diff --git a/apps/participation/migrations/0009_auto_20210114_1313.py b/apps/participation/migrations/0009_auto_20210114_1313.py
new file mode 100644
index 0000000..64b6657
--- /dev/null
+++ b/apps/participation/migrations/0009_auto_20210114_1313.py
@@ -0,0 +1,43 @@
+# Generated by Django 3.0.11 on 2021-01-14 12:13
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('participation', '0008_auto_20210113_1700'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Passage',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('place', models.CharField(default='Non indiqué', help_text='Where the solution is presented?', max_length=255, verbose_name='place')),
+                ('defender', models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='+', to='participation.Participation', verbose_name='defender')),
+                ('opponent', models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='+', to='participation.Participation', verbose_name='opponent')),
+                ('pool', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='passages', to='participation.Pool', verbose_name='pool')),
+                ('reporter', models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='+', to='participation.Participation', verbose_name='reporter')),
+            ],
+            options={
+                'verbose_name': 'passage',
+                'verbose_name_plural': 'passages',
+            },
+        ),
+        migrations.AddField(
+            model_name='synthesis',
+            name='passage',
+            field=models.ForeignKey(default=None, on_delete=django.db.models.deletion.CASCADE, related_name='syntheses', to='participation.Passage', verbose_name='passage'),
+            preserve_default=False,
+        ),
+        migrations.AlterUniqueTogether(
+            name='synthesis',
+            unique_together={('participation', 'passage', 'type')},
+        ),
+        migrations.RemoveField(
+            model_name='synthesis',
+            name='pool',
+        ),
+    ]
diff --git a/apps/participation/models.py b/apps/participation/models.py
index 79303b2..6de2376 100644
--- a/apps/participation/models.py
+++ b/apps/participation/models.py
@@ -5,6 +5,7 @@ import os
 
 from address.models import AddressField
 from django.conf import settings
+from django.core.exceptions import ValidationError
 from django.core.validators import RegexValidator
 from django.db import models
 from django.db.models import Index
@@ -324,6 +325,59 @@ class Pool(models.Model):
         verbose_name_plural = _("pools")
 
 
+class Passage(models.Model):
+    pool = models.ForeignKey(
+        Pool,
+        on_delete=models.CASCADE,
+        verbose_name=_("pool"),
+        related_name="passages",
+    )
+
+    place = models.CharField(
+        verbose_name=_("place"),
+        max_length=255,
+        help_text=_("Where the solution is presented?"),
+        default="Non indiqué",
+    )
+
+    defender = models.ForeignKey(
+        Participation,
+        on_delete=models.PROTECT,
+        verbose_name=_("defender"),
+        related_name="+",
+    )
+
+    opponent = models.ForeignKey(
+        Participation,
+        on_delete=models.PROTECT,
+        verbose_name=_("opponent"),
+        related_name="+",
+    )
+
+    reporter = models.ForeignKey(
+        Participation,
+        on_delete=models.PROTECT,
+        verbose_name=_("reporter"),
+        related_name="+",
+    )
+
+    def clean(self):
+        if self.defender not in self.pool.participations.all():
+            raise ValidationError(_("Team {trigram} is not registered in the pool.")
+                                  .format(trigram=self.defender.team.trigram))
+        if self.opponent not in self.pool.participations.all():
+            raise ValidationError(_("Team {trigram} is not registered in the pool.")
+                                  .format(trigram=self.opponent.team.trigram))
+        if self.reporter not in self.pool.participations.all():
+            raise ValidationError(_("Team {trigram} is not registered in the pool.")
+                                  .format(trigram=self.reporter.team.trigram))
+        return super().clean()
+
+    class Meta:
+        verbose_name = _("passage")
+        verbose_name_plural = _("passages")
+
+
 def get_solution_filename(instance, filename):
     return f"solutions/{instance.participation.team.trigram}_{instance.problem}" \
            + ("final" if instance.final_solution else "")
@@ -378,11 +432,11 @@ class Synthesis(models.Model):
         verbose_name=_("participation"),
     )
 
-    pool = models.ForeignKey(
-        Pool,
+    passage = models.ForeignKey(
+        Passage,
         on_delete=models.CASCADE,
         related_name="syntheses",
-        verbose_name=_("pool"),
+        verbose_name=_("passage"),
     )
 
     type = models.PositiveSmallIntegerField(
@@ -400,10 +454,7 @@ class Synthesis(models.Model):
         default="",
     )
 
-    def __str__(self):
-        return repr(self)
-
     class Meta:
         verbose_name = _("synthesis")
         verbose_name_plural = _("syntheses")
-        unique_together = (('participation', 'pool', 'type', ), )
+        unique_together = (('participation', 'passage', 'type', ), )