What is a good cutoff defense range vs an open?
The GTO solver Cutoff defense range at 100bb re-raises 9.7%, calls 0%, and folds 90.3% of hands in the fixed spot below.
This cutoff model faces a hijack open with the button and blinds still to act. The grid compares calls, re-raises, and folds across authored opponent models. Both the defending seat and the opener’s position matter when comparing this view with another defense chart.
The GTO solver chart is our CFR solver's 100bb ranges, with 2.5bb opens (3bb from the small blind). The other charts are the ranges Poker Shark's Arena opponents play, not recommendations for your own play. The Arena's GTO opponent is GTO-style: hand-written rules, a little tighter than a solver. The other types are modeled on real players. Percentages are how often each one takes each action.
Green is raise, blue is limp or call, and gray is fold. Each share fills that percentage of the cell. Raise includes all-in actions. The Arena charts specify no raise size. Use the hand lookup for exact percentages. These fixed snapshots do not expose a rake setting.
6-max, 100bb starting stacks, 0.5/1bb blinds. CO faces a 2.5bb open from HJ, with no callers. UTG folded. Players still to act may continue.
Quick tip: The button and blinds can still enter the pot. No one has called the opener at the decision shown here.
Cutoff defending range by the numbers
Fixed reference figures, independent of the chart selected above. First-in comparisons count raises only; defense comparisons count raises plus calls.
For comparison, the GTO solver Button defense range continues 16.1% of hands at 100bb, 6.4 points wider than this seat. Figures count combos: pairs weigh six, suited hands four, and offsuit hands twelve. The opener can differ between defense seats; check each chart’s context.
Now play the spots, not just the chart.
Practice against opponents whose ranges are too loose, too tight, or too passive, and exploit the gap.
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