r1bqkb1r/1pp1npp1/p7/1N1pp2p/5N2/1PP2P2/PRQP1PPP/2B1KB1R b K - 3 12
FEN state: r1bqkb1r/1pp1npp1/p7/1N1pp2p/5N2/1PP2P2/PRQP1PPP/2B1KB1R b K - 3 12 ; Best move: a6b5
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at b7, black pawn at c7, black knight at e7, black pawn at f7 and black pawn at g7. Black pawn at a6. White knight at b5, black pawn at d5, black pawn at e5 and black pawn at h5. White knight at f4. White pawn at b3, white pawn at c3 and white pawn at f3. White pawn at a2, white rook at b2, white queen at c2, white pawn at d2, white pawn at f2, white pawn at g2 and white pawn at h2. White bishop at c1, 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 3. Full move number is 12. Black to move.