r3k2r/p1p1np1p/6Qn/RPPPpP1b/4P1P1/1P6/5K1P/qNB2BNR w kq - 1 21
FEN state: r3k2r/p1p1np1p/6Qn/RPPPpP1b/4P1P1/1P6/5K1P/qNB2BNR w kq - 1 21 ; Best move: a5a1
The current state of the chess board is: Black rook at a8, black king at e8 and black rook at h8. Black pawn at a7, black pawn at c7, black knight at e7, black pawn at f7 and black pawn at h7. White queen at g6 and black knight at h6. White rook at a5, white pawn at b5, white pawn at c5, white pawn at d5, black pawn at e5, white pawn at f5 and black bishop at h5. White pawn at e4 and white pawn at g4. White pawn at b3. White king at f2 and white pawn at h2. Black queen at a1, white knight at b1, white bishop at c1, white bishop at f1, white knight at g1 and white rook at h1. Black kingside and black queenside castles are available. Half move number is 1. Full move number is 21. White to move.