evaluate.c

#include "def.h"
#include <stdio.h>

const int PawnTable[64] = {0,  0,  0,  0,  0,  0,  0,  0,  10, 10, 0,  -10, -10, 0,  10, 10, 5, 0, 0,  5,  5,  0,
                           0,  5,  0,  0,  10, 20, 20, 10, 0,  0,  5,  5,   5,   10, 10, 5,  5, 5, 10, 10, 10, 20,
                           20, 10, 10, 10, 20, 20, 20, 30, 30, 20, 20, 20,  0,   0,  0,  0,  0, 0, 0,  0};

const int KnightTable[64] = {0,  -10, 0,  0, 0,  0,  -10, 0,  0,  0, 0, 5,  5,  0,  0,  0,  0,  0, 10, 10, 10, 10,
                             0,  0,   0,  0, 10, 20, 20,  10, 5,  0, 5, 10, 15, 20, 20, 15, 10, 5, 5,  10, 10, 20,
                             20, 10,  10, 5, 0,  0,  5,   10, 10, 5, 0, 0,  0,  0,  0,  0,  0,  0, 0,  0};

const int BishopTable[64] = {0,  0,  -10, 0,  0,  -10, 0,  0,  0,  0, 0, 10, 10, 0,  0,  0,  0,  0, 10, 15, 15, 10,
                             0,  0,  0,   10, 15, 20,  20, 15, 10, 0, 0, 10, 15, 20, 20, 15, 10, 0, 0,  0,  10, 15,
                             15, 10, 0,   0,  0,  0,   0,  10, 10, 0, 0, 0,  0,  0,  0,  0,  0,  0, 0,  0};

const int RookTable[64] = {0,  0, 5, 10, 10, 5,  0,  0,  0,  0,  5,  10, 10, 5,  0,  0,  0,  0, 5, 10, 10, 5,
                           0,  0, 0, 0,  5,  10, 10, 5,  0,  0,  0,  0,  5,  10, 10, 5,  0,  0, 0, 0,  5,  10,
                           10, 5, 0, 0,  25, 25, 25, 25, 25, 25, 25, 25, 0,  0,  5,  10, 10, 5, 0, 0};

const int Mirror64[64] = {56, 57, 58, 59, 60, 61, 62, 63, 48, 49, 50, 51, 52, 53, 54, 55, 40, 41, 42, 43, 44, 45,
                          46, 47, 32, 33, 34, 35, 36, 37, 38, 39, 24, 25, 26, 27, 28, 29, 30, 31, 16, 17, 18, 19,
                          20, 21, 22, 23, 8,  9,  10, 11, 12, 13, 14, 15, 0,  1,  2,  3,  4,  5,  6,  7};

#define MIRROR64(sq) (Mirror64[(sq)])

int EvalPos(BOARD* pos)
{
    int pce;
    int pceNum;
    int sq = 0;
    int score = pos->ValPce[WHITE] - pos->ValPce[BLACK];

    pce = wP;
    for (pceNum = 0; pceNum < pos->PceNum[pce]; ++pceNum)
    {
        sq = pos->PceList[pce][pceNum];
        score += PawnTable[sq120to64[sq]];
    }

    pce = bP;
    for (pceNum = 0; pceNum < pos->PceNum[pce]; ++pceNum)
    {
        sq = pos->PceList[pce][pceNum];
        score -= PawnTable[MIRROR64(sq120to64[sq])];
    }

    pce = wN;
    for (pceNum = 0; pceNum < pos->PceNum[pce]; ++pceNum)
    {
        sq = pos->PceList[pce][pceNum];
        score += KnightTable[sq120to64[sq]];
    }

    pce = bN;
    for (pceNum = 0; pceNum < pos->PceNum[pce]; ++pceNum)
    {
        sq = pos->PceList[pce][pceNum];
        score -= KnightTable[MIRROR64(sq120to64[sq])];
    }

    pce = wB;
    for (pceNum = 0; pceNum < pos->PceNum[pce]; ++pceNum)
    {
        sq = pos->PceList[pce][pceNum];
        score += BishopTable[sq120to64[sq]];
    }

    pce = bB;
    for (pceNum = 0; pceNum < pos->PceNum[pce]; ++pceNum)
    {
        sq = pos->PceList[pce][pceNum];
        score -= BishopTable[MIRROR64(sq120to64[sq])];
    }

    pce = wR;
    for (pceNum = 0; pceNum < pos->PceNum[pce]; ++pceNum)
    {
        sq = pos->PceList[pce][pceNum];
        score += RookTable[sq120to64[sq]];
    }

    pce = bR;
    for (pceNum = 0; pceNum < pos->PceNum[pce]; ++pceNum)
    {
        sq = pos->PceList[pce][pceNum];
        score -= RookTable[MIRROR64(sq120to64[sq])];
    }

    if (pos->Side == WHITE)
    {
        return score;
    }
    else
    {
        return -score;
    }
}