- S(33, 31), S(33, 31), S(29, 31), S(20, 28) }};
-
- // Pawn chain membership bonus by file
- const Score ChainMember[FILE_NB] = {
- S(11,-1), S(13,-1), S(13,-1), S(14,-1),
- S(14,-1), S(13,-1), S(13,-1), S(11,-1)
- };
-
- // Candidate passed pawn bonus by rank
- const Score CandidatePassed[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)
- };
-
- // 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) } };
+ S(33, 31), S(33, 31), S(29, 31), S(20, 28) } };
+
+ // Connected pawn bonus by opposed, phalanx flags and rank
+ Score Connected[2][2][RANK_NB];
+
+ // Levers bonus by rank
+ const Score Lever[RANK_NB] = {
+ S( 0, 0), S( 0, 0), S(0, 0), S(0, 0),
+ S(20,20), S(40,40), S(0, 0), S(0, 0) };
+
+ // Unsupported pawn penalty
+ const Score UnsupportedPawnPenalty = S(20, 10);
+
+ // Weakness of our pawn shelter in front of the king by [distance from edge][rank]
+ const Value ShelterWeakness[][RANK_NB] = {
+ { V(101), V(10), V(24), V(68), V(90), V( 95), V(102) },
+ { V(105), V( 1), V(30), V(76), V(95), V(100), V(105) },
+ { V( 99), V( 0), V(32), V(72), V(92), V(101), V(100) },
+ { V( 94), V( 1), V(31), V(68), V(89), V( 98), V(106) } };
+
+ // Danger of enemy pawns moving toward our king by [type][distance from edge][rank]
+ const Value StormDanger[][4][RANK_NB] = {
+ { { V( 0), V( 61), V( 128), V(47), V(27) },
+ { V( 0), V( 66), V( 131), V(49), V(27) },
+ { V( 0), V( 62), V( 126), V(52), V(23) },
+ { V( 0), V( 63), V( 128), V(52), V(26) } },
+ { { V(25), V( 33), V( 95), V(39), V(21) },
+ { V(24), V( 33), V( 97), V(42), V(22) },
+ { V(24), V( 33), V( 93), V(35), V(23) },
+ { V(26), V( 27), V( 96), V(37), V(22) } },
+ { { V( 0), V( 0), V( 80), V(14), V( 8) },
+ { V( 0), V( 0), V( 163), V(28), V(12) },
+ { V( 0), V( 0), V( 163), V(25), V(15) },
+ { V( 0), V( 0), V( 161), V(24), V(14) } },
+ { { V( 0), V(-300), V(-300), V(54), V(23) },
+ { V( 0), V( 67), V( 128), V(46), V(24) },
+ { V( 0), V( 64), V( 130), V(50), V(29) },
+ { V( 0), V( 63), V( 127), V(51), V(24) } } };