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'''[[Main Page|Home]] * [[Evaluation]] * PeSTO's Evaluation Function'''
'''PeSTO's Evaluation Function''',<br/>
a [[Piece-Square Tables|Piece-Square Tables Only]] evaluation function by [[Ronald Friederich]] as tried in his chess engine [[RofChade]] <ref>[http://www.talkchess.com/forum3/viewtopic.php?f=2&t=68311&start=19 Re: New uci engine: Rofchade] by [[Ronald Friederich]], [[CCC]], Auguat 28, 2018</ref> further used in his experimental chess engine [[PeSTO]].
It performs a [[Tapered Eval|tapered eval]] to interpolate by current [[Game Phases|game stage]] between [[Piece-Square Tables|piece-sq tables]] values for [[Opening|opening]] and [[Endgame|endgame]],
optimized by [[Texel's Tuning Method|Texel's tuning method]]. Pesto's Evaluation Function is intended to replace [[Tomasz Michniewski|Tomasz Michniewski's]] [[Simplified Evaluation Function]], and was successfully applied in several engines.
[[Maksim Korzh]] used and adapted Pesto's Evaluation Function in [[Wukong JS]] along with his own Texel's tuning trials <ref>[http://www.talkchess.com/forum3/viewtopic.php?f=7&t=76238&start=15 Re: Help with Texel's tuning] by [[Maksim Korzh]], [[CCC]], January 07, 2021</ref>.
[[Pawel Koziol]] gave [[TSCP]] by [[Tom Kerrigan]] <ref>[http://www.tckerrigan.com/Chess/TSCP/Community/ Community - Tom Kerrigan's Home Page]</ref>,
an 200 Elo boost with Pesto's Evaluation Function <ref>[https://prodeo.actieforum.com/t252-little-fun-with-tscp little fun with TSCP] by [[Pawel Koziol|nescitus]], [[Computer Chess Forums|ProDeo Forum]], February 12, 2021</ref>, further tried by [[Ed Schroder|Ed Schröder]] in [[ProDeo]] <ref>[http://www.talkchess.com/forum3/viewtopic.php?f=2&t=76643 ProDeo 3.1 - The PESTO version] by [[Ed Schroder|Ed Schröder]], [[CCC]], February 19, 2021</ref>.
=Source Code=
'''PeSTO's Evaluation Function''' based on [[Pawel Koziol|Pawel Koziol's]] implementation in [[TSCP]] by [[Tom Kerrigan]] <ref>[http://www.tckerrigan.com/Chess/TSCP/Community/ Community - Tom Kerrigan's Home Page]</ref>
<pre>
#define PAWN 0
#define KNIGHT 1
#define BISHOP 2
#define ROOK 3
#define QUEEN 4
#define KING 5
/* board representation */
#define WHITE 0
#define BLACK 1
#define WHITE_PAWN (2*PAWN + WHITE)
#define BLACK_PAWN (2*PAWN + BLACK)
#define WHITE_KNIGHT (2*KNIGHT + WHITE)
#define BLACK_KNIGHT (2*KNIGHT + BLACK)
#define WHITE_BISHOP (2*BISHOP + WHITE)
#define BLACK_BISHOP (2*BISHOP + BLACK)
#define WHITE_ROOK (2*ROOK + WHITE)
#define BLACK_ROOK (2*ROOK + BLACK)
#define WHITE_QUEEN (2*QUEEN + WHITE)
#define BLACK_QUEEN (2*QUEEN + BLACK)
#define WHITE_KING (2*KING + WHITE)
#define BLACK_KING (2*KING + BLACK)
#define EMPTY (BLACK_KING + 1)
#define PCOLOR(p) ((p)&1)
int side2move;
int board[64];
#define FLIP(sq) ((sq)^56)
#define OTHER(side) ((side)^ 1)
int mg_value[6] = { 82, 337, 365, 477, 1025, 0};
int eg_value[6] = { 94, 281, 297, 512, 936, 0};
/* piece/sq tables */
/* values from Rofchade: http://www.talkchess.com/forum3/viewtopic.php?f=2&t=68311&start=19 */
int mg_pawn_table[64] = {
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,
};
int eg_pawn_table[64] = {
0, 0, 0, 0, 0, 0, 0, 0,
178, 173, 158, 134, 147, 132, 165, 187,
