diff --git a/IMPLEMENTATION_CHECKLIST.md b/IMPLEMENTATION_CHECKLIST.md
index 18e06d3..e286d3f 100644
--- a/IMPLEMENTATION_CHECKLIST.md
+++ b/IMPLEMENTATION_CHECKLIST.md
@@ -107,7 +107,8 @@
 - [x] Фазы: Mulligan → Stand → Draw → Ride → Main → Battle → End.
 - [x] Старт: выбор grade 0 → выставление → маллиган.
 - [x] Действия: Ride, Call, Attack, Guard, Drive, Damage, Stand/Rest, Retire, Draw.
-- [ ] Move, Intercept, Boost, Discard, Shuffle как отдельные интенты.
+- [x] Поддержка (Boost) как отдельная способность: по умолчанию у 0–1 ранга, передаёт силу карте впереди в той же колонне; `BoostOverride` позволяет выдать или снять её эффектом.
+- [ ] Move, Intercept, Discard, Shuffle как отдельные интенты.
 - [ ] `driveCheckCount` как модифицируемое свойство (сейчас константа 2).
 - [x] Результат боя: `Hit` / `Guarded` как событие.
 - [ ] Событийная шина и три обработчика: Continuous / Activated / Triggered.
diff --git a/server/src/Vanguard.Content/CardSetFile.cs b/server/src/Vanguard.Content/CardSetFile.cs
index 7622485..adbaf7a 100644
--- a/server/src/Vanguard.Content/CardSetFile.cs
+++ b/server/src/Vanguard.Content/CardSetFile.cs
@@ -24,6 +24,9 @@ public sealed class CardEntry
     public Clan Clan { get; set; }
     public bool Sentinel { get; set; }
     public bool Restraint { get; set; }
+
+    /// <summary>null — по умолчанию (0 и 1 ранг поддерживают).</summary>
+    public bool? Boost { get; set; }
     public string? TextEn { get; set; }
     public string? TextRu { get; set; }
 
@@ -41,6 +44,7 @@ public sealed class CardEntry
         Clan = Clan,
         IsSentinel = Sentinel,
         IsRestraint = Restraint,
+        BoostOverride = Boost,
         TextEn = TextEn,
         TextRu = TextRu,
     };
diff --git a/server/src/Vanguard.Rules/Cards/CardDefinition.cs b/server/src/Vanguard.Rules/Cards/CardDefinition.cs
index f94104c..3a9b12a 100644
--- a/server/src/Vanguard.Rules/Cards/CardDefinition.cs
+++ b/server/src/Vanguard.Rules/Cards/CardDefinition.cs
@@ -25,6 +25,15 @@ public sealed record CardDefinition
     /// <summary>Restraint: не может атаковать.</summary>
     public bool IsRestraint { get; init; }
 
+    /// <summary>
+    /// Явное переопределение печатной поддержки. null — по умолчанию:
+    /// карты 0 и 1 ранга поддерживают, остальные нет.
+    /// </summary>
+    public bool? BoostOverride { get; init; }
+
+    /// <summary>Печатная способность поддержки. Эффекты могут изменить её в рантайме.</summary>
+    public bool HasBoost => BoostOverride ?? Grade <= 1;
+
     public string? TextEn { get; init; }
     public string? TextRu { get; init; }
 
