r1b1kN2/p2pbn2/1p3q1n/2p1pppp/2P4P/2NPPP2/PP2Q1P1/RKB2BR1 w q - 10 23
FEN state: r1b1kN2/p2pbn2/1p3q1n/2p1pppp/2P4P/2NPPP2/PP2Q1P1/RKB2BR1 w q - 10 23 ; Best move: f8h7
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8 and white knight at f8. Black pawn at a7, black pawn at d7, black bishop at e7 and black knight at f7. Black pawn at b6, black queen at f6 and black knight at h6. Black pawn at c5, black pawn at e5, black pawn at f5, black pawn at g5 and black pawn at h5. White pawn at c4 and white pawn at h4. White knight at c3, white pawn at d3, white pawn at e3 and white pawn at f3. White pawn at a2, white pawn at b2, white queen at e2 and white pawn at g2. White rook at a1, white king at b1, white bishop at c1, white bishop at f1 and white rook at g1. Black queenside is the only castle move available. Half move number is 10. Full move number is 23. White to move.