Retire is_mate()

[stockfish] / src / position.cpp

diff --git a/src/position.cpp b/src/position.cpp
index 085b9a3b1312771512a0b8615678d27283e4c983..88eb22eaa338d910b08647abbf4e95b0f3841de3 100644 (file)
--- a/src/position.cpp
+++ b/src/position.cpp
@@ -1499,7 +1499,7 @@ bool Position::is_draw() const {
       return true;
 
   // Draw by the 50 moves rule?
-  if (st->rule50 > 99 && !is_mate())
+  if (st->rule50 > 99 && (!in_check() || MoveList<MV_LEGAL>(*this).size()))
       return true;
 
   // Draw by repetition?
@@ -1531,15 +1531,6 @@ template bool Position::is_draw<false>() const;
 template bool Position::is_draw<true>() const;
 
 
-/// Position::is_mate() returns true or false depending on whether the
-/// side to move is checkmated.
-
-bool Position::is_mate() const {
-
-  return in_check() && !MoveList<MV_LEGAL>(*this).size();
-}
-
-
 /// Position::init() is a static member function which initializes at startup
 /// the various arrays used to compute hash keys and the piece square tables.
 /// The latter is a two-step operation: First, the white halves of the tables