rn2kb1r/4pp1p/pp4q1/2pp2p1/b1P1P1N1/PP1PQPP1/RB1NBR2/3K4 w kq - 0 21
FEN state: rn2kb1r/4pp1p/pp4q1/2pp2p1/b1P1P1N1/PP1PQPP1/RB1NBR2/3K4 w kq - 0 21 ; Best move: e4d5
The current state of the chess board is: Black rook at a8, black knight at b8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at e7, black pawn at f7 and black pawn at h7. Black pawn at a6, black pawn at b6 and black queen at g6. Black pawn at c5, black pawn at d5 and black pawn at g5. Black bishop at a4, white pawn at c4, white pawn at e4 and white knight at g4. White pawn at a3, white pawn at b3, white pawn at d3, white queen at e3, white pawn at f3 and white pawn at g3. White rook at a2, white bishop at b2, white knight at d2, white bishop at e2 and white rook at f2. White king at d1. Black kingside and black queenside castles are available. Half move number is 0. Full move number is 21. White to move.