rnb1kb2/p2pp3/5pr1/1pp2Q1p/1P1P4/P1P2N1P/R2KBPPq/1NB5 w q - 0 18
FEN state: rnb1kb2/p2pp3/5pr1/1pp2Q1p/1P1P4/P1P2N1P/R2KBPPq/1NB5 w q - 0 18 ; Best move: f5g6
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at e8 and black bishop at f8. Black pawn at a7, black pawn at d7 and black pawn at e7. Black pawn at f6 and black rook at g6. Black pawn at b5, black pawn at c5, white queen at f5 and black pawn at h5. White pawn at b4 and white pawn at d4. White pawn at a3, white pawn at c3, white knight at f3 and white pawn at h3. White rook at a2, white king at d2, white bishop at e2, white pawn at f2, white pawn at g2 and black queen at h2. White knight at b1 and white bishop at c1. Black queenside is the only castle move available. Half move number is 0. Full move number is 18. White to move.