Turnstone
The app's poker engine, which answers flop, turn and river spots while you play and says how sure each answer is.
Last updated
- What it means
- Turnstone is the engine behind the trainer's postflop grades. It solves turns and rivers exactly while you play. For a flop with no shipped solution it searches the flop and asks a neural network what each hand is worth at the turn.
- How it is calculated
- The search runs 30 rounds over the flop's betting. At each turn card it asks a network trained on 100,000 exact turn solves for the value of every hand, instead of playing out every turn and river. It covers 13 heads-up spots, after a raise and a call or a 3-bet and a call, at the trainer's own bet sizes.
- Worked example
- Measured on 2026-10-13 over 575 flops, Turnstone's flop answers gave up about 0.3% of the pot on average against an exact solve, and 0.79% in its worst spot, 3-bet pots at 40 big blinds.
- Why it matters
- Knowing where an answer came from tells you how far to trust it. A grade from the flop search is marked engine estimate; a turn or river grade is an exact solve.
See also: Engine estimate, Exact answer, Who graded it, Solver flops