r1bqkb2/p1pppp1r/Q4np1/2pn4/8/P1NP1PPN/1PK1P1RP/1RB2B2 b q - 0 17
FEN state: r1bqkb2/p1pppp1r/Q4np1/2pn4/8/P1NP1PPN/1PK1P1RP/1RB2B2 b q - 0 17 ; Best move: c8a6
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black king at e8 and black bishop at f8. Black pawn at a7, black pawn at c7, black pawn at d7, black pawn at e7, black pawn at f7 and black rook at h7. White queen at a6, black knight at f6 and black pawn at g6. Black pawn at c5 and black knight at d5. White pawn at a3, white knight at c3, white pawn at d3, white pawn at f3, white pawn at g3 and white knight at h3. White pawn at b2, white king at c2, white pawn at e2, white rook at g2 and white pawn at h2. White rook at b1, white bishop at c1 and white bishop at f1. Black queenside is the only castle move available. Half move number is 0. Full move number is 17. Black to move.