diff --git a/TTTConsole/Program.cs b/TTTConsole/Program.cs
index 20130c9..9e0f9b3 100644
--- a/TTTConsole/Program.cs
+++ b/TTTConsole/Program.cs
@@ -32,6 +32,7 @@
         static string[] PLAYER_STR = new string[] { "", "先手", "後手" };
         static string[] PLAYER_MARK = new string[] { "　", "○", "×" };
         static string[] names;
+        static int[] thinkers;
         static bool showNumber = false;
 
         /// <summary>
@@ -49,7 +50,6 @@
             // プラグイン名の取得
             System.Text.StringBuilder sb = new System.Text.StringBuilder(256);
             names = new string[2];
-            //var names = new List<string>();
             GetNameH(sb, sb.Capacity);
             names[0] = sb.ToString();
             GetNameR(sb, sb.Capacity);
@@ -57,7 +57,7 @@
 
             // プレイヤーの選択
             Console.WriteLine("プレイヤーの選択");
-            var thinkers = new int[ttt.PLAYERS];
+            thinkers = new int[ttt.PLAYERS];
             for (var pl=0; pl< ttt.PLAYERS; pl++) {
                 for (var i = 0; i < names.Length; i++) {
                     Console.WriteLine($"({i + 1}) {names[i]}");
@@ -67,6 +67,7 @@
 
                 if (!int.TryParse(input, out thinkers[pl])) return;
                 if (thinkers[pl] < 1 || thinkers[pl] > names.Length) return;
+                --thinkers[pl];
             }
 
             // 数字表示の選択
@@ -81,11 +82,11 @@
                 Console.Write($"{PlayerStr(ttt.Player)} の番");
 
                 switch (thinkers[(int)ttt.Player - 1]) {
-                case 1:
+                case 0:
                     Console.WriteLine("");
                     ttt.Set(MyTurnH(ttt.GetBoard()));
                     break;
-                case 2:
+                case 1:
                     ttt.Set(MyTurnR(ttt.GetBoard()));
                     if (!IsHumanR()) Console.WriteLine($" --> {ttt.LastSet + 1}");
                     break;
@@ -125,12 +126,13 @@
         static void ShowBoard(TicTacToe ttt) {
             Console.WriteLine(new string('~', 6) + $" ターン{ttt.Turn} " + new string('~', 6));
 
+            var flip = ttt.Player == PLAYER.Second ? -1 : 1;
             for (var row = 0; row < ttt.BOARD_ROWS; row++) {
                 Console.Write("    ");
                 for (var col = 0; col < ttt.BOARD_COLS; col++) {
                     var pos = row * ttt.BOARD_COLS + col;
-                    var pIdx = ttt.Board[pos] > 0 ? PLAYER.First :
-                        ttt.Board[pos] < 0 ? PLAYER.Second : PLAYER.None;
+                    var pIdx = ttt.Board[pos] * flip > 0 ? PLAYER.First :
+                        ttt.Board[pos] * flip < 0 ? PLAYER.Second : PLAYER.None;
                     Console.Write(PLAYER_MARK[(int)pIdx]);
                     if (showNumber) Console.Write(ttt.Board[pos] == 0 ? "  " : 
                         string.Format("{0,2}", Math.Abs(ttt.Board[pos])));
@@ -150,7 +152,7 @@
         /// <param name="p">プレイヤー</param>
         /// <returns>表示文字列</returns>
         static string PlayerStr(PLAYER p) {
-            return $"{PLAYER_STR[(int)p]}（{names[(int)p - 1]}）";
+            return $"{PLAYER_STR[(int)p]}（{names[thinkers[(int)p - 1]]}）";
         }
     }
 }
diff --git a/TTTConsole/TicTacToe.cs b/TTTConsole/TicTacToe.cs
index 9626bf3..c49d2bf 100644
--- a/TTTConsole/TicTacToe.cs
+++ b/TTTConsole/TicTacToe.cs
@@ -23,7 +23,7 @@
         public readonly int PLAYERS = 2;            // プレイヤー数
         public readonly int TURN_LIMIT;             // ターン数上限（このターン数に至ると引き分け）
         public readonly int NONE = 0;               // 空のマス
-        public readonly int[] SIGN;                 // プレイヤーの符号
+        //public readonly int[] SIGN;                 // プレイヤーの符号
         public readonly int[,] LINES;               // 並べる線の情報
 
         public int[] Board { get; private set; }    // 盤 0:空 正:先手駒 負:後手駒
@@ -41,7 +41,7 @@
         public TicTacToe(int turnLimit = 100) {
             TURN_LIMIT = turnLimit;
             Board = new int[BOARD_SIZE];
-            SIGN = new int[] { 0, 1, -1 };
+            //SIGN = new int[] { 0, 1, -1 };
             LINES = new int[8, 3]{ { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 },
                 { 0, 3, 6 }, { 1, 4, 7 }, { 2, 5, 8 }, { 0, 4, 8 }, { 2, 4, 6 } };
             _board = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof(int)) * BOARD_SIZE);
@@ -86,19 +86,16 @@
             }
 
             // 盤の更新
-            Board[pos] = Turn * SIGN[(int)Player];
             if (Turn > REMAIN_PIECES) {
-                var remove = (Turn - REMAIN_PIECES) * SIGN[(int)Player];
-                for (var i = 0; i < BOARD_SIZE; i++) {
-                    if (Board[i] == remove) Board[i] = NONE;
-                }
+                for (var i = 0; i < BOARD_SIZE; i++) if (Board[i] > 0) --Board[i];
+                Board[pos] = REMAIN_PIECES;
+            } else {
+                Board[pos] = Turn;
             }
 
             // 勝利判定
             for (var i = 0; i < LINES.GetLength(0); i++) {
-                if (Board[LINES[i, 0]] * SIGN[(int)Player] > 0 &&
-                    Board[LINES[i, 1]] * SIGN[(int)Player] > 0 &&
-                    Board[LINES[i, 2]] * SIGN[(int)Player] > 0) {
+                if (Board[LINES[i, 0]] > 0 && Board[LINES[i, 1]] > 0 && Board[LINES[i, 2]] > 0) {
                     Winner = Player;
                     Judge = JUDGE.WIN;
                     return;
@@ -115,10 +112,20 @@
                     return;
                 }
             }
+            FlipBoard();
             return;
         }
 
         /// <summary>
+        /// 盤の値を反転
+        /// </summary>
+        private void FlipBoard() {
+            for (var i = 0; i < BOARD_SIZE; i++) {
+                Board[i] = -Board[i];
+            }
+        }
+
+        /// <summary>
         /// アンマネージドメモリの盤データを取得
         /// </summary>
         /// <returns></returns>