1nbq2nr/2pp1kpp/rb3p2/1p2p3/p1P3PP/PP6/3PPP1R/RNBQKBN1 w Q - 1 10
FEN state: 1nbq2nr/2pp1kpp/rb3p2/1p2p3/p1P3PP/PP6/3PPP1R/RNBQKBN1 w Q - 1 10 ; Best move: c4b5
The current state of the chess board is: Black knight at b8, black bishop at c8, black queen at d8, black knight at g8 and black rook at h8. Black pawn at c7, black pawn at d7, black king at f7, black pawn at g7 and black pawn at h7. Black rook at a6, black bishop at b6 and black pawn at f6. Black pawn at b5 and black pawn at e5. Black pawn at a4, white pawn at c4, white pawn at g4 and white pawn at h4. White pawn at a3 and white pawn at b3. White pawn at d2, white pawn at e2, white pawn at f2 and white rook at h2. White rook at a1, white knight at b1, white bishop at c1, white queen at d1, white king at e1, white bishop at f1 and white knight at g1. White queenside is the only castle move available. Half move number is 1. Full move number is 10. White to move.