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evaluate.c
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//evaluate.c
#include "stdio.h"
#include "header.h"
const int pawnisolated = -10;
const int pawnpassed[8] = {0, 5, 10, 20, 35, 60, 100, 200};
const int rookopenfile = 10;
const int rooksemiopenfile =5;
const int queenopenfile = 5;
const int queensemiopenfile = 3;
const int bishoppair = 30;
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
};
const int KingE[64] = {
-50 , -10 , 0 , 0 , 0 , 0 , -10 , -50 ,
-10, 0 , 10 , 10 , 10 , 10 , 0 , -10 ,
0 , 10 , 20 , 20 , 20 , 20 , 10 , 0 ,
0 , 10 , 20 , 40 , 40 , 20 , 10 , 0 ,
0 , 10 , 20 , 40 , 40 , 20 , 10 , 0 ,
0 , 10 , 20 , 20 , 20 , 20 , 10 , 0 ,
-10, 0 , 10 , 10 , 10 , 10 , 0 , -10 ,
-50 , -10 , 0 , 0 , 0 , 0 , -10 , -50
};
const int KingO[64] = {
0 , 5 , 5 , -10 , -10 , 0 , 10 , 5 ,
-30 , -30 , -30 , -30 , -30 , -30 , -30 , -30 ,
-50 , -50 , -50 , -50 , -50 , -50 , -50 , -50 ,
-70 , -70 , -70 , -70 , -70 , -70 , -70 , -70 ,
-70 , -70 , -70 , -70 , -70 , -70 , -70 , -70 ,
-70 , -70 , -70 , -70 , -70 , -70 , -70 , -70 ,
-70 , -70 , -70 , -70 , -70 , -70 , -70 , -70 ,
-70 , -70 , -70 , -70 , -70 , -70 , -70 , -70
};
// sjeng 11.2
//8/6R1/2k5/6P1/8/8/4nP2/6K1 w - - 1 41
int materialdraw(const S_BOARD *pos)
{
if (!pos->pceNum[wr] && !pos->pceNum[br] && !pos->pceNum[wq] && !pos->pceNum[bq])
{
if (!pos->pceNum[bb] && !pos->pceNum[wb])
{
if (pos->pceNum[wn] < 3 && pos->pceNum[bn] < 3) { return TRUE; }
}
else if (!pos->pceNum[wn] && !pos->pceNum[bn])
{
if (abs(pos->pceNum[wb] - pos->pceNum[bb]) < 2) { return TRUE; }
}
else if ((pos->pceNum[wn] < 3 && !pos->pceNum[wb]) || (pos->pceNum[wb] == 1 && !pos->pceNum[wn]))
{
if ((pos->pceNum[bn] < 3 && !pos->pceNum[bb]) || (pos->pceNum[bb] == 1 && !pos->pceNum[bn])) { return TRUE; }
}
}
else if (!pos->pceNum[wq] && !pos->pceNum[bq])
{
if (pos->pceNum[wr] == 1 && pos->pceNum[br] == 1)
{
if ((pos->pceNum[wn] + pos->pceNum[wb]) < 2 && (pos->pceNum[bn] + pos->pceNum[bb]) < 2) { return TRUE; }
}
else if (pos->pceNum[wr] == 1 && !pos->pceNum[br])
{
if ((pos->pceNum[wn] + pos->pceNum[wb] == 0) && (((pos->pceNum[bn] + pos->pceNum[bb]) == 1) || ((pos->pceNum[bn] + pos->pceNum[bb]) == 2))) { return TRUE; }
}
else if (pos->pceNum[br] == 1 && !pos->pceNum[wr])
{
if ((pos->pceNum[bn] + pos->pceNum[bb] == 0) && (((pos->pceNum[wn] + pos->pceNum[wb]) == 1) || ((pos->pceNum[wn] + pos->pceNum[wb]) == 2))) { return TRUE; }
}
}
return FALSE;
}
#define ENDGAME_MAT (pieceval[wr] + 2*pieceval[wn] + 2*pieceval[wp])
int evalposition(const S_BOARD *pos)
{
int pce;
int pcenum;
int sq;
int score = pos->material[WHITE] - pos->material[BLACK];
if(!pos->pceNum[wp] && !pos->pceNum[bp] && materialdraw(pos) == TRUE)
return 0;
pce = wp;
for(pcenum =0; pcenum < pos->pceNum[pce]; pcenum++)
{
sq = pos->plist[pce][pcenum];
ASSERT(sqonboard(sq));
score += pawntable[SQ64(sq)];
if((isolatedmask[SQ64(sq)] & pos->pawns[WHITE])==0)
{
