PreFlop Camp — free GTO preflop poker trainer中文
Against a cutoff open you defend about 29% of hands from the big blind — 3-bet roughly 6% (TT+, AQs+, A5s–A4s, AQo+, KQs) and call about 24%. Much tighter than against the button, because the cutoff opens 29% instead of 51%.
| AA | AKs | AQs | AJs | ATs | A9s | A8s | A7s | A6s | A5s | A4s | A3s | A2s |
| AKo | KK | KQs | KJs | KTs | K9s | K8s | K7s | K6s | K5s | K4s | K3s | K2s |
| AQo | KQo | QJs | QTs | Q9s | Q8s | Q7s | Q6s | Q5s | Q4s | Q3s | Q2s | |
| AJo | KJo | QJo | JJ | JTs | J9s | J8s | J7s | J6s | J5s | J4s | J3s | J2s |
| ATo | KTo | QTo | JTo | TT | T9s | T8s | T7s | T6s | T5s | T4s | T3s | T2s |
| A9o | K9o | Q9o | J9o | T9o | 99 | 98s | 97s | 96s | 95s | 94s | 93s | 92s |
| A8o | K8o | Q8o | J8o | T8o | 98o | 88 | 87s | 86s | 85s | 84s | 83s | 82s |
| A7o | K7o | Q7o | J7o | T7o | 97o | 87o | 77 | 76s | 75s | 74s | 73s | 72s |
| A6o | K6o | Q6o | J6o | T6o | 96o | 86o | 76o | 66 | 65s | 64s | 63s | 62s |
| A5o | K5o | Q5o | J5o | T5o | 95o | 85o | 75o | 65o | 55 | 54s | 53s | 52s |
| A4o | K4o | Q4o | J4o | T4o | 94o | 84o | 74o | 64o | 54o | 44 | 43s | 42s |
| A3o | K3o | Q3o | J3o | T3o | 93o | 83o | 73o | 63o | 53o | 43o | 33 | 32s |
| A2o | K2o | Q2o | J2o | T2o | 92o | 82o | 72o | 62o | 52o | 42o | 32o | 22 |
3-betCallMixedFold
3-bet: TT+, AQs+, A5s, A4s, AQo+, KQs
5.6% of hands (74 combos)
Call: 22-99, A2s-AJs, K7s-KQs, Q8s-QJs, J8s-JTs, T8s+, 97s+, 86s+, 75s+, 65s, 54s, ATo+, A5o, KTo+, QTo+, JTo
23.5% of hands (312 combos)
The rule that generates every big-blind defending range is simple: defend against strength, not against position. The cutoff opens 29% of hands versus the button's 51%, so the average hand you face is materially stronger. Your pot odds have not changed — you still need about 22% equity — but the equity your junk hands have against a 29% range is much lower, so the defending range shrinks by about half.
The other reason to tighten: there is still a player behind you (the button) who can squeeze. When you call wide from the big blind against the cutoff, you are not just facing the cutoff — you are inviting the button into a pot where you are out of position to both of them.
The 3-betting range narrows accordingly. A5s and A4s stay in as the bluffs (same blocker logic as against the button), but the value portion tightens to TT+ and AQ. KJs and AJo, which are 3-bets against the button, become calls here — they are dominated too often by the cutoff's tighter opening range.
About 29% in 6-max — roughly 6% as a 3-bet (TT+, AQs+, A5s–A4s, AQo+, KQs) and 24% as a call. That is roughly half as wide as your defence against a button open, because the cutoff's opening range is about half as wide.
Because the cutoff opens a stronger range (29% versus the button's 51%), so your marginal hands have less equity against it — and because the button is still to act behind you and can squeeze. Both effects push the same way: tighten up.
BB Defence vs Button Open (6-Max)BB Defence vs UTG Open (6-Max)UTG Opening Range (6-Max)8bb Push/Fold Chart (9-Max Nash)
Cash-game ranges are a curated GTO reference, drilled question-by-question in the trainer. The mixed band lists hands solvers play only part of the time.