r2q1knr/1b2p3/p5p1/1Qpp1p1p/3P1b1P/PPPK4/R3P1PR/1N3BN1 b - - 1 20
FEN state: r2q1knr/1b2p3/p5p1/1Qpp1p1p/3P1b1P/PPPK4/R3P1PR/1N3BN1 b - - 1 20 ; Best move: a6b5
The current state of the chess board is: Black rook at a8, black queen at d8, black king at f8, black knight at g8 and black rook at h8. Black bishop at b7 and black pawn at e7. Black pawn at a6 and black pawn at g6. White queen at b5, black pawn at c5, black pawn at d5, black pawn at f5 and black pawn at h5. White pawn at d4, black bishop at f4 and white pawn at h4. White pawn at a3, white pawn at b3, white pawn at c3 and white king at d3. White rook at a2, white pawn at e2, white pawn at g2 and white rook at h2. White knight at b1, white bishop at f1 and white knight at g1. Both players have exhausted their castles. Half move number is 1. Full move number is 20. Black to move.