logic

2026-03-30 07:49:37 +02:00
parent 9440351bc0
commit bc4118704e
21 changed files with 1785 additions and 124 deletions
@@ -0,0 +1,66 @@
+namespace CheckersSpielBot
+{
+    public static class BoardEvaluator
+    {
+        private const int PieceValue = 100;
+        private const int KingValue = 160;
+
+        //Weights (Musst be Balanced To have a good Ai)
+        private const int AdvancementWeight = 5;
+        private const int BackRowWeight = 15;
+        private const int CenterWeight = 10;
+        private const int MobilityWeight = 8;
+
+        public static int Evaluate(int[,] board, int aiPlayer)
+        {
+            int score = 0;
+            int humanPlayer = aiPlayer == 1 ? 2 : 1;
+
+            MoveGeneratorService moveGen = new MoveGeneratorService(board);
+
+            int aiMobility = 0;
+            int humanMobility = 0;
+
+            for (int row = 0; row < 8; row++)
+            {
+                for (int col = 0; col < 8; col++)
+                {
+                    int piece = board[row, col];
+                    if (piece == 0) continue;
+
+                    //Reward For who will play first
+                    bool isAi = BoardHelper.BelongsToPlayer(piece, aiPlayer);
+                    bool isKing = BoardHelper.IsKing(piece);
+
+                    int sign = isAi ? 1 : -1;
+
+                    // Material
+                    score += sign * (isKing ? KingValue : PieceValue);
+
+                    // Advancement — how far the piece has advanced toward promotion
+                    int advancement = isAi ? (aiPlayer == 1 ? 7 - row : row) : (aiPlayer == 1 ? row : 7 - row); // Red moves up, Blue moves down
+
+                    score += sign * advancement * AdvancementWeight;
+
+                    // Back row protection — pieces on starting back row
+                    bool onBackRow = isAi ? (aiPlayer == 1 && row == 7) || (aiPlayer == 2 && row == 0) : (aiPlayer == 1 && row == 0) || (aiPlayer == 2 && row == 7);
+                    if (onBackRow && !isKing) { score += sign * BackRowWeight; }
+
+                    // Center control — [columns:2,3,4,5 && rows:2,3,4,5]
+                    if (col >= 2 && col <= 5 && row >= 2 && row <= 5) { score += sign * CenterWeight; }
+
+                    // Mobility
+                    int moves = moveGen.GetLegalMoves(row, col, capturesOnly: false).Count;
+
+                    if (isAi) { aiMobility += moves; }
+                    else { humanMobility += moves; }
+                }
+            }
+
+            // Mobility difference
+            score += (aiMobility - humanMobility) * MobilityWeight;
+
+            return score;
+        }
+    }
+}