1nb2k1r/rp1pp2p/p6n/qP2bpp1/PB1pN3/8/2P1PPPP/1R1QKBNR b K - 7 15
FEN state: 1nb2k1r/rp1pp2p/p6n/qP2bpp1/PB1pN3/8/2P1PPPP/1R1QKBNR b K - 7 15 ; Best move: a5a4
The current state of the chess board is: Black knight at b8, black bishop at c8, black king at f8 and black rook at h8. Black rook at a7, black pawn at b7, black pawn at d7, black pawn at e7 and black pawn at h7. Black pawn at a6 and black knight at h6. Black queen at a5, white pawn at b5, black bishop at e5, black pawn at f5 and black pawn at g5. White pawn at a4, white bishop at b4, black pawn at d4 and white knight at e4. White pawn at c2, white pawn at e2, white pawn at f2, white pawn at g2 and white pawn at h2. White rook at b1, white queen at d1, white king at e1, white bishop at f1, white knight at g1 and white rook at h1. White kingside is the only castle move available. Half move number is 7. Full move number is 15. Black to move.