rnbq1b1r/p2k3p/4pp1n/1ppp2pP/4P1P1/P4P2/1PPP4/RNBQKBNR w K - 0 9
FEN state: rnbq1b1r/p2k3p/4pp1n/1ppp2pP/4P1P1/P4P2/1PPP4/RNBQKBNR w K - 0 9 ; Best move: f1b5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black queen at d8, black bishop at f8 and black rook at h8. Black pawn at a7, black king at d7 and black pawn at h7. Black pawn at e6, black pawn at f6 and black knight at h6. Black pawn at b5, black pawn at c5, black pawn at d5, black pawn at g5 and white pawn at h5. White pawn at e4 and white pawn at g4. White pawn at a3 and white pawn at f3. White pawn at b2, white pawn at c2 and white pawn at d2. White rook at a1, white knight at b1, white bishop at c1, white queen at d1, white king at e1, white bishop at f1, white knight at g1 and white rook at h1. White kingside is the only castle move available. Half move number is 0. Full move number is 9. White to move.