1q2kb2/rb1pppp1/2p5/pp2P3/1PP1n3/P2P2Pr/3BKP1P/R1QN1B1R w - - 4 20
FEN state: 1q2kb2/rb1pppp1/2p5/pp2P3/1PP1n3/P2P2Pr/3BKP1P/R1QN1B1R w - - 4 20 ; Best move: d3e4
The current state of the chess board is: Black queen at b8, black king at e8 and black bishop at f8. Black rook at a7, black bishop at b7, black pawn at d7, black pawn at e7, black pawn at f7 and black pawn at g7. Black pawn at c6. Black pawn at a5, black pawn at b5 and white pawn at e5. White pawn at b4, white pawn at c4 and black knight at e4. White pawn at a3, white pawn at d3, white pawn at g3 and black rook at h3. White bishop at d2, white king at e2, white pawn at f2 and white pawn at h2. White rook at a1, white queen at c1, white knight at d1, 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. White to move.