94, 100, 85, 67, 56, 53, 82, 84,
32, 24, 13, 5, -2, 4, 17, 17,
13, 9, -3, -7, -7, -8, 3, -1,
4, 7, -6, 1, 0, -5, -1, -8,
13, 8, 8, 10, 13, 0, 2, -7,
0, 0, 0, 0, 0, 0, 0, 0,
};
int mg_knight_table[64] = {
-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,
};
int eg_knight_table[64] = {
-58, -38, -13, -28, -31, -27, -63, -99,
-25, -8, -25, -2, -9, -25, -24, -52,
-24, -20, 10, 9, -1, -9, -19, -41,
-17, 3, 22, 22, 22, 11, 8, -18,
-18, -6, 16, 25, 16, 17, 4, -18,
-23, -3, -1, 15, 10, -3, -20, -22,
-42, -20, -10, -5, -2, -20, -23, -44,
-29, -51, -23, -15, -22, -18, -50, -64,
};
int mg_bishop_table[64] = {
-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,
};
int eg_bishop_table[64] = {
-14, -21, -11, -8, -7, -9, -17, -24,
-8, -4, 7, -12, -3, -13, -4, -14,
2, -8, 0, -1, -2, 6, 0, 4,
-3, 9, 12, 9, 14, 10, 3, 2,
-6, 3, 13, 19, 7, 10, -3, -9,
-12, -3, 8, 10, 13, 3, -7, -15,
-14, -18, -7, -1, 4, -9, -15, -27,
-23, -9, -23, -5, -9, -16, -5, -17,
};
int mg_rook_table[64] = {
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,
};
int eg_rook_table[64] = {
13, 10, 18, 15, 12, 12, 8, 5,
11, 13, 13, 11, -3, 3, 8, 3,
7, 7, 7, 5, 4, -3, -5, -3,
4, 3, 13, 1, 2, 1, -1, 2,
3, 5, 8, 4, -5, -6, -8, -11,
-4, 0, -5, -1, -7, -12, -8, -16,
-6, -6, 0, 2, -9, -9, -11, -3,
-9, 2, 3, -1, -5, -13, 4, -20,
};
int mg_queen_table[64] = {
-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,
};
int eg_queen_table[64] = {
-9, 22, 22, 27, 27, 19, 10, 20,
-17, 20, 32, 41, 58, 25, 30, 0,
-20, 6, 9, 49, 47, 35, 19, 9,
3, 22, 24, 45, 57, 40, 57, 36,
-18, 28, 19, 47, 31, 34, 39, 23,
-16, -27, 15, 6, 9, 17, 10, 5,
-22, -23, -30, -16, -16, -23, -36, -32,
-33, -28, -22, -43, -5, -32, -20, -41,
};
int mg_king_table[64] = {
-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,
};
int eg_king_table[64] = {
-74, -35, -18, -18, -11, 15, 4, -17,
-12, 17, 14, 17, 17, 38, 23, 11,
10, 17, 23, 15, 20, 45, 44, 13,
-8, 22, 24, 27, 26, 33, 26, 3,
-18, -4, 21, 24, 27, 23, 9, -11,
-19, -3, 11, 21, 23, 16, 7, -9,
-27, -11, 4, 13, 14, 4, -5, -17,
-53, -34, -21, -11, -28, -14, -24, -43
};
int* mg_pesto_table[6] =
{
mg_pawn_table,
mg_knight_table,
mg_bishop_table,
mg_rook_table,
mg_queen_table,
mg_king_table
};
int* eg_pesto_table[6] =
{
eg_pawn_table,
eg_knight_table,
eg_bishop_table,
eg_rook_table,
eg_queen_table,
eg_king_table
};
int gamephaseInc[12] = {0,0,1,1,1,1,2,2,4,4,0,0};
int mg_table[12][64];
int eg_table[12][64];
void init_tables()
{
int pc, p, sq;
for (p = PAWN, pc = WHITE_PAWN; p <= KING; pc += 2, p++) {
for (sq = 0; sq < 64; sq++) {
mg_table[pc] [sq] = mg_value[p] + mg_pesto_table[p][sq];
eg_table[pc] [sq] = eg_value[p] + eg_pesto_table[p][sq];
mg_table[pc+1][sq] = mg_value[p] + mg_pesto_table[p][FLIP(sq)];
eg_table[pc+1][sq] = eg_value[p] + eg_pesto_table[p][FLIP(sq)];
}
}
}
int eval()
{
int mg[2];
int eg[2];
int gamePhase = 0;
mg[WHITE] = 0;
mg[BLACK] = 0;
eg[WHITE] = 0;
eg[BLACK] = 0;
/* evaluate each piece */
for (int sq = 0; sq < 64; ++sq) {
int pc = board[sq];
if (pc != EMPTY) {
mg[PCOLOR(pc)] += mg_table[pc][sq];
eg[PCOLOR(pc)] += eg_table[pc][sq];
gamePhase += gamephaseInc[pc];
}
}
/* tapered eval */
int mgScore = mg[side2move] - mg[OTHER(side2move)];
int egScore = eg[side2move] - eg[OTHER(side2move)];
