rn3bnr/p1p1kqp1/b2p3p/Pp2pp2/5PP1/1PP4N/3PP2P/RNBQKB1R b K - 0 12
FEN state: rn3bnr/p1p1kqp1/b2p3p/Pp2pp2/5PP1/1PP4N/3PP2P/RNBQKB1R b K - 0 12 ; Best move: a6b7
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at c7, black king at e7, black queen at f7 and black pawn at g7. Black bishop at a6, black pawn at d6 and black pawn at h6. White pawn at a5, black pawn at b5, black pawn at e5 and black pawn at f5. White pawn at f4 and white pawn at g4. White pawn at b3, white pawn at c3 and white knight at h3. White pawn at d2, white pawn at e2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1, 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 0. Full move number is 12. Black to move.