- // Danger of enemy pawns moving toward our king by [type][distance from edge][rank].
- // For the unopposed and unblocked cases, RANK_1 = 0 is used when opponent has
- // no pawn on the given file, or their pawn is behind our king.
- constexpr Value StormDanger[][4][RANK_NB] = {
- { { V(11), V( 79), V(132), V( 68), V( 33) }, // Unopposed
- { V( 4), V(104), V(155), V( 4), V( 21) },
- { V(-7), V( 59), V(142), V( 45), V( 30) },
- { V( 0), V( 62), V(113), V( 43), V( 13) } },
- { { V( 0), V( 0), V( 37), V( 5), V(-48) }, // BlockedByPawn
- { V( 0), V( 0), V( 68), V(-12), V( 13) },
- { V( 0), V( 0), V(111), V(-25), V( -3) },
- { V( 0), V( 0), V(108), V( 14), V( 21) } },
- { { V(38), V( 78), V( 83), V( 35), V( 22) }, // Unblocked
- { V(33), V(-15), V(108), V( 12), V( 28) },
- { V( 8), V( 25), V( 94), V( 68), V( 25) },
- { V( 6), V( 48), V(120), V( 68), V( 40) } }
+ // Danger of enemy pawns moving toward our king by [distance from edge][rank].
+ // RANK_1 = 0 is used for files where the enemy has no pawn, or their pawn
+ // is behind our king.
+ constexpr Value UnblockedStorm[int(FILE_NB) / 2][RANK_NB] = {
+ { V(54), V( 48), V( 99), V(91), V(42), V( 32), V( 31) },
+ { V(34), V( 27), V(105), V(38), V(32), V(-19), V( 3) },
+ { V(-4), V( 28), V( 87), V(18), V(-3), V(-14), V(-11) },
+ { V(-5), V( 22), V( 75), V(14), V( 2), V( -5), V(-19) }