r1bq1r2/p1p1k1p1/3p3p/1P1npP2/1Q2n1PP/1P3P2/P2P2B1/RN2K1NR b - - 2 20
FEN state: r1bq1r2/p1p1k1p1/3p3p/1P1npP2/1Q2n1PP/1P3P2/P2P2B1/RN2K1NR b - - 2 20 ; Best move: d5b4
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8 and black rook at f8. Black pawn at a7, black pawn at c7, black king at e7 and black pawn at g7. Black pawn at d6 and black pawn at h6. White pawn at b5, black knight at d5, black pawn at e5 and white pawn at f5. White queen at b4, black knight at e4, white pawn at g4 and white pawn at h4. White pawn at b3 and white pawn at f3. White pawn at a2, white pawn at d2 and white bishop at g2. White rook at a1, white knight at b1, white king at e1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 2. Full move number is 20. Black to move.