r2qkb2/p2bppBp/6pn/1ppp4/2P2P2/1P5P/P2PnKPR/RN1Q1BN1 w q - 2 10
FEN state: r2qkb2/p2bppBp/6pn/1ppp4/2P2P2/1P5P/P2PnKPR/RN1Q1BN1 w q - 2 10 ; Best move: g7f8
The current state of the chess board is: Black rook at a8, black queen at d8, black king at e8 and black bishop at f8. Black pawn at a7, black bishop at d7, black pawn at e7, black pawn at f7, white bishop at g7 and black pawn at h7. Black pawn at g6 and black knight at h6. Black pawn at b5, black pawn at c5 and black pawn at d5. White pawn at c4 and white pawn at f4. White pawn at b3 and white pawn at h3. White pawn at a2, white pawn at d2, black knight at e2, white king at f2, white pawn at g2 and white rook at h2. White rook at a1, white knight at b1, white queen at d1, white bishop at f1 and white knight at g1. Black queenside is the only castle move available. Half move number is 2. Full move number is 10. White to move.