rnbqkb2/2p1p1p1/p4n2/2rp1p1p/1p1P1P2/2PQPNP1/PP2K2P/RNB2B1R b q - 1 15
FEN state: rnbqkb2/2p1p1p1/p4n2/2rp1p1p/1p1P1P2/2PQPNP1/PP2K2P/RNB2B1R b q - 1 15 ; Best move: c5b5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black queen at d8, black king at e8 and black bishop at f8. Black pawn at c7, black pawn at e7 and black pawn at g7. Black pawn at a6 and black knight at f6. Black rook at c5, black pawn at d5, black pawn at f5 and black pawn at h5. Black pawn at b4, white pawn at d4 and white pawn at f4. White pawn at c3, white queen at d3, white pawn at e3, white knight at f3 and white pawn at g3. White pawn at a2, white pawn at b2, white king at e2 and white pawn at h2. White rook at a1, white knight at b1, 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 1. Full move number is 15. Black to move.