r1bq2nr/p2kpp1p/1p3b2/n1p1P1p1/P2P2PP/N1P5/2R1pPB1/2BQK2R b - - 0 20
FEN state: r1bq2nr/p2kpp1p/1p3b2/n1p1P1p1/P2P2PP/N1P5/2R1pPB1/2BQK2R b - - 0 20 ; Best move: e2d1r
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black knight at g8 and black rook at h8. Black pawn at a7, black king at d7, black pawn at e7, black pawn at f7 and black pawn at h7. Black pawn at b6 and black bishop at f6. Black knight at a5, black pawn at c5, white pawn at e5 and black pawn at g5. White pawn at a4, white pawn at d4, white pawn at g4 and white pawn at h4. White knight at a3 and white pawn at c3. White rook at c2, black pawn at e2, white pawn at f2 and white bishop at g2. White bishop at c1, white queen at d1, white king at e1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 20. Black to move.