r1bQ1bnr/ppBpp3/n4pp1/5k1p/3P3P/P1p1P2R/2P2PP1/RN2KBN1 b Q - 1 15
FEN state: r1bQ1bnr/ppBpp3/n4pp1/5k1p/3P3P/P1p1P2R/2P2PP1/RN2KBN1 b Q - 1 15 ; Best move: a6c7
The current state of the chess board is: Black rook at a8, black bishop at c8, white queen at d8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at b7, white bishop at c7, black pawn at d7 and black pawn at e7. Black knight at a6, black pawn at f6 and black pawn at g6. Black king at f5 and black pawn at h5. White pawn at d4 and white pawn at h4. White pawn at a3, black pawn at c3, white pawn at e3 and white rook at h3. White pawn at c2, white pawn at f2 and white pawn at g2. White rook at a1, white knight at b1, 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 15. Black to move.