From 3d1ad600019d5c1de17f855877e189aef1e74e48 Mon Sep 17 00:00:00 2001
From: rainrat <rainrat78@yahoo.ca>
Date: Sun, 31 Dec 2023 02:56:16 -0800
Subject: [PATCH] use first available piece as null move rather than A1

---
 src/movegen.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/movegen.cpp b/src/movegen.cpp
index 0c99cb322..6d0849bed 100644
--- 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)));
         }
     }