int mgPhase = gamePhase;
if (mgPhase > 24) mgPhase = 24; /* in case of early promotion */
int egPhase = 24 - mgPhase;
return (mgScore * mgPhase + egScore * egPhase) / 24;
}
</pre>
=See also=
* [[PeSTO]]
* [[ProDeo]]
* [[RofChade]]
* [[Simplified Evaluation Function]]
* [[TSCP]]
* [[Wukong JS]]
=Forum Posts=
* [http://www.talkchess.com/forum3/viewtopic.php?f=2&t=68311&start=19 Re: New uci engine: Rofchade] by [[Ronald Friederich]], [[CCC]], Auguat 28, 2018
* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=76238&start=15 Re: Help with Texel's tuning] by [[Maksim Korzh]], [[CCC]], January 07, 2021
* [https://prodeo.actieforum.com/t252-little-fun-with-tscp little fun with TSCP] by [[Pawel Koziol|nescitus]], [[Computer Chess Forums|ProDeo Forum]], February 12, 2021
* [https://prodeo.actieforum.com/t274-prodeo-3-1-the-pesto-version ProDeo 3.1 - The PESTO versionn] by [[Ed Schroder|Ed Schröder]], [[Computer Chess Forums|ProDeo Forum]], February 19, 2021
* [http://www.talkchess.com/forum3/viewtopic.php?f=2&t=76643 ProDeo 3.1 - The PESTO version] by [[Ed Schroder|Ed Schröder]], [[CCC]], February 19, 2021
=External Links=
* [https://rofchade.nl/?p=307 PeSTO: Piece Square Tables Only – RofChade]
* [https://github.com/maksimKorzh/wukongJS/blob/main/wukong.js#L897 wukongJS/wukong.js at main · maksimKorzh/wukongJS · GitHub] by [[Maksim Korzh]]
* [http://www.tckerrigan.com/Chess/TSCP/Community/ Community - Tom Kerrigan's Home Page]
'''[[Evaluation|Up one Level]]'''
'''PeSTO's Evaluation Function''',<br/>
a [[Piece-Square Tables|Piece-Square Tables Only]] evaluation function by [[Ronald Friederich]] as tried in his chess engine [[RofChade]] <ref>[http://www.talkchess.com/forum3/viewtopic.php?f=2&t=68311&start=19 Re: New uci engine: Rofchade] by [[Ronald Friederich]], [[CCC]], Auguat 28, 2018</ref> further used in his experimental chess engine [[PeSTO]].
It performs a [[Tapered Eval|tapered eval]] to interpolate by current [[Game Phases|game stage]] between [[Piece-Square Tables|piece-sq tables]] values for [[Opening|opening]] and [[Endgame|endgame]],
optimized by [[Texel's Tuning Method|Texel's tuning method]]. Pesto's Evaluation Function is intended to replace [[Tomasz Michniewski|Tomasz Michniewski's]] [[Simplified Evaluation Function]], and was successfully applied in several engines.
[[Maksim Korzh]] used and adapted Pesto's Evaluation Function in [[Wukong JS]] along with his own Texel's tuning trials <ref>[http://www.talkchess.com/forum3/viewtopic.php?f=7&t=76238&start=15 Re: Help with Texel's tuning] by [[Maksim Korzh]], [[CCC]], January 07, 2021</ref>.
[[Pawel Koziol]] gave [[TSCP]] by [[Tom Kerrigan]] <ref>[http://www.tckerrigan.com/Chess/TSCP/Community/ Community - Tom Kerrigan's Home Page]</ref>,
an 200 Elo boost with Pesto's Evaluation Function <ref>[https://prodeo.actieforum.com/t252-little-fun-with-tscp little fun with TSCP] by [[Pawel Koziol|nescitus]], [[Computer Chess Forums|ProDeo Forum]], February 12, 2021</ref>, further tried by [[Ed Schroder|Ed Schröder]] in [[ProDeo]] <ref>[http://www.talkchess.com/forum3/viewtopic.php?f=2&t=76643 ProDeo 3.1 - The PESTO version] by [[Ed Schroder|Ed Schröder]], [[CCC]], February 19, 2021</ref>.
