Simplify move generation (2/2)

BM123499 · snicolet · commit 830f597134bc · 2021-03-16T22:34:23.000+01:00
STC: LLR: 2.97 (-2.94,2.94) {-1.25,0.25} Total: 39352 W: 3551 L: 3493 D: 32308 Ptnml(0-2): 143, 2695, 13928, 2781, 129 https://tests.stockfishchess.org/tests/view/6050007a2433018de7a38bbb LTC: LLR: 2.96 (-2.94,2.94) {-0.75,0.25} Total: 44944 W: 1629 L: 1596 D: 41719 Ptnml(0-2): 22, 1319, 19762, 1342, 27 https://tests.stockfishchess.org/tests/view/60500e892433018de7a38bc4 Closes #3399 No functional change
diff --git a/src/movegen.cpp b/src/movegen.cpp
@@ -63,7 +63,7 @@ namespace {
     Bitboard pawnsOn7    = pos.pieces(Us, PAWN) &  TRank7BB;
     Bitboard pawnsNotOn7 = pos.pieces(Us, PAWN) & ~TRank7BB;
 
-    Bitboard enemies = (Type == EVASIONS ? pos.pieces(Them) & target:
+    Bitboard enemies = (Type == EVASIONS ? pos.checkers():
                         Type == CAPTURES ? target : pos.pieces(Them));
 
     // Single and double pawn pushes, no promotions
