diff --git a/src/main/scala/scatan/model/game/ScatanEffects.scala b/src/main/scala/scatan/model/game/ScatanEffects.scala
index cdacacd..1f8532e 100644
--- a/src/main/scala/scatan/model/game/ScatanEffects.scala
+++ b/src/main/scala/scatan/model/game/ScatanEffects.scala
@@ -9,7 +9,7 @@ import scatan.model.game.state.ops.BuildingOps.{assignBuilding, build}
 import scatan.model.game.state.ops.DevelopmentCardOps.*
 import scatan.model.game.state.ops.ResourceCardOps.*
 import scatan.model.game.state.ops.RobberOps.moveRobber
-import scatan.model.game.state.ops.TradeOps.{tradeWithBank, tradeWithPlayer}
+import scatan.model.game.state.ops.TradeOps.{tradeWithBank, tradeBetweenPlayers}
 import scatan.model.map.{Hexagon, RoadSpot, StructureSpot}
 
 object ScatanEffects:
@@ -249,4 +249,4 @@ object ScatanEffects:
       senderCards: Seq[ResourceCard],
       receiverCards: Seq[ResourceCard]
   ): Effect[TradeWithPlayer.type, ScatanState] =
-    (state: ScatanState) => state.tradeWithPlayer(sender, receiver, senderCards, receiverCards)
+    (state: ScatanState) => state.tradeBetweenPlayers(sender, receiver, senderCards, receiverCards)
diff --git a/src/main/scala/scatan/model/game/state/ops/DevelopmentCardOps.scala b/src/main/scala/scatan/model/game/state/ops/DevelopmentCardOps.scala
index 0bb0f9e..4a4fbbf 100644
--- a/src/main/scala/scatan/model/game/state/ops/DevelopmentCardOps.scala
+++ b/src/main/scala/scatan/model/game/state/ops/DevelopmentCardOps.scala
@@ -15,6 +15,8 @@ import scatan.model.map.{Hexagon, RoadSpot}
   */
 object DevelopmentCardOps:
 
+  type DevelopmentCardEffect = ScatanState => Option[ScatanState]
+
   extension (state: ScatanState)
     /** Returns a new ScatanState with the given development card assigned to the given player. The development card is
       * added to the player's list of development cards. The assigned awards are updated.
@@ -115,7 +117,7 @@ object DevelopmentCardOps:
         player: ScatanPlayer,
         developmentType: DevelopmentType,
         turnNumber: Int
-    )(effect: ScatanState => Option[ScatanState]): Option[ScatanState] =
+    )(effect: DevelopmentCardEffect): Option[ScatanState] =
       val stateWithCardConsumed = for
         developmentCards <- state.developmentCards.get(player)
         card <- developmentCards.find(card =>
diff --git a/src/main/scala/scatan/model/game/state/ops/TradeOps.scala b/src/main/scala/scatan/model/game/state/ops/TradeOps.scala
index d5d2212..889d33c 100644
--- a/src/main/scala/scatan/model/game/state/ops/TradeOps.scala
+++ b/src/main/scala/scatan/model/game/state/ops/TradeOps.scala
@@ -11,7 +11,7 @@ object TradeOps:
   val tradeWithBankRequiredCards = 4
   extension (state: ScatanState)
 
-    /** Trade with a player. The sender must have the senderCards and the receiver must have the receiverCards The
+    /** Trade between two players. The sender must have the senderCards and the receiver must have the receiverCards The
       * sender will give the senderCards to the receiver and vice versa
       *
       * @param sender
@@ -25,7 +25,7 @@ object TradeOps:
       * @return
       *   Some(state) if the trade is allowed, None otherwise
       */
-    def tradeWithPlayer(
+    def tradeBetweenPlayers(
         sender: ScatanPlayer,
         receiver: ScatanPlayer,
         senderCards: Seq[ResourceCard],
diff --git a/src/test/scala/scatan/model/game/state/ops/TradeOpsTest.scala b/src/test/scala/scatan/model/game/state/ops/TradeOpsTest.scala
index 7473e67..d053a09 100644
--- a/src/test/scala/scatan/model/game/state/ops/TradeOpsTest.scala
+++ b/src/test/scala/scatan/model/game/state/ops/TradeOpsTest.scala
@@ -4,7 +4,7 @@ import scatan.model.components.*
 import scatan.model.game.BaseScatanStateTest
 import scatan.model.game.state.ScatanState
 import scatan.model.game.state.ops.ResourceCardOps.assignResourceCard
-import scatan.model.game.state.ops.TradeOps.{tradeWithBank, tradeWithPlayer}
+import scatan.model.game.state.ops.TradeOps.{tradeWithBank, tradeBetweenPlayers}
 
 class TradeOpsTest extends BaseScatanStateTest:
 
@@ -19,7 +19,7 @@ class TradeOpsTest extends BaseScatanStateTest:
     stateWithResourceAssigned match
       case Some(stateWithResourceAssigned) =>
         val stateWithTrade =
-          stateWithResourceAssigned.tradeWithPlayer(
+          stateWithResourceAssigned.tradeBetweenPlayers(
             sender,
             receiver,
             Seq(ResourceCard(ResourceType.Wood), ResourceCard(ResourceType.Wood)),
@@ -49,7 +49,12 @@ class TradeOpsTest extends BaseScatanStateTest:
         state.resourceCards(sender) should be(Seq(ResourceCard(ResourceType.Wood)))
         state.resourceCards(receiver) should be(Seq(ResourceCard(ResourceType.Brick)))
         val stateWithTrade =
-          state.tradeWithPlayer(sender, receiver, Seq(ResourceCard(ResourceType.Brick)), state.resourceCards(receiver))
+          state.tradeBetweenPlayers(
+            sender,
+            receiver,
+            Seq(ResourceCard(ResourceType.Brick)),
+            state.resourceCards(receiver)
+          )
         stateWithTrade should be(None)
       case None => fail("Resources not assigned")
   }
@@ -66,7 +71,7 @@ class TradeOpsTest extends BaseScatanStateTest:
     stateWithResourceAssigned match
       case Some(state) =>
         val stateWithTrade =
-          state.tradeWithPlayer(
+          state.tradeBetweenPlayers(
             sender,
             receiver,
             Seq(ResourceCard(ResourceType.Wood)),