r1bqkbn1/1p1p1p1r/p5p1/1np1p1Pp/1PP1P2P/B4P1R/P7/R2QKBN1 b Q - 1 15
FEN state: r1bqkbn1/1p1p1p1r/p5p1/1np1p1Pp/1PP1P2P/B4P1R/P7/R2QKBN1 b Q - 1 15 ; Best move: b5a3
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black king at e8, black bishop at f8 and black knight at g8. Black pawn at b7, black pawn at d7, black pawn at f7 and black rook at h7. Black pawn at a6 and black pawn at g6. Black knight at b5, black pawn at c5, black pawn at e5, white pawn at g5 and black pawn at h5. White pawn at b4, white pawn at c4, white pawn at e4 and white pawn at h4. White bishop at a3, white pawn at f3 and white rook at h3. White pawn at a2. White rook at a1, white queen at d1, 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.