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/* Sjaak, a program for playing chess
* Copyright (C) 2011, 2014 Evert Glebbeek
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* Integer constants are used within the evaluation itself, floating point
* values are only used when initialising the evaluation tables at startup.
*/
#define GAME_PHASE_FLOOR 80
#define SAFE_MOB_WEIGHT 8 // Weight for safe mobility squares
#define MOB_SCALE 16 // Overall mobility weight
#define MOB_FORWARD_BLOCKED 5 // Penalty for forward mobility blocked by pieces
#define KS_ATTACK_WEIGHT 256
#define KS_SHELTER_WEIGHT 32
#define KING_SAFETY_WEIGHT 416 // Overall scale-factor for king safety
// Weight vs. STS score:
// 512 (3126)
// 256 (3044)
// 384 (3118)
// 448 (3117)
// 416 (3128)
#define PST_HOLDINGS 5 // PST value for a piece in holdings
#define PST_SPACE_MG 5 // PST value for empty squares on the own side of the board
#define PST_CENTRE_Q 1.0
#define PST_CENTRE_L 0.0
#define PST_ADVANCE_Q 0.0
#define PST_ADVANCE_L 0.0
#define PST_SCALE_PALACE 1.1 // Scale factor for PST in games with a palace
#define MOBILITY_SCALE_MG 128.0 // Scale factor for mobility, middle game
// Weight vs. STS score:
// 96 (8001, 923)
// 112 (8143, 932)
// 120 (8055, 932)
// 128 (8234, 940)
// 130 (8110, 922)
// 140 (8086, 926)
// 192 (8094, 931)
#define MOBILITY_SCALE_EG 128.0 // Scale factor for mobility, end game
// Weight vs. STS score:
// 120 (8114, 928)
// 128 (8234, 940)
// 140 (8007, 916)
#define PASSER_RANK_BASE 4
#define PASSER_RANK_SCALE 128
#define PAWN_ADVANCE_Q_EG 98.0 // Bonus for advancing pawns in the end game, quadratic term
#define PAWN_ADVANCE_L_EG 0.0 // Bonus for advancing pawns in the end game, linear term
#define PAWN_ADVANCE_Q_MG 0.0 // Bonus for advancing pawns in the middle game, quadratic term
#define PAWN_ADVANCE_L_MG 0.0 // Bonus for advancing pawns in the middle game, linear term
#define ROOK_BASE_PAWN_MG 5 // Bonus for a rook that attacks base of enemy pawn structure, middle game
#define ROOK_BASE_PAWN_EG 10 // Bonus for a rook that attacks base of enemy pawn structure, end game
#define WEAK_PAWN_BASE_MG 5 // Penalty for a weak pawn, middle game
#define WEAK_PAWN_BASE_EG 10 // Penalty for a weak pawn, end game
#define LOOSE_MINOR_PENALTY 5 // Penalty for an undefended minor on the enemy side of the board
#define PAIR_BONUS_MG 0.10 // Fraction of piece value
#define PAIR_BONUS_EG 0.15 // Fraction of piece value
#define SLIDER_OPENFILE_MG 10 // Slider bonus on open file, middle game
#define SLIDER_OPENFILE_EG 15 // Slider bonus on open file, end game
#define HOPPER_KINGFILE_MG 50 // Hopper on same file as enemy king, middle game
#define HOPPER_KINGFILE_EG 0 // Hopper on same file as enemy king, middle game
#define DEF_PROTECT 7 // Bonus for defensive pieces that protect eachother
#define DEF_SHIELD_FILE 10 // Bonus for defensive pieces on king file
#define FUTILITY_DEPTH 3
#define PAWN_SCALE_MG 0.8 // Fraction of nominal piece value
#define LAME_SCALE_MG 0.9 // Fraction of nominal piece value
#define LAME_SCALE_EG 1.1 // Fraction of nominal piece value
#define DEF_SCALE_MG 1.1 // Fraction of nominal piece value
#define DEF_SCALE_EG 0.8 // Fraction of nominal piece value
#define HOP_SCALE_EG 0.7 // Fraction of nominal piece value
#define TEMPO_DROP_WEIGHT 2 // Weighting of in-hand material for the tempo bonus
#define TEMPO_DROP_MAX 32767 // Absolute limit for the tempo bonus
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