feat: refactor AlphaBetaSearch and ClassicalBot for improved evaluation and organization

modules/bot/python/export_weights.py

@@ -0,0 +1,64 @@
+#!/usr/bin/env python3
+"""Export NNUE weights to Scala code."""
+
+import torch
+import sys
+from pathlib import Path
+
+def export_weights_to_scala(weights_file, output_file):
+    """Load PyTorch weights and export as Scala code."""
+
+    if not Path(weights_file).exists():
+        print(f"Error: Weights file not found at {weights_file}")
+        sys.exit(1)
+
+    # Load weights (weights_only=False for compatibility with older PyTorch versions)
+    state_dict = torch.load(weights_file, map_location='cpu')
+
+    # Create output directory if needed
+    output_path = Path(output_file)
+    output_path.parent.mkdir(parents=True, exist_ok=True)
+
+    with open(output_file, 'w') as f:
+        f.write("package de.nowchess.bot.bots.nnue\n\n")
+        f.write("object NNUEWeights:\n")
+
+        for layer_name, tensor in sorted(state_dict.items()):
+            # Sanitize name
+            safe_name = layer_name.replace('.', '_').replace(' ', '_')
+
+            # Convert tensor to flat list
+            values = tensor.flatten().tolist()
+
+            # Format as Scala array
+            f.write(f"\n  val {safe_name} = Array(\n")
+
+            # Write values in chunks for readability
+            chunk_size = 16
+            for i in range(0, len(values), chunk_size):
+                chunk = values[i:i + chunk_size]
+                formatted_chunk = ", ".join(f"{v:.10g}f" for v in chunk)
+                f.write(f"    {formatted_chunk}")
+                if i + chunk_size < len(values):
+                    f.write(",\n")
+                else:
+                    f.write("\n")
+
+            f.write(f"  )\n")
+
+            # Store shape for reference
+            shape = list(tensor.shape)
+            f.write(f"  // Shape: {shape}\n")
+
+    print(f"Weights exported to {output_file}")
+
+if __name__ == "__main__":
+    weights_file = "nnue_weights.pt"
+    output_file = "../src/main/scala/de/nowchess/bot/bots/nnue/NNUEWeights.scala"
+
+    if len(sys.argv) > 1:
+        weights_file = sys.argv[1]
+    if len(sys.argv) > 2:
+        output_file = sys.argv[2]
+
+    export_weights_to_scala(weights_file, output_file)