rn4nr/2p1p1b1/p1k3qp/1pPp1pp1/3P1PP1/N6N/PP1BP2R/R2QKB2 w Q - 4 16
FEN state: rn4nr/2p1p1b1/p1k3qp/1pPp1pp1/3P1PP1/N6N/PP1BP2R/R2QKB2 w Q - 4 16 ; Best move: g4f5
The current state of the chess board is: Black rook at a8, black knight at b8, black knight at g8 and black rook at h8. Black pawn at c7, black pawn at e7 and black bishop at g7. Black pawn at a6, black king at c6, black queen at g6 and black pawn at h6. Black pawn at b5, white pawn at c5, black pawn at d5, black pawn at f5 and black pawn at g5. White pawn at d4, white pawn at f4 and white pawn at g4. White knight at a3 and white knight at h3. White pawn at a2, white pawn at b2, white bishop at d2, white pawn at e2 and white rook at h2. White rook at a1, white queen at d1, white king at e1 and white bishop at f1. White queenside is the only castle move available. Half move number is 4. Full move number is 16. White to move.