AA vs 66
Preflop odds, heads-up Texas Hold'em
AA
A♠A♥
79.8%
66
6♦6♣
20.2%
AA is the favorite: it wins about 79.8% of the time against 66 when both hands go to showdown, with ties 0.3% of runouts.
Computed from 400k simulated deals with the hands shown above.
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