r1b1kr2/ppnqp1bp/7n/B1pp1pp1/P1PP1P2/NQ1KP1P1/1P4BP/1R4NR b q - 8 15
FEN state: r1b1kr2/ppnqp1bp/7n/B1pp1pp1/P1PP1P2/NQ1KP1P1/1P4BP/1R4NR b q - 8 15 ; Best move: b7b6
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8 and black rook at f8. Black pawn at a7, black pawn at b7, black knight at c7, black queen at d7, black pawn at e7, black bishop at g7 and black pawn at h7. Black knight at h6. White bishop at a5, black pawn at c5, black pawn at d5, black pawn at f5 and black pawn at g5. White pawn at a4, white pawn at c4, white pawn at d4 and white pawn at f4. White knight at a3, white queen at b3, white king at d3, white pawn at e3 and white pawn at g3. White pawn at b2, white bishop at g2 and white pawn at h2. White rook at b1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 8. Full move number is 15. Black to move.