The book

The preflop strategy the show grades every decision against, as charts. Pick the game, the table size and the stacks, then act position by position. Each square is a starting hand; its fill is how often the solver folds, calls, raises or jams there.

Solved by external-sampling MCCFR over an abstract tree: no limps, one raise size per raise, all-in when it is meaningfully bigger. Cash tables are chip EV. Sit-n-go tables use ICM on the show's points ladder, so short stacks fold hands the cash book plays. The book stops at the flop; postflop the show solves each spot live. More under how it works.