r2k1bnr/Bpp1ppQ1/p6p/P2p2pP/N3Pq2/5b2/P1PP1P1R/R3KBN1 w Q - 1 18
FEN state: r2k1bnr/Bpp1ppQ1/p6p/P2p2pP/N3Pq2/5b2/P1PP1P1R/R3KBN1 w Q - 1 18 ; Best move: g7f8
The current state of the chess board is: Black rook at a8, black king at d8, black bishop at f8, black knight at g8 and black rook at h8. White bishop at a7, black pawn at b7, black pawn at c7, black pawn at e7, black pawn at f7 and white queen at g7. Black pawn at a6 and black pawn at h6. White pawn at a5, black pawn at d5, black pawn at g5 and white pawn at h5. White knight at a4, white pawn at e4 and black queen at f4. Black bishop at f3. White pawn at a2, white pawn at c2, white pawn at d2, white pawn at f2 and white rook at h2. White rook at a1, white king at e1, white bishop at f1 and white knight at g1. White queenside is the only castle move available. Half move number is 1. Full move number is 18. White to move.