation orale par pénalité."
 
-#: participation/models.py:1629 participation/models.py:1632
-#: participation/models.py:1635
+#: participation/models.py:1635 participation/models.py:1638
+#: participation/models.py:1641
 #, python-brace-format
 msgid "Team {trigram} is not registered in the pool."
 msgstr "L'équipe {trigram} n'est pas inscrite dans la poule."
 
-#: participation/models.py:1640
+#: participation/models.py:1646
 #, python-brace-format
 msgid "Passage of {defender} for problem {problem}"
 msgstr "Passage de {defender} pour le problème {problem}"
 
-#: participation/models.py:1644 participation/models.py:1653
-#: participation/models.py:1738 participation/models.py:1780
+#: participation/models.py:1650 participation/models.py:1659
+#: participation/models.py:1744 participation/models.py:1786
 msgid "passage"
 msgstr "passage"
 
-#: participation/models.py:1645
+#: participation/models.py:1651
 msgid "passages"
 msgstr "passages"
 
-#: participation/models.py:1664
+#: participation/models.py:1670
 msgid "difference"
 msgstr "différence"
 
-#: participation/models.py:1665
+#: participation/models.py:1671
 msgid "Score to add/remove on the final score"
 msgstr "Score à ajouter/retrancher au score final"
 
-#: participation/models.py:1672
+#: participation/models.py:1678
 msgid "tweak"
 msgstr "harmonisation"
 
-#: participation/models.py:1673
+#: participation/models.py:1679
 msgid "tweaks"
 msgstr "harmonisations"
 
-#: participation/models.py:1701
+#: participation/models.py:1707
 msgid "solution for the final tournament"
 msgstr "solution pour la finale"
 
-#: participation/models.py:1706 participation/models.py:1749
+#: participation/models.py:1712 participation/models.py:1755
 msgid "file"
 msgstr "fichier"
 
-#: participation/models.py:1716
+#: participation/models.py:1722
 #, python-brace-format
 msgid "Solution of team {team} for problem {problem}"
 msgstr "Solution de l'équipe {team} pour le problème {problem}"
 
-#: participation/models.py:1718
+#: participation/models.py:1724
 msgid "for final"
 msgstr "pour la finale"
 
-#: participation/models.py:1721
+#: participation/models.py:1727
 msgid "solution"
 msgstr "solution"
 
-#: participation/models.py:1722
+#: participation/models.py:1728
 msgid "solutions"
 msgstr "solutions"
 
-#: participation/models.py:1755
+#: participation/models.py:1761
 #, python-brace-format
 msgid "Synthesis of {team} as {type} for problem {problem} of {defender}"
 msgstr ""
 "Note de synthèse de l'équipe {team} en tant que {type} pour le problème "
 "{problem} de {defender}"
 
-#: participation/models.py:1763
+#: participation/models.py:1769
 msgid "synthesis"
 msgstr "note de synthèse"
 
-#: participation/models.py:1764
+#: participation/models.py:1770
 msgid "syntheses"
 msgstr "notes de synthèse"
 
-#: participation/models.py:1773
+#: participation/models.py:1779
 msgid "jury"
 msgstr "jury"
 
-#: participation/models.py:1785
+#: participation/models.py:1791
 msgid "defender writing note"
 msgstr "note d'écrit défenseur⋅se"
 
-#: participation/models.py:1791
+#: participation/models.py:1797
 msgid "defender oral note"
 msgstr "note d'oral défenseur⋅se"
 
-#: participation/models.py:1797
+#: participation/models.py:1803
 msgid "opponent writing note"
 msgstr "note d'écrit opposant⋅e"
 
-#: participation/models.py:1803
+#: participation/models.py:1809
 msgid "opponent oral note"
 msgstr "note d'oral opposant⋅e"
 
-#: participation/models.py:1809
+#: participation/models.py:1815
 msgid "reporter writing note"
 msgstr "note d'écrit rapporteur⋅rice"
 
-#: participation/models.py:1815
+#: participation/models.py:1821
 msgid "reporter oral note"
 msgstr "note d'oral du rapporteur⋅rice"
 
-#: participation/models.py:1875
+#: participation/models.py:1881
 #, python-brace-format
 msgid "Notes of {jury} for {passage}"
 msgstr "Notes de {jury} pour le {passage}"
 
-#: participation/models.py:1878
+#: participation/models.py:1884
 msgid "note"
 msgstr "note"
 
-#: participation/models.py:1879
+#: participation/models.py:1885
 msgid "notes"
 msgstr "notes"
 
@@ -2981,8 +2986,8 @@ msgid ""
 "You recently registered on the ETEAM platform. Please click on the link "
 "below to confirm your registration."
 msgstr ""
-"Vous vous êtes inscrit⋅e sur la plateforme de l'ETEAM. Merci de cliquer sur le "
-"lien ci-dessous pour confirmer votre inscription."
+"Vous vous êtes inscrit⋅e sur la plateforme de l'ETEAM. Merci de cliquer sur "
+"le lien ci-dessous pour confirmer votre inscription."
 
