com.fathzer.chess.utils.evaluators.pesto.MiddleGamePieceSquareTable Maven / Gradle / Ivy

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Some helpful piece of code to implement chess engines.
The newest version!
package com.fathzer.chess.utils.evaluators.pesto;

import com.fathzer.chess.utils.evaluators.AbstractPieceSquareTable;

/** The end game piece square table.
 */
public class MiddleGamePieceSquareTable extends AbstractPieceSquareTable {
	private static final int[] PIECE_VALUES = { 0, 82, 337, 365, 477, 1025,  0};
	
	private static final int [][] PIECE_POSITION_VALUES = new int[][] {
		// Just to have index equals to piece type codes
		new int[0],
		//pawn
		new int[] {
	      0,   0,   0,   0,   0,   0,  0,   0,
	     98, 134,  61,  95,  68, 126, 34, -11,
	     -6,   7,  26,  31,  65,  56, 25, -20,
	    -14,  13,   6,  21,  23,  12, 17, -23,
	    -27,  -2,  -5,  12,  17,   6, 10, -25,
	    -26,  -4,  -4, -10,   3,   3, 33, -12,
	    -35,  -1, -20, -23, -15,  24, 38, -22,
	      0,   0,   0,   0,   0,   0,  0,   0},
		//knight
		new int[] {
	    -167, -89, -34, -49,  61, -97, -15, -107,
	     -73, -41,  72,  36,  23,  62,   7,  -17,
	     -47,  60,  37,  65,  84, 129,  73,   44,
	      -9,  17,  19,  53,  37,  69,  18,   22,
	     -13,   4,  16,  13,  28,  19,  21,   -8,
	     -23,  -9,  12,  10,  19,  17,  25,  -16,
	     -29, -53, -12,  -3,  -1,  18, -14,  -19,
	    -105, -21, -58, -33, -17, -28, -19,  -23},
		//bishop
		new int[] {
	    -29,   4, -82, -37, -25, -42,   7,  -8,
	    -26,  16, -18, -13,  30,  59,  18, -47,
	    -16,  37,  43,  40,  35,  50,  37,  -2,
	     -4,   5,  19,  50,  37,  37,   7,  -2,
	     -6,  13,  13,  26,  34,  12,  10,   4,
	      0,  15,  15,  15,  14,  27,  18,  10,
	      4,  15,  16,   0,   7,  21,  33,   1,
	    -33,  -3, -14, -21, -13, -12, -39, -21},
		//rook
		new int[] {
	     32,  42,  32,  51, 63,  9,  31,  43,
	     27,  32,  58,  62, 80, 67,  26,  44,
	     -5,  19,  26,  36, 17, 45,  61,  16,
	    -24, -11,   7,  26, 24, 35,  -8, -20,
	    -36, -26, -12,  -1,  9, -7,   6, -23,
	    -45, -25, -16, -17,  3,  0,  -5, -33,
	    -44, -16, -20,  -9, -1, 11,  -6, -71,
	    -19, -13,   1,  17, 16,  7, -37, -26},
		//queen
		new int[] {
	    -28,   0,  29,  12,  59,  44,  43,  45,
	    -24, -39,  -5,   1, -16,  57,  28,  54,
	    -13, -17,   7,   8,  29,  56,  47,  57,
	    -27, -27, -16, -16,  -1,  17,  -2,   1,
	     -9, -26,  -9, -10,  -2,  -4,   3,  -3,
	    -14,   2, -11,  -2,  -5,   2,  14,   5,
	    -35,  -8,  11,   2,   8,  15,  -3,   1,
	     -1, -18,  -9,  10, -15, -25, -31, -50},
		//king
		new int[] {
	    -65,  23,  16, -15, -56, -34,   2,  13,
	     29,  -1, -20,  -7,  -8,  -4, -38, -29,
	     -9,  24,   2, -16, -20,   6,  22, -22,
	    -17, -20, -12, -27, -30, -25, -14, -36,
	    -49,  -1, -27, -39, -46, -44, -33, -51,
	    -14, -14, -22, -46, -44, -30, -15, -27,
	      1,   7,  -8, -64, -43, -16,   9,   8,
	    -15,  36,  12, -54,   8, -28,  24,  14}
	};
	
	static {
		addPiecesValues(PIECE_POSITION_VALUES, PIECE_VALUES);
	}
	
	/** Constructor.
	 */
	public MiddleGamePieceSquareTable() {
		super();
	}

	@Override
	protected int get(int piece, int index) {
		return PIECE_POSITION_VALUES[piece][index];
	}
}