r1bq1b1r/1ppp1kpp/2n2p2/pP2pn2/3N1B2/P2P1N2/2P1PPPP/R2QKBR1 b Q - 0 10
FEN state: r1bq1b1r/1ppp1kpp/2n2p2/pP2pn2/3N1B2/P2P1N2/2P1PPPP/R2QKBR1 b Q - 0 10 ; Best move: c6d4
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black bishop at f8 and black rook at h8. Black pawn at b7, black pawn at c7, black pawn at d7, black king at f7, black pawn at g7 and black pawn at h7. Black knight at c6 and black pawn at f6. Black pawn at a5, white pawn at b5, black pawn at e5 and black knight at f5. White knight at d4 and white bishop at f4. White pawn at a3, white pawn at d3 and white knight at f3. White pawn at c2, white pawn at e2, white pawn at f2, white pawn at g2 and white pawn at h2. White rook at a1, white queen at d1, white king at e1, white bishop at f1 and white rook at g1. White queenside is the only castle move available. Half move number is 0. Full move number is 10. Black to move.