use first available piece as null move rather than A1

fairy-stockfish · Dec 31, 2023 · 3d1ad60 · 3d1ad60
1 parent b5a06b3
commit 3d1ad60
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/movegen.cpp b/src/movegen.cpp
@@ -448,7 +448,7 @@ namespace {
         //if "wall or move", generate walling action with null move
         if (pos.variant()->wallOrMove)
         {
-            moveList = make_move_and_gating<NORMAL>(pos, moveList, Us, SQ_A1, SQ_A1);
+            moveList = make_move_and_gating<NORMAL>(pos, moveList, Us, lsb(pos.pieces(Us)), lsb(pos.pieces(Us)));
         }
     }