- // Candidate passed pawn bonus by rank
- const Score CandidateBonus[RANK_NB] = {
- S( 0, 0), S( 6, 13), S(6,13), S(14,29),
- S(34,68), S(83,166), S(0, 0), S( 0, 0)
- };
-
- const Score PawnStructureWeight = S(233, 201);
-
- // Weakness of our pawn shelter in front of the king indexed by [king pawn][rank]
- const Value ShelterWeakness[2][RANK_NB] =
- { { V(141), V(0), V(38), V(102), V(128), V(141), V(141) },
- { V( 61), V(0), V(16), V( 44), V( 56), V( 61), V( 61) } };
-
- // Danger of enemy pawns moving toward our king indexed by [pawn blocked][rank]
- const Value StormDanger[2][RANK_NB] =
- { { V(26), V(0), V(128), V(51), V(26) },
- { V(13), V(0), V( 64), V(25), V(13) } };
+ const Score CenterBind = S(16, 0);
+
+ // Weakness of our pawn shelter in front of the king by [distance from edge][rank]
+ const Value ShelterWeakness[][RANK_NB] = {
+ { V( 99), V(20), V(26), V(54), V(85), V( 92), V(108) },
+ { V(117), V( 1), V(27), V(71), V(94), V(104), V(118) },
+ { V(104), V( 4), V(51), V(76), V(82), V(102), V( 97) },
+ { V( 80), V(12), V(43), V(65), V(88), V( 91), V(115) } };
+
+ // Danger of enemy pawns moving toward our king by [type][distance from edge][rank]
+ const Value StormDanger[][4][RANK_NB] = {
+ { { V( 0), V( 65), V( 126), V(36), V(30) },
+ { V( 0), V( 55), V( 135), V(36), V(23) },
+ { V( 0), V( 47), V( 116), V(45), V(26) },
+ { V( 0), V( 62), V( 127), V(57), V(34) } },
+ { { V(21), V( 45), V( 93), V(50), V(19) },
+ { V(23), V( 24), V( 105), V(41), V(13) },
+ { V(23), V( 36), V( 101), V(38), V(20) },
+ { V(30), V( 19), V( 110), V(41), V(27) } },
+ { { V( 0), V( 0), V( 81), V(14), V( 4) },
+ { V( 0), V( 0), V( 169), V(30), V( 3) },
+ { V( 0), V( 0), V( 168), V(24), V( 5) },
+ { V( 0), V( 0), V( 162), V(26), V(10) } },
+ { { V( 0), V(-283), V(-298), V(57), V(29) },
+ { V( 0), V( 63), V( 137), V(42), V(18) },
+ { V( 0), V( 67), V( 145), V(49), V(33) },
+ { V( 0), V( 62), V( 126), V(53), V(21) } } };