- constexpr Score Backward = S( 9, 24);
- constexpr Score Doubled = S(11, 56);
- constexpr Score Isolated = S( 5, 15);
- constexpr Score WeakLever = S( 0, 56);
- constexpr Score WeakUnopposed = S(13, 27);
+ constexpr Score Backward = S( 8, 27);
+ constexpr Score Doubled = S(11, 55);
+ constexpr Score Isolated = S( 5, 17);
+ constexpr Score WeakLever = S( 2, 54);
+ constexpr Score WeakUnopposed = S(15, 25);
+
+ // Bonus for blocked pawns at 5th or 6th rank
+ constexpr Score BlockedPawn[2] = { S(-13, -4), S(-4, 3) };