r1b2k1r/p2p1ppp/n2bp2n/1pp5/3N4/1PP4P/P1QNPPP1/R1B1KB1R b KQ - 4 10
FEN state: r1b2k1r/p2p1ppp/n2bp2n/1pp5/3N4/1PP4P/P1QNPPP1/R1B1KB1R b KQ - 4 10 ; Best move: c5d4
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at f8 and black rook at h8. Black pawn at a7, black pawn at d7, black pawn at f7, black pawn at g7 and black pawn at h7. Black knight at a6, black bishop at d6, black pawn at e6 and black knight at h6. Black pawn at b5 and black pawn at c5. White knight at d4. White pawn at b3, white pawn at c3 and white pawn at h3. White pawn at a2, white queen at c2, white knight at d2, white pawn at e2, white pawn at f2 and white pawn at g2. White rook at a1, white bishop at c1, white king at e1, white bishop at f1 and white rook at h1. White kingside and white queenside castles are available. Half move number is 4. Full move number is 10. Black to move.