diff --git a/server/src/Vanguard.Rules/Engine/GameCommands.cs b/server/src/Vanguard.Rules/Engine/GameCommands.cs
index 685e32d..bbe743c 100644
--- a/server/src/Vanguard.Rules/Engine/GameCommands.cs
+++ b/server/src/Vanguard.Rules/Engine/GameCommands.cs
@@ -8,7 +8,7 @@ public sealed record RideCommand(string PrintingId) : GameCommand;
 public sealed record SkipRideCommand : GameCommand;
 public sealed record CallCommand(string PrintingId, int Slot) : GameCommand;
 public sealed record EnterBattleCommand : GameCommand;
-public sealed record AttackCommand(int AttackerSlot, int TargetSlot) : GameCommand;
+public sealed record AttackCommand(int AttackerSlot, int TargetSlot, int BoosterSlot = -1) : GameCommand;
 public sealed record GuardCommand(string PrintingId) : GameCommand;
 public sealed record PassGuardCommand : GameCommand;
 public sealed record ResolveTriggerCommand(int PowerTarget, int EffectTarget) : GameCommand;
diff --git a/server/src/Vanguard.Rules/Engine/GameEngine.cs b/server/src/Vanguard.Rules/Engine/GameEngine.cs
index 662a6eb..ff78dc7 100644
--- a/server/src/Vanguard.Rules/Engine/GameEngine.cs
+++ b/server/src/Vanguard.Rules/Engine/GameEngine.cs
@@ -8,7 +8,8 @@ namespace Vanguard.Rules.Engine;
 ///
 /// Упрощения первого среза (карты со способностями подключаются следующим шагом):
 ///   * Sentinel добавляет 0 щита и не оплачивает стоимость — Perfect Guard пока не работает;
-///   * Boost не реализован;
+///   * поддержка работает как отдельная способность: карты 0 и 1 ранга могут передать
+///     свою силу атакующему Арьергарду из той же колонны, сила действует только в этом бою;
 ///   * триггер требует выбора целей через ResolveTriggerCommand:
 ///     +5000 любой карте в кругах Авангарда или Арьергарда, затем второй эффект;
 ///     правило одинаково для drive check и damage check;
@@ -105,7 +106,7 @@ public sealed class GameEngine
         SkipRideCommand => SkipRide(),
         CallCommand c => Call(c.PrintingId, c.Slot),
         EnterBattleCommand => EnterBattle(),
-        AttackCommand c => Attack(c.AttackerSlot, c.TargetSlot),
+        AttackCommand c => Attack(c.AttackerSlot, c.TargetSlot, c.BoosterSlot),
         GuardCommand c => Guard(c.PrintingId),
         PassGuardCommand => PassGuard(),
         ResolveTriggerCommand c => ResolveTrigger(c),
@@ -228,7 +229,7 @@ public sealed class GameEngine
         return CommandResult.Ok();
     }
 
-    private CommandResult Attack(int attackerSlot, int targetSlot)
+    private CommandResult Attack(int attackerSlot, int targetSlot, int boosterSlot = -1)
     {
         if (State.Phase != Phase.Battle)
             return CommandResult.Reject("Атака доступна только в Боевой фазе.");
@@ -257,6 +258,27 @@ public sealed class GameEngine
         if (target is null)
             return CommandResult.Reject("Нет цели.");
 
+        CardInstance? booster = null;
+        if (boosterSlot >= 0)
+        {
+            if (attackerSlot is not (3 or 4))
+                return CommandResult.Reject("Поддерживать можно только атаку Арьергарда из переднего ряда.");
+
+            var expected = attackerSlot == 3 ? 0 : 2;
+            if (boosterSlot != expected)
+                return CommandResult.Reject("Поддержка возможна только из заднего ряда той же колонны.");
+
+            booster = State.GetUnit(State.ActivePlayer, boosterSlot);
+            if (booster is null)
+                return CommandResult.Reject("Нет карты для поддержки.");
+
+            if (booster.Rested)
+                return CommandResult.Reject("Карта поддержки уже повёрнута.");
+
+            if (!State.CanBoost(booster))
+                return CommandResult.Reject("Эта карта не может поддерживать.");
+        }
+
         var attackerPlayer = State.ActivePlayer;
         attacker.Rested = true;
         State.Battle = new BattleState
@@ -265,6 +287,14 @@ public sealed class GameEngine
             AttackerSlot = attackerSlot,
             TargetSlot = targetSlot,
         };
+
+        if (booster is not null)
+        {
+            booster.Rested = true;
+            State.Battle.BoostPower += State.Catalog.CardOf(booster.PrintingId).Power;
+            _events.Add(new BoostedEvent(attackerPlayer, boosterSlot, attackerSlot));
+        }
+
         State.Step = Step.Guard;
 
         // на шаге защиты ход ввода переходит обороняющемуся
@@ -534,7 +564,7 @@ public sealed class GameEngine
         var attackerDef = State.Catalog.CardOf(attacker.PrintingId);
         var targetDef = State.Catalog.CardOf(target.PrintingId);
 