 #: registration/templates/registration/mails/email_validation_email.html:26
 #: registration/templates/registration/mails/email_validation_email.txt:9
@@ -3067,13 +3072,12 @@ msgstr "L'équipe de l'ETEAM"
 #: registration/templates/registration/mails/payment_reminder.txt:4
 #, python-format
 msgid ""
-"You are registered for the ETEAM. Your team %(team)s has "
-"been successfully validated. To end your inscription, you must pay the "
-"amount of %(amount)s €."
+"You are registered for the ETEAM. Your team %(team)s has been successfully "
+"validated. To end your inscription, you must pay the amount of %(amount)s €."
 msgstr ""
-"Vous êtes inscrit⋅e pour l'ETEAM. Votre équipe %(team)s a "
-"été validée avec succès. Pour finaliser votre inscription, vous devez payer "
-"le montant de %(amount)s €."
+"Vous êtes inscrit⋅e pour l'ETEAM. Votre équipe %(team)s a été validée avec "
+"succès. Pour finaliser votre inscription, vous devez payer le montant de "
+"%(amount)s €."
 
 #: registration/templates/registration/mails/payment_reminder.html:24
 #: registration/templates/registration/mails/payment_reminder.txt:9
@@ -3841,31 +3845,31 @@ msgstr "Nous contacter"
 msgid "About"
 msgstr "À propos"
 
-#: tfjm/templates/index_eteam.html:9 tfjm/templates/index_tfjm.html:9
+#: tfjm/templates/index_eteam.html:11 tfjm/templates/index_tfjm.html:11
 msgid "Welcome onto the registration site of the"
 msgstr " Bienvenue sur le site d'inscription au"
 
-#: tfjm/templates/index_eteam.html:18
+#: tfjm/templates/index_eteam.html:20
 msgid "You want to participate to the ETEAM ?"
 msgstr " Tu souhaites participer à l'ETEAM ?"
 
-#: tfjm/templates/index_eteam.html:20
+#: tfjm/templates/index_eteam.html:22
 msgid "Your team is selected and already complete?"
 msgstr "Ton équipe est sélectionnée et déjà formée ?"
 
-#: tfjm/templates/index_eteam.html:25 tfjm/templates/index_tfjm.html:25
+#: tfjm/templates/index_eteam.html:27 tfjm/templates/index_tfjm.html:27
 msgid "Register now!"
 msgstr "Inscris-toi maintenant !"
 
-#: tfjm/templates/index_eteam.html:26 tfjm/templates/index_tfjm.html:26
+#: tfjm/templates/index_eteam.html:28 tfjm/templates/index_tfjm.html:28
 msgid "I already have an account"
 msgstr "J'ai déjà un compte"
 
-#: tfjm/templates/index_eteam.html:32 tfjm/templates/index_tfjm.html:32
+#: tfjm/templates/index_eteam.html:34 tfjm/templates/index_tfjm.html:34
 msgid "How does it work?"
 msgstr "Comment ça marche ?"
 
-#: tfjm/templates/index_eteam.html:35
+#: tfjm/templates/index_eteam.html:37
 #, python-format
 msgid ""
 "To participate to the ETEAM, you must be selected by your national "
@@ -3878,7 +3882,7 @@ msgstr ""
 "créer un compte sur la <strong><a href=\"%(signup_url)s\">page "
 "d'inscription</a></strong>. Vous devrez ensuite confirmer votre adresse mail."
 
-#: tfjm/templates/index_eteam.html:44
+#: tfjm/templates/index_eteam.html:46
 #, python-format
 msgid ""
 "You can access your account via the <strong><a href=\"%(login_url)s\">Login</"
@@ -3900,16 +3904,16 @@ msgstr ""
 "valider votre équipe pour pouvoir travailler sur les problèmes de votre "
 "choix."
 
