r1bqk1r1/p1pp3p/1p3pp1/2n1pQb1/1PP4P/2NPPN2/P2K1PP1/R1B2B1R w q - 0 15
FEN state: r1bqk1r1/p1pp3p/1p3pp1/2n1pQb1/1PP4P/2NPPN2/P2K1PP1/R1B2B1R w q - 0 15 ; Best move: f5g4
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black king at e8 and black rook at g8. Black pawn at a7, black pawn at c7, black pawn at d7 and black pawn at h7. Black pawn at b6, black pawn at f6 and black pawn at g6. Black knight at c5, black pawn at e5, white queen at f5 and black bishop at g5. White pawn at b4, white pawn at c4 and white pawn at h4. White knight at c3, white pawn at d3, white pawn at e3 and white knight at f3. White pawn at a2, white king at d2, white pawn at f2 and white pawn at g2. White rook at a1, white bishop at c1, white bishop at f1 and white rook at h1. Black queenside is the only castle move available. Half move number is 0. Full move number is 15. White to move.