r1bq4/p1prk2p/3bp3/3pP1N1/3n1pB1/p1P2P2/1P4KP/RN1QB2R w - - 1 20
FEN state: r1bq4/p1prk2p/3bp3/3pP1N1/3n1pB1/p1P2P2/1P4KP/RN1QB2R w - - 1 20 ; Best move: d1d4
The current state of the chess board is: Black rook at a8, black bishop at c8 and black queen at d8. Black pawn at a7, black pawn at c7, black rook at d7, black king at e7 and black pawn at h7. Black bishop at d6 and black pawn at e6. Black pawn at d5, white pawn at e5 and white knight at g5. Black knight at d4, black pawn at f4 and white bishop at g4. Black pawn at a3, white pawn at c3 and white pawn at f3. White pawn at b2, white king at g2 and white pawn at h2. White rook at a1, white knight at b1, white queen at d1, white bishop at e1 and white rook at h1. Both players have exhausted their castles. Half move number is 1. Full move number is 20. White to move.