rnb1kbnr/ppp1qp2/3p4/4p3/3P4/4PPP1/PPP1B2P/RNBQ1RK1 w q - 1 10
FEN state: rnb1kbnr/ppp1qp2/3p4/4p3/3P4/4PPP1/PPP1B2P/RNBQ1RK1 w q - 1 10 ; Best move: f1f2
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at e8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at b7, black pawn at c7, black queen at e7 and black pawn at f7. Black pawn at d6. Black pawn at e5. White pawn at d4. White pawn at e3, white pawn at f3 and white pawn at g3. White pawn at a2, white pawn at b2, white pawn at c2, white bishop at e2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1, white queen at d1, white rook at f1 and white king at g1. Black queenside is the only castle move available. Half move number is 1. Full move number is 10. White to move.