Can’t seem to find much clear info on how it works. Can u solve preflop ranges for any two positions in a full ring game? For example can you solve what the optimal range for what a button should open with and then the optimal range the bb should call or raise with given specific stack sizes and bet sizing? If so, how long does it generally take to solve assuming a decent computer?

You can solve an abstracted version of the game tree (it won't be 100% accurate but "good enough" for most purposes). A "decent" computer isn't anywhere near enough. You need a big dedicated server with hundreds of GB of RAM and it will take a very long time.

thanks. i assume this is the case even if i am just looking at preflop and dont care about post?

Pre-flop takes longer to solve than post-flop, because ranges are wider pre-flop. (You can get dealt any two cards pre-flop, but you're unlikely to ever be on a river with 32o on a AKQ95 board with a possible flush).
In effect, to solve pre-flop, the software needs to work backwards from the river and every possible action sequence that could reach there, to work out which hands would be profitable. It's much more trivial (i.e. quick) for the software to work out the optimal way to play 50 combos on a specific board, than to work out how to play 1326 combos on millions of boards. After all, to know what to do pre-flop, the software would need to simulate every possible hand of poker.
Cliffs: Solving rivers = simple. Solving the complete game (including pre-flop) = very difficult.

Thanks. Any thoughts on simple preflop which appears to not require as much calculations due to abstractions. Is it too simplified so it takes away effectiveness ?


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You could limit the amount of hands preflop to your best guess at ranges but your choice of ranges will likely highly influence the results you receive and it would still probably take longer than you expect.

I'd never heard of 'Simple PreFlop' before, but apparently it exists. I can't vouch for how accurate, quick, or useful it is. If you're just trying to build a pre-flop strategy for playing full ring, I think you can just use Snowie, or whatever are the built-in preset ranges for Pio, Monker, or GTO+ etc. Or just look at the stats of winning players. Most regs have got pretty solid opening ranges. They might not be completely optimal, but are close enough that they're not missing huge chunks of EV.
Various training sites produce pre-flop charts (including 3-bet/4-bet ranges) and you can't go too wrong by following them. Getting the complete solution to pre-flop isn't really necessary if you're just donking around anyway. Most of your money is made post-flop.