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Part 3 · Lesson 12 of 25 · Pro

Heads-up with high blinds: jam or fold

Course by Hernan Alejandro Gajardo Morales

At 10 bb, K♦ 7♣ in the small blind: whenever the Rock calls you are behind, yet moving all in earns 0.9 bb more than folding. With short stacks the game shrinks to two choices for the small blind, all in or fold, and the big blind calls or folds.

The hand

Heads-up with 10 bb stacks. You are in the small blind with K♦ 7♣. The Rock, in the big blind, calls an all-in only with about the best 12% of hands: 66+, A7s+, KTs+, A9o+ and KQo.

Predict first

All in or fold?

  1. All in
  2. Fold: K7 is too weak
  3. Fold: he only calls with better hands

Formula

EV of jamming compared with folding, stacks S bb, blinds 0.5 and 1: P(fold) × 1.5 + P(call) × [equity × 2S − (S − 0.5)]

This lesson is part of Pro. Above are its opening, its question and the idea it leads to; the worked numbers, the common mistake, the interactive tool and the check are in the app.

The app adds an interactive tool for this lesson, a hand replay, narration and practice questions with new numbers every time.

Open this lesson in the app Use the calculator

This lesson builds on ideas from chapter 12 of The Mathematics of Poker by Bill Chen and Jerrod Ankenman (ConJelCo, 2006), explained in our own words; nothing is copied from the book. Poker Math Coach is not affiliated with or endorsed by the authors or publisher.