Almost every HU player that is near the top of the game right now opens close to 100%, and some do open 100% of buttons. Obviously you don't have to open every button but if you're a good player you want to play as many hands IP as possible.
That's conventional wisdom; I just think it's wrong. It's not terribly wrong in that it isn't fundamentally unprofitable to open the button super wide (unless the rake is crushing you or your skill gap vs villain is too narrow), but I mean, the only reasons you wanna play a wider range ever are 1) to prevent yourself from becoming exploitable (not happening unless you open less than 1/3 of buttons), to give yourself more
frequent chances to make a profit (irrelevant HU because if you don't see a flop neither is the other guy -- you fold, next hand is dealt instantly, so that at worst you're seeing like 10% less flops per hour when you open super tight than when you open wide), and to get more action for entertainment value (again, irrelevant, if you open super tight you're still seeing almost as many flops as if you open every button).
Like, just stop and think for a second. This isn't 6max. If you open-fold you're not gonna wait 3 minutes to get a playable hand, you're gonna get the next hand IMMEDIATELY.
Sorry man only opening 40% is just going to be ****ing terrible. You get to play the hand IP and you're really just going to open fold 60% of hands?
There's no reason not to. I mean, if you can get away with having max flopability and you're not really getting any extra wait time by doing so (nor can you become exploitable), you absolutely should because it gives you an even bigger edge as opposed to JUST having a position edge.
And seriously, I'm convinced the reason HU rake is supposedly unbeatable at the micros is that people see too many flops because they're "supposed" to, so even if they're good they end up in spots where their EV is just marginally positive. And every time your postflop EV is less than +5% (e.g. rake charged), it becomes
negative because the rake is eating your winnings.
Again this is way too tight. So against someone minraising 100% (a pretty common strategy from good regs, and how I typically play actually) you're going to fold 66%? You're getting 3:1 on your money preflop, and although you do have to play the hand oop I refuse to believe that Q8o and 78s are folds against a literally random hand getting 3:1. The more standard strategy against 100% minr is something like 80% defend with something like 15-20% 3-bet. So basically your 3bet number but a shitton more flatting, and that's because you're getting good odds so you don't even have to do a ton of stuff postflop when you miss. Obviously you should play poker so if your opponent is opening 100% and cbetting 100% you shouldn't be folding every time you miss but the point is that folding that many hands preflop is going to be a pretty big leak.
Again, I have no real reason to defend wider OOP therefore I won't. And it can't be a leak because I'm not folding more than villain needs me to to autoprofit since he's laying himself 2:1 (again blinds have to be included). And an added card edge is ESPECIALLY important OOP because when you play OOP you're at an inherent disadvantage -- you're not really expected to realize more than 70% or so of your postflop
equity most of the time, even if you're significantly better than Villain.