r2qkb2/2p4r/n2ppp2/1p4p1/P3P1bp/1p3NP1/1PPP1PBP/RNB1KR2 b q - 0 17
FEN state: r2qkb2/2p4r/n2ppp2/1p4p1/P3P1bp/1p3NP1/1PPP1PBP/RNB1KR2 b q - 0 17 ; Best move: a6b4
The current state of the chess board is: Black rook at a8, black queen at d8, black king at e8 and black bishop at f8. Black pawn at c7 and black rook at h7. Black knight at a6, black pawn at d6, black pawn at e6 and black pawn at f6. Black pawn at b5 and black pawn at g5. White pawn at a4, white pawn at e4, black bishop at g4 and black pawn at h4. Black pawn at b3, white knight at f3 and white pawn at g3. White pawn at b2, white pawn at c2, white pawn at d2, white pawn at f2, white bishop 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 f1. Black queenside is the only castle move available. Half move number is 0. Full move number is 17. Black to move.