r1b1k3/pppqpp1r/B4nnp/3p2p1/P7/1PP1PP2/R1P3PP/1NBQK1R1 b q - 7 15
FEN state: r1b1k3/pppqpp1r/B4nnp/3p2p1/P7/1PP1PP2/R1P3PP/1NBQK1R1 b q - 7 15 ; Best move: b7a6
The current state of the chess board is: Black rook at a8, black bishop at c8 and black king at e8. Black pawn at a7, black pawn at b7, black pawn at c7, black queen at d7, black pawn at e7, black pawn at f7 and black rook at h7. White bishop at a6, black knight at f6, black knight at g6 and black pawn at h6. Black pawn at d5 and black pawn at g5. White pawn at a4. White pawn at b3, white pawn at c3, white pawn at e3 and white pawn at f3. White rook at a2, white pawn at c2, white pawn at g2 and white pawn at h2. White knight at b1, white bishop at c1, white queen at d1, white king at e1 and white rook at g1. Black queenside is the only castle move available. Half move number is 7. Full move number is 15. Black to move.