-        var attackPower = attackerDef.Power + attacker.TemporaryPower;
+        var attackPower = attackerDef.Power + attacker.TemporaryPower + battle.BoostPower;
         var defensePower = targetDef.Power + target.TemporaryPower + battle.GuardShield;
         var hit = attackPower > defensePower;
 
diff --git a/server/src/Vanguard.Rules/Engine/GameEvents.cs b/server/src/Vanguard.Rules/Engine/GameEvents.cs
index 0a80ba9..f9ecb6c 100644
--- a/server/src/Vanguard.Rules/Engine/GameEvents.cs
+++ b/server/src/Vanguard.Rules/Engine/GameEvents.cs
@@ -11,6 +11,7 @@ public sealed record CardDrawnEvent(int Player) : GameEvent;
 public sealed record UnitRodeEvent(int Player, string PrintingId) : GameEvent;
 public sealed record UnitCalledEvent(int Player, int Slot, string PrintingId) : GameEvent;
 public sealed record AttackDeclaredEvent(int Player, int AttackerSlot, int TargetSlot) : GameEvent;
+public sealed record BoostedEvent(int Player, int BoosterSlot, int AttackerSlot) : GameEvent;
 public sealed record GuardAddedEvent(int Player, string PrintingId, int Shield) : GameEvent;
 public sealed record TriggerResolvedEvent(int Player, string PrintingId, TriggerType Trigger) : GameEvent;
 public sealed record TriggerAppliedEvent(int Player, int PowerTarget, int EffectTarget) : GameEvent;
diff --git a/server/src/Vanguard.Rules/Engine/GameModels.cs b/server/src/Vanguard.Rules/Engine/GameModels.cs
index 20d26c8..e6ef876 100644
--- a/server/src/Vanguard.Rules/Engine/GameModels.cs
+++ b/server/src/Vanguard.Rules/Engine/GameModels.cs
@@ -60,6 +60,12 @@ public sealed class CardInstance
 
     /// <summary>Временный бонус крита до конца текущего боя.</summary>
     public int TemporaryCritical { get; set; }
+
+    /// <summary>
+    /// Переопределение способности поддержки, выданное эффектом.
+    /// null — как напечатано на карте.
+    /// </summary>
+    public bool? BoostOverride { get; set; }
 }
 
 public sealed class PlayerState
diff --git a/server/src/Vanguard.Rules/Engine/GameState.cs b/server/src/Vanguard.Rules/Engine/GameState.cs
index 1ded7ac..0efcf8c 100644
--- a/server/src/Vanguard.Rules/Engine/GameState.cs
+++ b/server/src/Vanguard.Rules/Engine/GameState.cs
@@ -14,6 +14,9 @@ public sealed class BattleState
 
     public int GuardShield { get; set; }
     public int ChecksRemaining { get; set; }
+
+    /// <summary>Сила карт поддержки, действует только в этом бою.</summary>
+    public int BoostPower { get; set; }
     public List<CardInstance> GuardCards { get; } = new();
 }
 
@@ -49,6 +52,12 @@ public sealed class GameState
 
     public CardDefinition Definition(CardInstance card) => Catalog.CardOf(card.PrintingId);
 
+    /// <summary>
+    /// Итоговая способность поддержки: выданная эффектом важнее печатной.
+    /// </summary>
+    public bool CanBoost(CardInstance unit) =>
+        unit.BoostOverride ?? Definition(unit).HasBoost;
+
     public CardInstance? GetUnit(int player, int slot) =>
         slot < 0
             ? Players[player].Vanguard
diff --git a/server/tests/Vanguard.Rules.Tests/GameEngineTests.cs b/server/tests/Vanguard.Rules.Tests/GameEngineTests.cs
index ebdc21b..65d2aec 100644
--- a/server/tests/Vanguard.Rules.Tests/GameEngineTests.cs
+++ b/server/tests/Vanguard.Rules.Tests/GameEngineTests.cs
@@ -198,6 +198,78 @@ public class GameEngineTests
         Assert.Equal(0, vanguard.TemporaryPower);
     }
 
