1rb1kbnr/ppqppppp/2p5/8/1P2P3/P4PPN/1nPP3P/R1BQKBR1 b Qk - 0 10
FEN state: 1rb1kbnr/ppqppppp/2p5/8/1P2P3/P4PPN/1nPP3P/R1BQKBR1 b Qk - 0 10 ; Best move: b2d1
The current state of the chess board is: Black rook at b8, black bishop at c8, black king at e8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at b7, black queen at c7, black pawn at d7, black pawn at e7, black pawn at f7, black pawn at g7 and black pawn at h7. Black pawn at c6. White pawn at b4 and white pawn at e4. White pawn at a3, white pawn at f3, white pawn at g3 and white knight at h3. Black knight at b2, white pawn at c2, white pawn at d2 and white pawn at h2. White rook at a1, white bishop at c1, white queen at d1, white king at e1, white bishop at f1 and white rook at g1. White queenside and black kingside castles are available. Half move number is 0. Full move number is 10. Black to move.