feat: 1.0.1 added InCheck and CheckSquare to Position

engine.go

@@ -109,10 +109,7 @@ func addTags(m *Move, pos *Position) {
 }
 
 func isInCheck(pos *Position) bool {
- kingSq := pos.board.whiteKingSq
- if pos.Turn() == Black {
- kingSq = pos.board.blackKingSq
- }
+ kingSq := pos.activeKingSquare()
  // king should only be missing in tests / examples
  if kingSq == NoSquare {
  return false

liad/liad.go

@@ -50,6 +50,9 @@ func main() {
  if game.Position().EnPassantSquare() != octad.NoSquare {
  fmt.Printf(", enp: %s", game.Position().EnPassantSquare().String())
  }
+ if game.Position().InCheck() {
+ fmt.Printf(", in check at %s", game.Position().CheckSquare())
+ }
  }
  fmt.Println(game.Position().Board().Draw())
 

position.go

@@ -137,6 +137,20 @@ func (pos *Position) CastleRights() CastleRights {
  return pos.castleRights
 }
 
+// InCheck returns true if the king is in check in the position.
+func (pos *Position) InCheck() bool {
+ return pos.inCheck
+}
+
+// CheckSquare returns the square containing the checked king.
+func (pos *Position) CheckSquare() Square {
+ if pos.inCheck {
+ return pos.activeKingSquare()
+ }
+
+ return NoSquare
+}
+
 // String implements the fmt.Stringer interface and returns a
 // string with the OFEN format: ppkn/4/4/NKPP w NCFncf - 0 1
 func (pos *Position) String() string {
@@ -368,6 +382,14 @@ func removeCastlingRight(rights *string, removedRight string) {
  *rights = strings.Replace(*rights, removedRight, "", -1)
 }
 
+func (pos *Position) activeKingSquare() Square {
+ kingSq := pos.board.whiteKingSq
+ if pos.Turn() == Black {
+ kingSq = pos.board.blackKingSq
+ }
+ return kingSq
+}
+
 func (pos *Position) updateEnPassantSquare(m *Move) Square {
  p := pos.board.Piece(m.s1)
  if p.Type() != Pawn {