Fix assertion for en passant

diff --git a/src/movegen.cpp b/src/movegen.cpp
index 60a1efd..6c852aa 100644 (file)
--- a/src/movegen.cpp
+++ b/src/movegen.cpp
@@ -263,7 +263,8 @@ namespace {
 
             Bitboard b = pawns & pawn_attacks_bb(Them, epSquare);
 
-            assert(b);
+            // En passant square is already disabled for non-fairy variants if there is no attacker
+            assert(b || !pos.variant()->fastAttacks);
 
             while (b)
                 moveList = make_move_and_gating<EN_PASSANT>(pos, moveList, Us, pop_lsb(b), epSquare);