rnbq4/1p1pn1p1/p1p2k1r/1B6/1P1Pp2p/P3P2N/5PPP/RNB1K2R b KQ - 1 13
FEN state: rnbq4/1p1pn1p1/p1p2k1r/1B6/1P1Pp2p/P3P2N/5PPP/RNB1K2R b KQ - 1 13 ; Best move: a6b5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8 and black queen at d8. Black pawn at b7, black pawn at d7, black knight at e7 and black pawn at g7. Black pawn at a6, black pawn at c6, black king at f6 and black rook at h6. White bishop at b5. White pawn at b4, white pawn at d4, black pawn at e4 and black pawn at h4. White pawn at a3, white pawn at e3 and white knight at h3. White pawn at f2, white pawn at g2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1, white king at e1 and white rook at h1. White kingside and white queenside castles are available. Half move number is 1. Full move number is 13. Black to move.