+    [Fact]
+    public void Boost_Adds_Back_Row_Power_To_Attacker()
+    {
+        var engine = ReadyToBoost();
+
+        Assert.True(engine.Execute(new AttackCommand(3, -1, 0)).Accepted);
+        Assert.True(engine.State.Players[0].RearGuards[0]!.Rested);
+        Assert.True(engine.Execute(new PassGuardCommand()).Accepted);
+
+        Assert.Single(engine.State.Players[1].Damage);
+        Assert.Contains(engine.Events, e => e is BoostedEvent { BoosterSlot: 0, AttackerSlot: 3 });
+    }
+
+    [Fact]
+    public void Without_Boost_The_Same_Attack_Misses()
+    {
+        var engine = ReadyToBoost();
+
+        Assert.True(engine.Execute(new AttackCommand(3, -1)).Accepted);
+        Assert.True(engine.Execute(new PassGuardCommand()).Accepted);
+
+        Assert.Empty(engine.State.Players[1].Damage);
+        Assert.False(engine.State.Players[0].RearGuards[0]!.Rested);
+    }
+
+    [Fact]
+    public void Boost_Rejects_Wrong_Column()
+    {
+        var engine = ReadyToBoost();
+
+        var result = engine.Execute(new AttackCommand(3, -1, 2));
+
+        Assert.False(result.Accepted);
+    }
+
+    [Fact]
+    public void Grade_Two_Cannot_Boost()
+    {
+        var engine = ReadyToBoost();
+
+        engine.State.Players[0].RearGuards[0] = TakeFromDeck(engine.State.Players[0], Gallatin);
+
+        var result = engine.Execute(new AttackCommand(3, -1, 0));
+
+        Assert.False(result.Accepted);
+    }
+
+    [Fact]
+    public void Effect_Can_Grant_Boost_To_Grade_Two()
+    {
+        var engine = ReadyToBoost();
+        var booster = TakeFromDeck(engine.State.Players[0], Gallatin);
+        engine.State.Players[0].RearGuards[0] = booster;
+
+        Assert.False(engine.Execute(new AttackCommand(3, -1, 0)).Accepted);
+
+        booster.BoostOverride = true;
+
+        Assert.True(engine.Execute(new AttackCommand(3, -1, 0)).Accepted);
+    }
+
+    [Fact]
+    public void Effect_Can_Remove_Boost_From_Grade_One()
+    {
+        var engine = ReadyToBoost();
+        var booster = engine.State.Players[0].RearGuards[0]!;
+
+        booster.BoostOverride = false;
+
+        Assert.False(engine.Execute(new AttackCommand(3, -1, 0)).Accepted);
+    }
+
     [Fact]
     public void ResolveTrigger_Rejects_When_Nothing_Is_Pending()
     {
@@ -267,6 +339,28 @@ public class GameEngineTests
         return engine;
     }
 
+    private GameEngine ReadyToBoost()
+    {
+        var engine = StartedEngine();
+        Give(engine, 0, Marron);
+        engine.Execute(new RideCommand(Marron));
+
+        // сзади слева — поддержка (1 ранг), впереди слева — атакующий (2 ранг)
+        Give(engine, 0, Marron);
+        engine.Execute(new CallCommand(Marron, 0));
+
+        Give(engine, 0, Gallatin);
+        engine.Execute(new CallCommand(Gallatin, 3));
+
+        // призванные карты входят повёрнутыми — для теста поддержки поднимаем обе
+        engine.State.Players[0].RearGuards[0]!.Rested = false;
+        engine.State.Players[0].RearGuards[3]!.Rested = false;
+
+        SetVanguard(engine, 1, Gallatin);
+        engine.Execute(new EnterBattleCommand());
+        return engine;
+    }
+
     private List<string> BuildDeck()
     {
         var mustInclude = new[] { Barcgal, Marron, Gallatin, Alfred, Nike, Flogal, Govannon };
@@ -329,12 +423,15 @@ public class GameEngineTests
             player.Deck.Insert(0, cards[i]);
     }
 
-    private static CardInstance TakeAnyFromDeck(PlayerState player)
+    private static void SetVanguard(GameEngine engine, int player, string printingId)
     {
-        Assert.NotEmpty(player.Deck);
-        var card = player.Deck[0];
-        player.Deck.RemoveAt(0);
-        return card;
+        var p = engine.State.Players[player];
+        var index = p.Deck.FindIndex(c => c.PrintingId == printingId);
+        Assert.True(index >= 0, $"В колоде нет {printingId}");
+
+        var card = p.Deck[index];
+        p.Deck.RemoveAt(index);
+        p.Vanguard = card;
     }
 
     private static CardInstance TakeFromDeck(PlayerState player, string printingId)
@@ -346,4 +443,12 @@ public class GameEngineTests
         player.Deck.RemoveAt(index);
         return card;
     }
+
+    private static CardInstance TakeAnyFromDeck(PlayerState player)
+    {
+        Assert.NotEmpty(player.Deck);
+        var card = player.Deck[0];
+        player.Deck.RemoveAt(0);
+        return card;
+    }
 }