//printf("wp Iso:%s\n",prsq(sq));
score += pawnisolated;
}
if((whitepassedmask[SQ64(sq)] & pos->pawns[BLACK])==0)
{
//printf("bp passed: %s\n",prsq(sq));
score += pawnpassed[ranksbrd[sq]];
}
}
pce = bp;
for(pcenum =0; pcenum < pos->pceNum[pce]; pcenum++)
{
sq = pos->plist[pce][pcenum];
ASSERT(sqonboard(sq));
score -= pawntable[mirror64[SQ64(sq)]];
if((isolatedmask[SQ64(sq)] & pos->pawns[BLACK])==0)
{
//printf("bp Iso:%s\n",prsq(sq));
score -= pawnisolated;
}
if((blackpassedmask[SQ64(sq)] & pos->pawns[WHITE])==0)
{
//printf("bp passed: %s\n",prsq(sq));
score -= pawnpassed[7-ranksbrd[sq]];
}
}
pce = wn;
for(pcenum =0; pcenum < pos->pceNum[pce]; pcenum++)
{
sq = pos->plist[pce][pcenum];
ASSERT(sqonboard(sq));
score += knighttable[SQ64(sq)];
}
pce = bn;
for(pcenum =0; pcenum < pos->pceNum[pce]; pcenum++)
{
sq = pos->plist[pce][pcenum];
ASSERT(sqonboard(sq));
score -= knighttable[mirror64[SQ64(sq)]];
}
pce = wr;
for(pcenum =0; pcenum < pos->pceNum[pce]; pcenum++)
{
sq = pos->plist[pce][pcenum];
ASSERT(sqonboard(sq));
score += rooktable[SQ64(sq)];
if(!(pos->pawns[BOTH] & filebbmask[filesbrd[sq]]))
score += rookopenfile;
else if(!(pos->pawns[WHITE] & filebbmask[filesbrd[sq]]))
score +=rooksemiopenfile;
}
pce = br;
for(pcenum =0; pcenum < pos->pceNum[pce]; pcenum++)
{
sq = pos->plist[pce][pcenum];
ASSERT(sqonboard(sq));
score -= rooktable[mirror64[SQ64(sq)]];
if(!(pos->pawns[BOTH] & filebbmask[filesbrd[sq]]))
score -= rookopenfile;
else if(!(pos->pawns[BLACK] & filebbmask[filesbrd[sq]]))
score -=rooksemiopenfile;
}
pce = wb;
for(pcenum =0; pcenum < pos->pceNum[pce]; pcenum++)
{
sq = pos->plist[pce][pcenum];
ASSERT(sqonboard(sq));
score += bishoptable[SQ64(sq)];
}
pce = bb;
for(pcenum =0; pcenum < pos->pceNum[pce]; pcenum++)
{
sq = pos->plist[pce][pcenum];
ASSERT(sqonboard(sq));
score -= bishoptable[mirror64[SQ64(sq)]];
}
pce =wq;
for(pcenum=0;pcenum < pos->pceNum[pce];pcenum++)
{
sq= pos->plist[pce][pcenum];
ASSERT(sqonboard(sq));
if(!(pos->pawns[BOTH] & filebbmask[filesbrd[sq]]))
score += queenopenfile;
else if(!(pos->pawns[WHITE] & filebbmask[filesbrd[sq]]))
score += queensemiopenfile;
}
pce =bq;
for(pcenum=0;pcenum < pos->pceNum[pce];pcenum++)
{
sq= pos->plist[pce][pcenum];
ASSERT(sqonboard(sq));
if(!(pos->pawns[BOTH] & filebbmask[filesbrd[sq]]))
score -= queenopenfile;
else if(!(pos->pawns[BLACK] & filebbmask[filesbrd[sq]]))
score -= queensemiopenfile;
}
pce =wk;
sq= pos->plist[pce][0];
ASSERT(sqonboard(sq));
ASSERT(SQ64(sq) >= 0 && SQ64(sq) <=63);
if((pos->material[BLACK] <= ENDGAME_MAT))
score += KingE[SQ64(sq)];
else
score += KingO[SQ64(sq)];
pce =bk;
sq = pos->plist[pce][0];
ASSERT(sqonboard(sq));
ASSERT(SQ64(sq) >= 0 && SQ64(sq) <=63);
if((pos->material[WHITE] <= ENDGAME_MAT))
score -= KingE[mirror64[SQ64(sq)]];
else
score -= KingO[mirror64[SQ64(sq)]];
if(pos->pceNum[wb] >= 2) score += bishoppair;
if(pos->pceNum[bb] >= 2) score -= bishoppair;
if(pos->side == WHITE)
return score;
else
return -score;
return 0;
}