55 vs 44
Preflop odds, heads-up Texas Hold'em
55
5♠5♥
80.8%
44
4♦4♣
19.2%
55 is the favorite: it wins about 80.8% of the time against 44 when both hands go to showdown, with ties 2.7% of runouts.
Computed from 400k simulated deals with the hands shown above.
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