-#: tfjm/templates/index_eteam.html:53 tfjm/templates/index_tfjm.html:62
+#: tfjm/templates/index_eteam.html:55 tfjm/templates/index_tfjm.html:64
 msgid "I have a question"
 msgstr "J'ai une question"
 
-#: tfjm/templates/index_eteam.html:56
+#: tfjm/templates/index_eteam.html:58
 msgid ""
 "Do not hesitate to consult the <a href=\"/doc/\" "
 "target=\"_blank\">documentation</a> of the site, to check if the answer is "
 "not already there. Also refer of course to the <a href=\"https://eteam.tfjm."
-"org/rules/\" target=\"_blank\">𝕋𝔽𝕁𝕄² rules</a>. For any other question, do "
+"org/rules/\" target=\"_blank\">ETEAM rules</a>. For any other question, do "
 "not hesitate to contact us by email at the address <a href=\"mailto:"
 "eteam_moc@proton.me \"> eteam_moc@proton.me </a>."
 msgstr ""
@@ -3920,15 +3924,15 @@ msgstr ""
 "autre question, n'hésitez pas à nous contacter par mail à l'adresse <a "
 "href=\"mailto:eteam_moc@proton.me\"> eteam_moc@proton.me </a>."
 
-#: tfjm/templates/index_tfjm.html:18
+#: tfjm/templates/index_tfjm.html:20
 msgid "You want to participate to the 𝕋𝔽𝕁𝕄² ?"
 msgstr " Tu souhaites participer au 𝕋𝔽𝕁𝕄² ?"
 
-#: tfjm/templates/index_tfjm.html:20
+#: tfjm/templates/index_tfjm.html:22
 msgid "Your team is already complete?"
 msgstr "Ton équipe est déjà formée ?"
 
-#: tfjm/templates/index_tfjm.html:35
+#: tfjm/templates/index_tfjm.html:37
 #, python-format
 msgid ""
 "To participate to the 𝕋𝔽𝕁𝕄², you just need to create an account on the "
@@ -3939,7 +3943,7 @@ msgstr ""
 "<strong><a href=\"%(signup_url)s\">page d'inscription</a></strong>. Vous "
 "devrez ensuite confirmer votre adresse mail."
 
-#: tfjm/templates/index_tfjm.html:43
+#: tfjm/templates/index_tfjm.html:45
 #, python-format
 msgid ""
 "You can access your account via the <strong><a href=\"%(login_url)s\">Login</"
@@ -3961,11 +3965,11 @@ msgstr ""
 "valider votre équipe pour pouvoir travailler sur les problèmes de votre "
 "choix."
 
-#: tfjm/templates/index_tfjm.html:52
+#: tfjm/templates/index_tfjm.html:54
 msgid "I can't find a team, help me!"
 msgstr "Je ne trouve pas d'équipe, aidez-moi !"
 
-#: tfjm/templates/index_tfjm.html:56
+#: tfjm/templates/index_tfjm.html:58
 msgid ""
 "You can contact us at the address <a href=\"mailto:contact@tfjm."
 "org\">contact@tfjm.org</a> so that we can help you get in touch with other "
@@ -3975,7 +3979,7 @@ msgstr ""
 "org\">contact@tfjm.org</a> pour que nous puissions vous mettre en relation "
 "avec d'autres participant⋅es qui cherchent également une équipe."
 
-#: tfjm/templates/index_tfjm.html:65
+#: tfjm/templates/index_tfjm.html:67
 msgid ""
 "Do not hesitate to consult the <a href=\"/doc/\" "
 "target=\"_blank\">documentation</a> of the site, to check if the answer is "
@@ -3995,11 +3999,11 @@ msgstr ""
 "&#109;&#46;&#111;&#114;&#103;\"> &#99;&#111;&#110;&#116;&#97;&#99;&#116;&#64;"
 "&#116;&#102;&#106;&#109;&#46;&#111;&#114;&#103; </a>."
 
-#: tfjm/templates/index_tfjm.html:77
+#: tfjm/templates/index_tfjm.html:79
 msgid "Save the dates!"
 msgstr "Attention aux dates !"
 
-#: tfjm/templates/index_tfjm.html:78
+#: tfjm/templates/index_tfjm.html:80
 msgid ""
 "If you don't end your registration by the indicated deadline, you will "
 "unfortunately not be able to participate in the 𝕋𝔽𝕁𝕄²."
@@ -4007,7 +4011,7 @@ msgstr ""
 "Si vous ne finalisez pas votre inscription avant la date limite indiquée, "
 "vous ne pourrez malheureusement pas participer au 𝕋𝔽𝕁𝕄²."
 
