CO Open – All Stack Depths
Default preflop ranges for the CO Open spot in 6-Max MTT at every stack depth, from the RangerPro library.
The Cutoff is the first truly advantageous position. With only the Button, SB, and BB behind, steals become profitable and suited connectors start joining the range.
Opening (raise first in) sets the pace for the hand. Your open-raise range defines which hands are strong enough to voluntarily enter the pot and face potential 3-bets.
Default range at 100bb
compare_arrows Range by Stack Depth
| Stack | Hands | Width | |
|---|---|---|---|
| 100bb |
|
47.9% | View arrow_forward |
| 50bb |
|
47.3% | View arrow_forward |
| 25bb |
|
46.2% | View arrow_forward |
| 20bb |
|
40.2% | View arrow_forward |
| 19bb |
|
34.9% | lock Pro |
| 18bb |
|
33.1% | lock Pro |
| 17bb |
|
34.3% | lock Pro |
| 16bb |
|
33.1% | lock Pro |
| 15bb |
|
33.1% | lock Pro |
| 14bb |
|
33.1% | lock Pro |
| 13bb |
|
33.1% | lock Pro |
| 12bb |
|
34.9% | lock Pro |
| 11bb |
|
40.8% | lock Pro |
| 10bb |
|
35.5% | lock Pro |
As stacks get shorter, the CO Open range tightens. Speculative hands lose implied odds value and the range converges on premium holdings. The table above shows exactly how many hands are included at each depth.
help Frequently Asked Questions
Why is the Cutoff range significantly wider than HJ? expand_more
The CO only has the Button, SB, and BB behind — three players to get through. This dramatically increases steal equity and justifies opening weaker suited hands and more offsuit broadways at 100bb.
Should I adjust my CO range based on the Button player? expand_more
Absolutely. If the Button is an aggressive 3-bettor, tighten your CO range to hands that play well against 3-bets. If the Button is passive, widen aggressively to steal the blinds.
What is the optimal raise size from the Cutoff? expand_more
In MTTs, 2–2.5x from the CO is standard at deeper stacks. At 25bb or less, a min-raise (2x) is most common, preserving stack flexibility while still applying blind pressure.
These ranges are theoretical approximations provided for study purposes only. They do not guarantee results. Adapt them to your own game and opponents.
Study this range interactively
Sign in to RangerPro to explore this range with drag-paint, frequency sliders, and the tight/loose modifier.