- // 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( 89), V(107), V(123), V(93), V(57), V( 45), V( 51) },
+ { V( 44), V(-18), V(123), V(46), V(39), V( -7), V( 23) },
+ { V( 4), V( 52), V(162), V(37), V( 7), V(-14), V( -2) },
+ { V(-10), V(-14), V( 90), V(15), V( 2), V( -7), V(-16) }