-#: tfjm/templates/navbar.html:19 tfjm/urls.py:33
+#: tfjm/templates/navbar.html:19 tfjm/urls.py:34
 msgid "Home"
 msgstr "Accueil"
 
@@ -4091,16 +4095,3 @@ msgstr "Aucun résultat."
 #: tfjm/templates/sidebar.html:10 tfjm/templates/sidebar.html:21
 msgid "Informations"
 msgstr "Informations"
-
-#~ msgid ""
-#~ "Please note that these dates may be subject to change. If your local "
-#~ "organizers gave you different dates, trust them."
-#~ msgstr ""
-#~ "Veuillez noter que ces dates peuvent être sujettes à changement. Si vos "
-#~ "organisateur⋅rices locaux⋅ales vous ont donné des dates différentes, "
-#~ "faites-leur confiance."
-
-#~ msgid "date when solutions of round 2 are available"
-#~ msgstr ""
-#~ "date à partir de laquelle les solutions pour le second tour sont "
-#~ "disponibles"
diff --git a/participation/migrations/0017_alter_passage_solution_number_alter_pool_round_and_more.py b/participation/migrations/0017_alter_passage_solution_number_alter_pool_round_and_more.py
new file mode 100644
index 0000000..124c9f6
--- /dev/null
+++ b/participation/migrations/0017_alter_passage_solution_number_alter_pool_round_and_more.py
@@ -0,0 +1,77 @@
+# Generated by Django 5.0.6 on 2024-06-13 08:53
+
+import django.core.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("participation", "0016_tournament_date_first_phase_and_more"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="passage",
+            name="solution_number",
+            field=models.PositiveSmallIntegerField(
+                choices=[
+                    (1, "Problem #1"),
+                    (2, "Problem #2"),
+                    (3, "Problem #3"),
+                    (4, "Problem #4"),
+                    (5, "Problem #5"),
+                    (6, "Problem #6"),
+                    (7, "Problem #7"),
+                    (8, "Problem #8"),
+                    (9, "Problem #9"),
+                    (10, "Problem #10"),
+                ],
+                verbose_name="defended solution",
+            ),
+        ),
+        migrations.AlterField(
+            model_name="pool",
+            name="round",
+            field=models.PositiveSmallIntegerField(
+                choices=[(1, "Round 1"), (2, "Round 2"), (3, "Round 3")],
+                verbose_name="round",
+            ),
+        ),
+        migrations.AlterField(
+            model_name="solution",
+            name="problem",
+            field=models.PositiveSmallIntegerField(
+                choices=[
+                    (1, "Problem #1"),
+                    (2, "Problem #2"),
+                    (3, "Problem #3"),
+                    (4, "Problem #4"),
+                    (5, "Problem #5"),
+                    (6, "Problem #6"),
+                    (7, "Problem #7"),
+                    (8, "Problem #8"),
+                    (9, "Problem #9"),
+                    (10, "Problem #10"),
+                ],
+                verbose_name="problem",
+            ),
+        ),
+        migrations.AlterField(
+            model_name="team",
+            name="trigram",
+            field=models.CharField(
+                help_text="The code must be composed of 4 uppercase letters.",
+                max_length=4,
+                unique=True,
+                validators=[
+                    django.core.validators.RegexValidator("^[A-Z]{3}[A-Z]*$"),
+                    django.core.validators.RegexValidator(
+                        "^(?!BIT$|CNO$|CRO$|CUL$|FTG$|FCK$|FUC$|FUK$|FYS$|HIV$|IST$|MST$|KKK$|KYS$|SEX$)",
+                        message="This team code is forbidden.",
+                    ),
+                ],
+                verbose_name="code",
+            ),
+        ),
+    ]
diff --git a/participation/models.py b/participation/models.py
index 66022de..f6ece2d 100644
--- a/participation/models.py
+++ b/participation/models.py
@@ -38,13 +38,13 @@ class Team(models.Model):
     )
 
     trigram = models.CharField(
-        max_length=settings.TEAM_CODE_LENGTH,
+        max_length=4,
         verbose_name=_("code"),
         help_text=format_lazy(_("The code must be composed of {nb_letters} uppercase letters."),
                               nb_letters=settings.TEAM_CODE_LENGTH),
         unique=True,
         validators=[
-            RegexValidator("^[A-Z]{" + str(settings.TEAM_CODE_LENGTH) + "}$"),
+            RegexValidator("^[A-Z]{3}[A-Z]*$"),
             RegexValidator(fr"^(?!{'|'.join(f'{t}$' for t in settings.FORBIDDEN_TRIGRAMS)})",
                            message=_("This team code is forbidden.")),
         ],
@@ -236,6 +236,12 @@ class Team(models.Model):
             get_sympa_client().unsubscribe(self.email, "equipes-non-valides", False)
         get_sympa_client().delete_list(f"equipe-{self.trigram}")
 
+    def clean(self):
+        if len(self.trigram) != settings.TEAM_CODE_LENGTH:
+            raise ValidationError({'trigram': _("The team code must be composed of {nb_letters} uppercase letters.")},
+                                  params={'nb_letters': settings.TEAM_CODE_LENGTH})
+        return super().clean()
+
     def save(self, *args, **kwargs):
         if not self.access_code:
             # if the team got created, generate the access code, create the contact mailing list