1rbq2nr/p1p2k2/3ppp2/1p5p/RnP1PP2/3N4/3PB1PP/1NB2K1R b - - 5 20
FEN state: 1rbq2nr/p1p2k2/3ppp2/1p5p/RnP1PP2/3N4/3PB1PP/1NB2K1R b - - 5 20 ; Best move: b5a4
The current state of the chess board is: Black rook at b8, black bishop at c8, black queen at d8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at c7 and black king at f7. Black pawn at d6, black pawn at e6 and black pawn at f6. Black pawn at b5 and black pawn at h5. White rook at a4, black knight at b4, white pawn at c4, white pawn at e4 and white pawn at f4. White knight at d3. White pawn at d2, white bishop at e2, white pawn at g2 and white pawn at h2. White knight at b1, white bishop at c1, white king at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 5. Full move number is 20. Black to move.