rn1k1br1/p2bpp1p/q1p5/3pn1N1/QP1P4/B1P4P/4PPP1/RN1K1B1R b - - 6 20
FEN state: rn1k1br1/p2bpp1p/q1p5/3pn1N1/QP1P4/B1P4P/4PPP1/RN1K1B1R b - - 6 20 ; Best move: a6a4
The current state of the chess board is: Black rook at a8, black knight at b8, black king at d8, black bishop at f8 and black rook at g8. Black pawn at a7, black bishop at d7, black pawn at e7, black pawn at f7 and black pawn at h7. Black queen at a6 and black pawn at c6. Black pawn at d5, black knight at e5 and white knight at g5. White queen at a4, white pawn at b4 and white pawn at d4. White bishop at a3, white pawn at c3 and white pawn at h3. White pawn at e2, white pawn at f2 and white pawn at g2. White rook at a1, white knight at b1, white king at d1, white bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 6. Full move number is 20. Black to move.