Originally Posted by
Carl-Haakon
You can easily calculate the payout thusly:
Payout = 1/(1/D2(A) + 1/D2(B))
where D2(A) and D2(B) are the decimal odds of, for instance, team A or team B winning when draw=no bet. There's no easy way to compare this to three-way lines (that I can think of); a difficult way would be to synthesize your own DNB odds from the three-way lines. If you wanted to create synthetic DNB-odds for team A winning, you'd bet a certain amount x1 on team A and enough on the draw to win back the money you put into the draw and A bets; let's call this amount x2. x2 can be calculated as
x2 = x1/(D3(draw)-1)
where D3(draw) is the decimal three-way odds of a draw. Your synthetic DNB decimal odds for team A winning would then be given by
D2synthetic(A) = D3(A)*x1/(x1 + x2)
where D3(A) is the decimal three-way odds of A winning.
You could then compare the synthetic two-way odds with the 5D-ones