r2q2n1/2pbpkb1/p4p1r/1NP3pp/PP1p3P/B5NR/3PPPP1/1R1QKB2 b - - 5 17
FEN state: r2q2n1/2pbpkb1/p4p1r/1NP3pp/PP1p3P/B5NR/3PPPP1/1R1QKB2 b - - 5 17 ; Best move: a6b5
The current state of the chess board is: Black rook at a8, black queen at d8 and black knight at g8. Black pawn at c7, black bishop at d7, black pawn at e7, black king at f7 and black bishop at g7. Black pawn at a6, black pawn at f6 and black rook at h6. White knight at b5, white pawn at c5, black pawn at g5 and black pawn at h5. White pawn at a4, white pawn at b4, black pawn at d4 and white pawn at h4. White bishop at a3, white knight at g3 and white rook at h3. White pawn at d2, white pawn at e2, white pawn at f2 and white pawn at g2. White rook at b1, white queen at d1, white king at e1 and white bishop at f1. Both players have exhausted their castles. Half move number is 5. Full move number is 17. Black to move.