Fix disambiguation bug in move_to_san()

[stockfish] / src / move.cpp

diff --git a/src/move.cpp b/src/move.cpp
index b019110b974f044db3f08bb262e6ead65c711d99..d079ee7b56f840b4aaebe61c48066446eb49fe34 100644 (file)
--- a/src/move.cpp
+++ b/src/move.cpp
@@ -21,7 +21,6 @@
 #include <cstring>
 #include <string>
 
-#include "move.h"
 #include "movegen.h"
 #include "position.h"
 
@@ -107,6 +106,10 @@ const string move_to_san(Position& pos, Move m) {
           {
               sq = pop_1st_bit(&attackers);
 
+              // Pinned pieces are not included in the possible sub-set
+              if (!pos.pl_move_is_legal(make_move(sq, to), pos.pinned_pieces()))
+                  continue;
+
               if (file_of(sq) == file_of(from))
                   ambiguousFile = true;