=Source Code=
'''PeSTO's Evaluation Function''' based on [[Pawel Koziol|Pawel Koziol's]] implementation in [[TSCP]] by [[Tom Kerrigan]] <ref>[http://www.tckerrigan.com/Chess/TSCP/Community/ Community - Tom Kerrigan's Home Page]</ref>
<pre>
#define PAWN 0
#define KNIGHT 1
#define BISHOP 2
#define ROOK 3
#define QUEEN 4
#define KING 5
/* board representation */
#define WHITE 0
#define BLACK 1
#define WHITE_PAWN (2*PAWN + WHITE)
#define BLACK_PAWN (2*PAWN + BLACK)
#define WHITE_KNIGHT (2*KNIGHT + WHITE)
#define BLACK_KNIGHT (2*KNIGHT + BLACK)
#define WHITE_BISHOP (2*BISHOP + WHITE)
#define BLACK_BISHOP (2*BISHOP + BLACK)
#define WHITE_ROOK (2*ROOK + WHITE)
#define BLACK_ROOK (2*ROOK + BLACK)
#define WHITE_QUEEN (2*QUEEN + WHITE)
#define BLACK_QUEEN (2*QUEEN + BLACK)
#define WHITE_KING (2*KING + WHITE)
#define BLACK_KING (2*KING + BLACK)
#define EMPTY (BLACK_KING + 1)
#define PCOLOR(p) ((p)&1)
int side2move;
int board[64];
#define FLIP(sq) ((sq)^56)
#define OTHER(side) ((side)^ 1)
int mg_value[6] = { 82, 337, 365, 477, 1025, 0};
int eg_value[6] = { 94, 281, 297, 512, 936, 0};
/* piece/sq tables */
/* values from Rofchade: http://www.talkchess.com/forum3/viewtopic.php?f=2&t=68311&start=19 */
int mg_pawn_table[64] = {
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,
};
int eg_pawn_table[64] = {
0, 0, 0, 0, 0, 0, 0, 0,
178, 173, 158, 134, 147, 132, 165, 187,
94, 100, 85, 67, 56, 53, 82, 84,
32, 24, 13, 5, -2, 4, 17, 17,
13, 9, -3, -7, -7, -8, 3, -1,
4, 7, -6, 1, 0, -5, -1, -8,
13, 8, 8, 10, 13, 0, 2, -7,
0, 0, 0, 0, 0, 0, 0, 0,
};
int mg_knight_table[64] = {
-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,
};
int eg_knight_table[64] = {
-58, -38, -13, -28, -31, -27, -63, -99,
-25, -8, -25, -2, -9, -25, -24, -52,
-24, -20, 10, 9, -1, -9, -19, -41,
-17, 3, 22, 22, 22, 11, 8, -18,
-18, -6, 16, 25, 16, 17, 4, -18,
-23, -3, -1, 15, 10, -3, -20, -22,
-42, -20, -10, -5, -2, -20, -23, -44,
-29, -51, -23, -15, -22, -18, -50, -64,
};
int mg_bishop_table[64] = {
-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,
};
int eg_bishop_table[64] = {
-14, -21, -11, -8, -7, -9, -17, -24,
-8, -4, 7, -12, -3, -13, -4, -14,
2, -8, 0, -1, -2, 6, 0, 4,
-3, 9, 12, 9, 14, 10, 3, 2,
-6, 3, 13, 19, 7, 10, -3, -9,
-12, -3, 8, 10, 13, 3, -7, -15,
-14, -18, -7, -1, 4, -9, -15, -27,
-23, -9, -23, -5, -9, -16, -5, -17,
};
int mg_rook_table[64] = {
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,
};
int eg_rook_table[64] = {
13, 10, 18, 15, 12, 12, 8, 5,
11, 13, 13, 11, -3, 3, 8, 3,
7, 7, 7, 5, 4, -3, -5, -3,
4, 3, 13, 1, 2, 1, -1, 2,
3, 5, 8, 4, -5, -6, -8, -11,
-4, 0, -5, -1, -7, -12, -8, -16,
-6, -6, 0, 2, -9, -9, -11, -3,
-9, 2, 3, -1, -5, -13, 4, -20,
};
int mg_queen_table[64] = {
-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,
};
int eg_queen_table[64] = {
-9, 22, 22, 27, 27, 19, 10, 20,
-17, 20, 32, 41, 58, 25, 30, 0,
-20, 6, 9, 49, 47, 35, 19, 9,
3, 22, 24, 45, 57, 40, 57, 36,
-18, 28, 19, 47, 31, 34, 39, 23,
-16, -27, 15, 6, 9, 17, 10, 5,
-22, -23, -30, -16, -16, -23, -36, -32,
