diff --git a/Random/TTTPlugin.h b/Random/TTTPlugin.h
index dcdc8af..519337d 100644
--- a/Random/TTTPlugin.h
+++ b/Random/TTTPlugin.h
@@ -7,5 +7,5 @@
 	// 既定の関数
 	__declspec(dllexport) bool IsHuman();
 	__declspec(dllexport) void GetName(char* buf, size_t bufsize);
-	__declspec(dllexport) int MyTurn(int* board, int turn, int player);
+	__declspec(dllexport) int MyTurn(int* board);
 }
diff --git a/Random/random.cpp b/Random/random.cpp
index 9916f4f..57ab10c 100644
--- a/Random/random.cpp
+++ b/Random/random.cpp
@@ -22,11 +22,9 @@
 /// <summary>
 /// 手を打つ
 /// </summary>
-/// <param name="board">盤の状態</param>
-/// <param name="turn">ターン数</param>
-/// <param name="player">1:先手, 2:後手</param>
+/// <param name="board">盤の状態（値 1～3は自分駒，-1～-3は相手駒，次置くと1が消える）</param>
 /// <returns>置く場所</returns>
-int MyTurn(int* board, int turn, int player) {
+int MyTurn(int* board) {
 	std::random_device rnd;
 
 	int pos;
diff --git a/TPIHuman/Human.cpp b/TPIHuman/Human.cpp
index 7eaf828..ccdc2a8 100644
--- a/TPIHuman/Human.cpp
+++ b/TPIHuman/Human.cpp
@@ -21,11 +21,9 @@
 /// <summary>
 /// 手を打つ
 /// </summary>
-/// <param name="board">盤の状態</param>
-/// <param name="turn">ターン数</param>
-/// <param name="player">1:先手, 2:後手</param>
+/// <param name="board">盤の状態（値 1～3は自分駒，-1～-3は相手駒，次置くと1が消える）</param>
 /// <returns>置く場所</returns>
-int MyTurn(int* board, int turn, int player) {
+int MyTurn(int* board) {
 
 	int pos = 0;
 	do {
diff --git a/TPIHuman/TTTPlugin.h b/TPIHuman/TTTPlugin.h
index dcdc8af..519337d 100644
--- a/TPIHuman/TTTPlugin.h
+++ b/TPIHuman/TTTPlugin.h
@@ -7,5 +7,5 @@
 	// 既定の関数
 	__declspec(dllexport) bool IsHuman();
 	__declspec(dllexport) void GetName(char* buf, size_t bufsize);
-	__declspec(dllexport) int MyTurn(int* board, int turn, int player);
+	__declspec(dllexport) int MyTurn(int* board);
 }
diff --git a/TTTConsole/Program.cs b/TTTConsole/Program.cs
index 52ebbac..090f18d 100644
--- a/TTTConsole/Program.cs
+++ b/TTTConsole/Program.cs
@@ -17,7 +17,7 @@
         private extern static void GetNameR(StringBuilder s, Int32 bufsize);
 
         [DllImport("TPIRandom.dll", CallingConvention = CallingConvention.Cdecl, EntryPoint = "MyTurn")]
-        private extern static int MyTurnR(IntPtr board, int turn, int player);
+        private extern static int MyTurnR(IntPtr board);
 
         [DllImport("TPIRandom.dll", CallingConvention = CallingConvention.Cdecl, EntryPoint = "IsHuman")]
         private extern static bool IsHumanH();
@@ -26,7 +26,7 @@
         private extern static void GetNameH(StringBuilder s, Int32 bufsize);
 
         [DllImport("TPIHuman.dll", CallingConvention = CallingConvention.Cdecl, EntryPoint = "MyTurn")]
-        private extern static int MyTurnH(IntPtr board, int turn, int player);
+        private extern static int MyTurnH(IntPtr board);
 
 
         static string[] PLAYER_STR = new string[] { "", "先手", "後手" };
@@ -78,10 +78,10 @@
                 switch (thinkers[(int)ttt.Player - 1]) {
                 case 1:
                     Console.WriteLine("");
-                    ttt.Set(MyTurnH(ttt.GetBoard(), ttt.Turn, (int)ttt.Player));
+                    ttt.Set(MyTurnH(ttt.GetBoard()));
                     break;
                 case 2:
-                    ttt.Set(MyTurnR(ttt.GetBoard(), ttt.Turn, (int)ttt.Player));
+                    ttt.Set(MyTurnR(ttt.GetBoard()));
                     if (!IsHumanR()) Console.WriteLine($" --> {ttt.LastSet + 1}");
                     break;
                 }