From: Marco Costalba <mcostalba@gmail.com>
Date: Mon, 6 Jul 2009 08:40:50 +0000 (+0100)
Subject: Fix generation of check blocking promotion
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=a5fce1958b6dde56a67c7ef656e2b5fe7d3258d4;ds=sidebyside

Fix generation of check blocking promotion

A promotion move is not considered a possible evasion as it could be.

Bug introduced by patch

Convert also generate_pawn_blocking_evasions() to new API (7/5/2009)

Bug spotted by Kenny Dail.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
---

diff --git a/src/movegen.cpp b/src/movegen.cpp
index 33da450e..ff8f6c6e 100644
--- a/src/movegen.cpp
+++ b/src/movegen.cpp
@@ -864,7 +864,7 @@ namespace {
                                              Bitboard blockSquares, MoveStack* mlist) {
 
     // Calculate our parametrized parameters at compile time
-    const Bitboard TRank8BB = (Us == WHITE ? Rank8BB : Rank1BB);
+    const Rank TRANK_8 = (Us == WHITE ? RANK_8 : RANK_1);
     const Bitboard TRank3BB = (Us == WHITE ? Rank3BB : Rank6BB);
     const SquareDelta TDELTA_N = (Us == WHITE ? DELTA_N : DELTA_S);
 
@@ -882,7 +882,7 @@ namespace {
 
         assert(pos.piece_on(to) == EMPTY);
 
-        if (square_rank(to) == TRank8BB)
+        if (square_rank(to) == TRANK_8)
         {
             (*mlist++).move = make_promotion_move(to - TDELTA_N, to, QUEEN);
             (*mlist++).move = make_promotion_move(to - TDELTA_N, to, ROOK);