r1bq1b1r/pp1n1kp1/3p1n1p/2p2p2/PB2p1P1/1PP2P1N/3PP2P/RNQ1KB1R w KQ - 2 10
FEN state: r1bq1b1r/pp1n1kp1/3p1n1p/2p2p2/PB2p1P1/1PP2P1N/3PP2P/RNQ1KB1R w KQ - 2 10 ; Best move: b4a3
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 a7, black pawn at b7, black knight at d7, black king at f7 and black pawn at g7. Black pawn at d6, black knight at f6 and black pawn at h6. Black pawn at c5 and black pawn at f5. White pawn at a4, white bishop at b4, black pawn at e4 and white pawn at g4. White pawn at b3, white pawn at c3, white pawn at f3 and white knight at h3. White pawn at d2, white pawn at e2 and white pawn at h2. White rook at a1, white knight at b1, white queen 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 2. Full move number is 10. White to move.