constexpr Score WeakLever = S( 0, 56);
constexpr Score WeakUnopposed = S(13, 27);
+ // Bonus for blocked pawns at 5th or 6th rank
+ constexpr Score BlockedPawn[2] = { S(-10, -3), S(-3, 3) };
+
constexpr Score BlockedStorm[RANK_NB] = {
S(0, 0), S(0, 0), S(76, 78), S(-10, 15), S(-7, 10), S(-4, 6), S(-1, 2)
};
if (!support)
score -= Doubled * doubled
+ WeakLever * more_than_one(lever);
+
+ if (blocked && r > RANK_4)
+ score += BlockedPawn[r-4];
}
return score;