1r1q1knr/p1p1p1b1/n3b3/1p1p2pp/1PP5/P2PN2P/1B1KPPP1/RNQ2B1R b - - 4 20
FEN state: 1r1q1knr/p1p1p1b1/n3b3/1p1p2pp/1PP5/P2PN2P/1B1KPPP1/RNQ2B1R b - - 4 20 ; Best move: d5d4
The current state of the chess board is: Black rook at b8, black queen at d8, black king at f8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at c7, black pawn at e7 and black bishop at g7. Black knight at a6 and black bishop at e6. Black pawn at b5, black pawn at d5, black pawn at g5 and black pawn at h5. White pawn at b4 and white pawn at c4. White pawn at a3, white pawn at d3, white knight at e3 and white pawn at h3. White bishop at b2, white king at d2, white pawn at e2, white pawn at f2 and white pawn at g2. White rook at a1, white knight at b1, white queen at c1, white bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 4. Full move number is 20. Black to move.