rnbq4/2ppkp2/p4n2/1p4Nr/QPP3Pp/P2P1p1P/4P3/bNBK1BR1 b - - 3 20
FEN state: rnbq4/2ppkp2/p4n2/1p4Nr/QPP3Pp/P2P1p1P/4P3/bNBK1BR1 b - - 3 20 ; Best move: b5a4
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8 and black queen at d8. Black pawn at c7, black pawn at d7, black king at e7 and black pawn at f7. Black pawn at a6 and black knight at f6. Black pawn at b5, white knight at g5 and black rook at h5. White queen at a4, white pawn at b4, white pawn at c4, white pawn at g4 and black pawn at h4. White pawn at a3, white pawn at d3, black pawn at f3 and white pawn at h3. White pawn at e2. Black bishop at a1, white knight at b1, white bishop at c1, white king at d1, white bishop at f1 and white rook at g1. Both players have exhausted their castles. Half move number is 3. Full move number is 20. Black to move.