X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fposition.cpp;h=c814e7657a7e8505d557ff77c673e03889d580c4;hp=ef5fd97091cc4f0f478b41954090ba8e72a1799f;hb=f78b68b7ffd05888bd663acdf400276913126cd5;hpb=3b49aeb4f22569c2b5d5ca830858c4dd584fae7f

diff --git a/src/position.cpp b/src/position.cpp
index ef5fd970..c814e765 100644
--- a/src/position.cpp
+++ b/src/position.cpp
@@ -400,14 +400,22 @@ const string Position::pretty(Move move) const {
   std::ostringstream ss;
 
   if (move)
-      ss << "\nMove is: " << (sideToMove == BLACK ? ".." : "")
+      ss << "\nMove: " << (sideToMove == BLACK ? ".." : "")
          << move_to_san(*const_cast<Position*>(this), move);
 
   for (Square sq = SQ_A1; sq <= SQ_H8; sq++)
       if (piece_on(sq) != NO_PIECE)
           brd[513 - 68*rank_of(sq) + 4*file_of(sq)] = PieceToChar[piece_on(sq)];
 
-  ss << brd << "\nFen is: " << fen() << "\nKey is: " << st->key;
+  ss << brd << "\nFen: " << fen() << "\nKey: " << st->key << "\nCheckers: ";
+
+  for (Bitboard b = checkers(); b; )
+      ss << square_to_string(pop_lsb(&b)) << " ";
+
+  ss << "\nLegal moves: ";
+  for (MoveList<LEGAL> ml(*this); !ml.end(); ++ml)
+      ss << move_to_san(*const_cast<Position*>(this), ml.move()) << " ";
+
   return ss.str();
 }
 
@@ -617,7 +625,7 @@ bool Position::is_pseudo_legal(const Move m) const {
   // Evasions generator already takes care to avoid some kind of illegal moves
   // and pl_move_is_legal() relies on this. So we have to take care that the
   // same kind of moves are filtered out here.
-  if (in_check())
+  if (checkers())
   {
       if (type_of(pc) != KING)
       {
@@ -1144,7 +1152,7 @@ void Position::do_castle_move(Move m) {
 template<bool Do>
 void Position::do_null_move(StateInfo& backupSt) {
 
-  assert(!in_check());
+  assert(!checkers());
 
   // Back up the information necessary to undo the null move to the supplied
   // StateInfo object. Note that differently from normal case here backupSt
@@ -1428,7 +1436,7 @@ bool Position::is_draw() const {
       && (non_pawn_material(WHITE) + non_pawn_material(BLACK) <= BishopValueMg))
       return true;
 
-  if (st->rule50 > 99 && (!in_check() || MoveList<LEGAL>(*this).size()))
+  if (st->rule50 > 99 && (!checkers() || MoveList<LEGAL>(*this).size()))
       return true;
 
   if (CheckRepetition)