From: Fabian Fichter <ianfab@users.noreply.github.com>
Date: Fri, 17 Mar 2023 11:17:33 +0000 (+0100)
Subject: Fix atomic captures with wall squares
X-Git-Url: http://winboard.nl/cgi-bin?a=commitdiff_plain;h=bc33c7a06c779d55c693a00f9991af93ba481f9e;p=fairystockfish.git

Fix atomic captures with wall squares

Closes #599.
---

diff --git a/src/position.cpp b/src/position.cpp
index 1770155..f9813e6 100644
--- a/src/position.cpp
+++ b/src/position.cpp
@@ -1073,7 +1073,7 @@ bool Position::legal(Move m) const {
       if (type_of(m) == EN_PASSANT)
           occupied &= ~square_bb(kto - pawn_push(us));
       if (capture(m) && blast_on_capture())
-          occupied &= ~((attacks_bb<KING>(kto) & (pieces() ^ pieces(PAWN))) | kto);
+          occupied &= ~((attacks_bb<KING>(kto) & ((pieces(WHITE) | pieces(BLACK)) ^ pieces(PAWN))) | kto);
       Bitboard pseudoRoyals = st->pseudoRoyals & pieces(sideToMove);
       Bitboard pseudoRoyalsTheirs = st->pseudoRoyals & pieces(~sideToMove);
       if (is_ok(from) && (pseudoRoyals & from))
@@ -1818,7 +1818,7 @@ void Position::do_move(Move m, StateInfo& newSt, bool givesCheck) {
   {
       std::memset(st->unpromotedBycatch, 0, sizeof(st->unpromotedBycatch));
       st->demotedBycatch = st->promotedBycatch = 0;
-      Bitboard blast =  blast_on_capture() ? (attacks_bb<KING>(to) & (pieces() ^ pieces(PAWN))) | to
+      Bitboard blast =  blast_on_capture() ? (attacks_bb<KING>(to) & ((pieces(WHITE) | pieces(BLACK)) ^ pieces(PAWN))) | to
                       : type_of(pc) != PAWN ? square_bb(to) : Bitboard(0);
       while (blast)
       {
@@ -2218,7 +2218,7 @@ Value Position::blast_see(Move m) const {
   Square to = to_sq(m);
   Color us = color_of(moved_piece(m));
   Bitboard fromto = type_of(m) == DROP ? square_bb(to) : from | to;
-  Bitboard blast = ((attacks_bb<KING>(to) & ~pieces(PAWN)) | fromto) & pieces();
+  Bitboard blast = ((attacks_bb<KING>(to) & ~pieces(PAWN)) | fromto) & (pieces(WHITE) | pieces(BLACK));
 
   Value result = VALUE_ZERO;