1rb1kbr1/N3p2p/n1p4P/q2p2p1/1P1Pn1P1/P3p2N/2P1PP2/1R1QKB1R b K - 1 16
FEN state: 1rb1kbr1/N3p2p/n1p4P/q2p2p1/1P1Pn1P1/P3p2N/2P1PP2/1R1QKB1R b K - 1 16 ; Best move: a6b4
The current state of the chess board is: Black rook at b8, black bishop at c8, black king at e8, black bishop at f8 and black rook at g8. White knight at a7, black pawn at e7 and black pawn at h7. Black knight at a6, black pawn at c6 and white pawn at h6. Black queen at a5, black pawn at d5 and black pawn at g5. White pawn at b4, white pawn at d4, black knight at e4 and white pawn at g4. White pawn at a3, black pawn at e3 and white knight at h3. White pawn at c2, white pawn at e2 and white pawn at f2. White rook at b1, white queen at d1, white king at e1, white bishop at f1 and white rook at h1. White kingside is the only castle move available. Half move number is 1. Full move number is 16. Black to move.