r1bk2nr/pp2ppb1/n1Bp2pp/1N6/2q1P1P1/5PNP/PPPP4/R1BQKR2 w Q - 7 13
FEN state: r1bk2nr/pp2ppb1/n1Bp2pp/1N6/2q1P1P1/5PNP/PPPP4/R1BQKR2 w Q - 7 13 ; Best move: b5d6
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at d8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at b7, black pawn at e7, black pawn at f7 and black bishop at g7. Black knight at a6, white bishop at c6, black pawn at d6, black pawn at g6 and black pawn at h6. White knight at b5. Black queen at c4, white pawn at e4 and white pawn at g4. White pawn at f3, white knight at g3 and white pawn at h3. White pawn at a2, white pawn at b2, white pawn at c2 and white pawn at d2. White rook at a1, white bishop at c1, white queen at d1, white king at e1 and white rook at f1. White queenside is the only castle move available. Half move number is 7. Full move number is 13. White to move.