r1bqk1nr/p5pp/n2bp3/1p3p2/P2p1PP1/3p3P/RPPNPNB1/2B1QKR1 b - - 0 17
FEN state: r1bqk1nr/p5pp/n2bp3/1p3p2/P2p1PP1/3p3P/RPPNPNB1/2B1QKR1 b - - 0 17 ; Best move: a6b4
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 knight at g8 and black rook at h8. Black pawn at a7, black pawn at g7 and black pawn at h7. Black knight at a6, black bishop at d6 and black pawn at e6. Black pawn at b5 and black pawn at f5. White pawn at a4, black pawn at d4, white pawn at f4 and white pawn at g4. Black pawn at d3 and white pawn at h3. White rook at a2, white pawn at b2, white pawn at c2, white knight at d2, white pawn at e2, white knight at f2 and white bishop at g2. White bishop at c1, white queen at e1, white king at f1 and white rook at g1. Both players have exhausted their castles. Half move number is 0. Full move number is 17. Black to move.