What size kicker to go broke with in HU play

[roommate]

the lowest kicker that can win against another kicker is (of course) a five. I therefore recommend you NEVER go broke with one lower than that... this includes 4, 3, and 2 (ace is high don't forget). So that leaves a kicker of 5 through A as possibilities to win... the "average" kicker will be 9.5... so you ought to be higher than that... the standard deviation of the possible "winning" kickers is 3.027. It follows that there is a 13% chance of someone having an ace or king kicker. Coupled with your desired winrate (lets assume 65%) leads me to conclude that if you hold a Jack kicker your opponent will have a lower kicker 68% of the time.

Therefore, I suggest you NEVER EVER EVER go broke with less than a JACK kicker... or it will be impossible to acheive a 65% winrate.

~rob