r1bk2nr/pq1nbpp1/1p2p1p1/1Npp4/P1PPP2P/1P3N1B/R3KP2/2BQ1R2 w - - 2 20
FEN state: r1bk2nr/pq1nbpp1/1p2p1p1/1Npp4/P1PPP2P/1P3N1B/R3KP2/2BQ1R2 w - - 2 20 ; Best move: e4d5
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at d8, black knight at g8 and black rook at h8. Black pawn at a7, black queen at b7, black knight at d7, black bishop at e7, black pawn at f7 and black pawn at g7. Black pawn at b6, black pawn at e6 and black pawn at g6. White knight at b5, black pawn at c5 and black pawn at d5. White pawn at a4, white pawn at c4, white pawn at d4, white pawn at e4 and white pawn at h4. White pawn at b3, white knight at f3 and white bishop at h3. White rook at a2, white king at e2 and white pawn at f2. White bishop at c1, white queen at d1 and white rook at f1. Both players have exhausted their castles. Half move number is 2. Full move number is 20. White to move.