-33, -28, -22, -43, -5, -32, -20, -41,
};
int mg_king_table[64] = {
-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,
};
int eg_king_table[64] = {
-74, -35, -18, -18, -11, 15, 4, -17,
-12, 17, 14, 17, 17, 38, 23, 11,
10, 17, 23, 15, 20, 45, 44, 13,
-8, 22, 24, 27, 26, 33, 26, 3,
-18, -4, 21, 24, 27, 23, 9, -11,
-19, -3, 11, 21, 23, 16, 7, -9,
-27, -11, 4, 13, 14, 4, -5, -17,
-53, -34, -21, -11, -28, -14, -24, -43
};
int* mg_pesto_table[6] =
{
mg_pawn_table,
mg_knight_table,
mg_bishop_table,
mg_rook_table,
mg_queen_table,
mg_king_table
};
int* eg_pesto_table[6] =
{
eg_pawn_table,
eg_knight_table,
eg_bishop_table,
eg_rook_table,
eg_queen_table,
eg_king_table
};
int gamephaseInc[12] = {0,0,1,1,1,1,2,2,4,4,0,0};
int mg_table[12][64];
int eg_table[12][64];
void init_tables()
{
int pc, p, sq;
for (p = PAWN, pc = WHITE_PAWN; p <= KING; pc += 2, p++) {
for (sq = 0; sq < 64; sq++) {
mg_table[pc] [sq] = mg_value[p] + mg_pesto_table[p][sq];
eg_table[pc] [sq] = eg_value[p] + eg_pesto_table[p][sq];
mg_table[pc+1][sq] = mg_value[p] + mg_pesto_table[p][FLIP(sq)];
eg_table[pc+1][sq] = eg_value[p] + eg_pesto_table[p][FLIP(sq)];
}
}
}
int eval()
{
int mg[2];
int eg[2];
int gamePhase = 0;
mg[WHITE] = 0;
mg[BLACK] = 0;
eg[WHITE] = 0;
eg[BLACK] = 0;
/* evaluate each piece */
for (int sq = 0; sq < 64; ++sq) {
int pc = board[sq];
if (pc != EMPTY) {
mg[PCOLOR(pc)] += mg_table[pc][sq];
eg[PCOLOR(pc)] += eg_table[pc][sq];
gamePhase += gamephaseInc[pc];
}
}
/* tapered eval */
int mgScore = mg[side2move] - mg[OTHER(side2move)];
int egScore = eg[side2move] - eg[OTHER(side2move)];
int mgPhase = gamePhase;
if (mgPhase > 24) mgPhase = 24; /* in case of early promotion */
int egPhase = 24 - mgPhase;
return (mgScore * mgPhase + egScore * egPhase) / 24;
}
</pre>
=See also=
* [[PeSTO]]
* [[ProDeo]]
* [[RofChade]]
* [[Simplified Evaluation Function]]
* [[TSCP]]
* [[Wukong JS]]
=Forum Posts=
* [http://www.talkchess.com/forum3/viewtopic.php?f=2&t=68311&start=19 Re: New uci engine: Rofchade] by [[Ronald Friederich]], [[CCC]], Auguat 28, 2018
* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=76238&start=15 Re: Help with Texel's tuning] by [[Maksim Korzh]], [[CCC]], January 07, 2021
* [https://prodeo.actieforum.com/t252-little-fun-with-tscp little fun with TSCP] by [[Pawel Koziol|nescitus]], [[Computer Chess Forums|ProDeo Forum]], February 12, 2021
* [https://prodeo.actieforum.com/t274-prodeo-3-1-the-pesto-version ProDeo 3.1 - The PESTO versionn] by [[Ed Schroder|Ed Schröder]], [[Computer Chess Forums|ProDeo Forum]], February 19, 2021
* [http://www.talkchess.com/forum3/viewtopic.php?f=2&t=76643 ProDeo 3.1 - The PESTO version] by [[Ed Schroder|Ed Schröder]], [[CCC]], February 19, 2021
=External Links=
* [https://rofchade.nl/?p=307 PeSTO: Piece Square Tables Only – RofChade]
* [https://github.com/maksimKorzh/wukongJS/blob/main/wukong.js#L897 wukongJS/wukong.js at main · maksimKorzh/wukongJS · GitHub] by [[Maksim Korzh]]
* [http://www.tckerrigan.com/Chess/TSCP/Community/ Community - Tom Kerrigan's Home Page]
'''[[Evaluation|Up one Level]]'''
