r4k1r/1bppn1pp/ppn1qp2/1Q2B3/1P2p3/N3bNP1/P1P1PPRP/1R2KB2 b - - 9 17
FEN state: r4k1r/1bppn1pp/ppn1qp2/1Q2B3/1P2p3/N3bNP1/P1P1PPRP/1R2KB2 b - - 9 17 ; Best move: a6b5
The current state of the chess board is: Black rook at a8, black king at f8 and black rook at h8. Black bishop at b7, black pawn at c7, black pawn at d7, black knight at e7, black pawn at g7 and black pawn at h7. Black pawn at a6, black pawn at b6, black knight at c6, black queen at e6 and black pawn at f6. White queen at b5 and white bishop at e5. White pawn at b4 and black pawn at e4. White knight at a3, black bishop at e3, white knight at f3 and white pawn at g3. White pawn at a2, white pawn at c2, white pawn at e2, white pawn at f2, white rook at g2 and white pawn at h2. White rook at b1, white king at e1 and white bishop at f1. Both players have exhausted their castles. Half move number is 9. Full move number is 17. Black to move.