r2qkb1r/p1p1n1pp/n4p2/1p2p2b/2Pp3P/Q4P2/PP1PP1B1/R1BNK1NR b KQkq - 0 12
FEN state: r2qkb1r/p1p1n1pp/n4p2/1p2p2b/2Pp3P/Q4P2/PP1PP1B1/R1BNK1NR b KQkq - 0 12 ; Best move: a6b8
The current state of the chess board is: Black rook at a8, black queen at d8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at a7, black pawn at c7, black knight at e7, black pawn at g7 and black pawn at h7. Black knight at a6 and black pawn at f6. Black pawn at b5, black pawn at e5 and black bishop at h5. White pawn at c4, black pawn at d4 and white pawn at h4. White queen at a3 and white pawn at f3. White pawn at a2, white pawn at b2, white pawn at d2, white pawn at e2 and white bishop at g2. White rook at a1, white bishop at c1, white knight at d1, white king at e1, white knight at g1 and white rook at h1. White kingside, white queenside, black kingside and black queenside castles are available. Half move number is 0. Full move number is 12. Black to move.