r2qkb2/p2bp1p1/n2p1n2/1ppP1p1r/1BN5/1B2P2P/PPP2PP1/1R2K1NR b K - 2 12
FEN state: r2qkb2/p2bp1p1/n2p1n2/1ppP1p1r/1BN5/1B2P2P/PPP2PP1/1R2K1NR b K - 2 12 ; Best move: b5c4
The current state of the chess board is: Black rook at a8, black queen at d8, black king at e8 and black bishop at f8. Black pawn at a7, black bishop at d7, black pawn at e7 and black pawn at g7. Black knight at a6, black pawn at d6 and black knight at f6. Black pawn at b5, black pawn at c5, white pawn at d5, black pawn at f5 and black rook at h5. White bishop at b4 and white knight at c4. White bishop at b3, white pawn at e3 and white pawn at h3. White pawn at a2, white pawn at b2, white pawn at c2, white pawn at f2 and white pawn at g2. White rook at b1, white king at e1, white knight at g1 and white rook at h1. White kingside is the only castle move available. Half move number is 2. Full move number is 12. Black to move.