r1b1kb1r/2pqp2p/n2p1ppn/pp6/N1P4P/1P1P4/P2BPPP1/R2QKBNR w KQkq - 1 10
FEN state: r1b1kb1r/2pqp2p/n2p1ppn/pp6/N1P4P/1P1P4/P2BPPP1/R2QKBNR w KQkq - 1 10 ; Best move: c4b5
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at c7, black queen at d7, black pawn at e7 and black pawn at h7. Black knight at a6, black pawn at d6, black pawn at f6, black pawn at g6 and black knight at h6. Black pawn at a5 and black pawn at b5. White knight at a4, white pawn at c4 and white pawn at h4. White pawn at b3 and white pawn at d3. White pawn at a2, white bishop at d2, white pawn at e2, white pawn at f2 and white pawn at g2. White rook at a1, white queen at d1, white king at e1, white bishop at f1, 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 1. Full move number is 10. White to move.