r1b1kbn1/pppp1p2/n6r/4P1pp/4P3/P2Q4/2PB1KPP/RN3BNR w q - 1 10
FEN state: r1b1kbn1/pppp1p2/n6r/4P1pp/4P3/P2Q4/2PB1KPP/RN3BNR w q - 1 10 ; Best move: f2e1
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 knight at g8. Black pawn at a7, black pawn at b7, black pawn at c7, black pawn at d7 and black pawn at f7. Black knight at a6 and black rook at h6. White pawn at e5, black pawn at g5 and black pawn at h5. White pawn at e4. White pawn at a3 and white queen at d3. White pawn at c2, white bishop at d2, white king at f2, white pawn at g2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at f1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 1. Full move number is 10. White to move.