r2q1k2/1pp3br/3pb3/Pn2Np1p/3P4/P4P2/R1P1PBPP/1N2KBR1 b - - 1 20
FEN state: r2q1k2/1pp3br/3pb3/Pn2Np1p/3P4/P4P2/R1P1PBPP/1N2KBR1 b - - 1 20 ; Best move: d6e5
The current state of the chess board is: Black rook at a8, black queen at d8 and black king at f8. Black pawn at b7, black pawn at c7, black bishop at g7 and black rook at h7. Black pawn at d6 and black bishop at e6. White pawn at a5, black knight at b5, white knight at e5, black pawn at f5 and black pawn at h5. White pawn at d4. White pawn at a3 and white pawn at f3. White rook at a2, white pawn at c2, white pawn at e2, white bishop at f2, white pawn at g2 and white pawn at h2. White knight at b1, white king at e1, white bishop at f1 and white rook at g1. Both players have exhausted their castles. Half move number is 1. Full move number is 20. Black to move.