rq2k1n1/p2np1b1/bp1p2pr/2p2pNp/1BB1P3/N2P1PPQ/PPP4P/1R2K2R b Kq - 5 15
FEN state: rq2k1n1/p2np1b1/bp1p2pr/2p2pNp/1BB1P3/N2P1PPQ/PPP4P/1R2K2R b Kq - 5 15 ; Best move: a6c4
The current state of the chess board is: Black rook at a8, black queen at b8, black king at e8 and black knight at g8. Black pawn at a7, black knight at d7, black pawn at e7 and black bishop at g7. Black bishop at a6, black pawn at b6, black pawn at d6, black pawn at g6 and black rook at h6. Black pawn at c5, black pawn at f5, white knight at g5 and black pawn at h5. White bishop at b4, white bishop at c4 and white pawn at e4. White knight at a3, white pawn at d3, white pawn at f3, white pawn at g3 and white queen at h3. White pawn at a2, white pawn at b2, white pawn at c2 and white pawn at h2. White rook at b1, white king at e1 and white rook at h1. White kingside and black queenside castles are available. Half move number is 5. Full move number is 15. Black to move.