Pluribus Poker Preflop Defense Detailed part 2 of 2

Poker preflop defense strategy from the blinds

So continuing on poker preflop defense,in part 2 we focus on defending the blinds. I recapture the frequency chart here as we need to refer to it on a regular basis. Also because SB vs BB is more specific due to the limps from the SB, we’ll have a separate post on it.

poker preflop defense frequencies

So the main difference defending from the small blind is the size of the 3bet but we’ll cover sizings in a separate post as it requires specific attention. Also we noticed already that Pluribus calls (vs 3bet) a lot more from the SB than “current best practice”. Anyway let’s look by aggressor position.

SB defense strategy

On SB vs LJ with 11.3% defend, we need 150 tuples. On SB vs Button we’ll have 331 tuples. Against HJ and CO we’ll be pretty much linearly in between, so won’t look at details.

SB vs LJ
SB vs Button

So what can we infer on ranges from the Small Blind ?

  • Ranges not really different than from position
  • 22+
  • T9s+ even against early, but the worst ones sometimes fold
  • A2s+ as well, sometimes fold on the “so so” ones.
  • 54s+ against early, apparently no fold
  • AJo+ against early position
  • Against the button we add:
    • K7s+
    • Q8s+
    • ATo+, KJo+, QTo+, JTo, those getting some folds

Small Blind key learnings from Pluribus

Honestly who is really confident / happy of their SB defense strategy ? Not me anyway. Upswing Poker ranges recommend 3bet or fold, no call with a range pretty similar to Pluribus although less aggressive. Poker Snowie also recommends almost only 3bets without any medium/low suited connectors.

  • More calls than 3bet, except balanced against button
  • Mix all over (except super premium) between call and 3bet
  • Sometimes fold the worst hands of the range
  • Many suited connectors all the way to K7s, Q8s
  • Many Broadways
  • 5x 3bet size but that’s a different post.

Big Blind defense strategy

As said before, we don’t cover BB vs SB here as it is really different. So the Big Blind as expected defends a lot and mostly calls: 25% to 50% , that’s 330 to 663 tuples… a lot. To be honest ranges are going to be pretty obvious and not really important. Let’s look at the hands played against the LJ and the button:

Against LJAgainst Button
TupleCall3betFoldTupleCall3betFold
AQs 120AKs 010
A9s 100AJs 020
A7s 100A9s 200
A6s 100A7s 100
A4s 100A6s 100
AKo 101A5s 100
KTs 011A3s 200
K8s 200A2s 101
K7s 110AKo 040
K6s 100KK 010
KQo 110KJs 200
QJs 012K7s 200
QTs 011K5s 200
Q8s 101K4s 200
Q7s 101K3s 400
Q4s 100AQo 030
Q3s 102KQo 221
Q2s 100QQ 020
AJo 201QJs 200
KJo 200QTs 100
QJo 200Q9s 200
JJ 200Q7s 200
JTs 100Q6s 100
ATo 200Q3s 200
KTo 101Q2s 100
QTo 300AJo 200
JTo 401KJo 900
T9s 100QJo 012
T8s 100JJ 030
T7s 100JTs 020
A9o 302J9s 110
J9o 201J8s 202
T9o 101J3s 100
99 100ATo 100
98s 100KTo 010
96s 100QTo 301
95s 100JTo 302
A8o 201TT 020
T8o 103T7s 200
98o 104T6s 100
85s 100T5s 100
84s 200T4s 100
97o 105T2s 100
87o 202A9o 300
77 300K9o 011
76s 100Q9o 102
76o 101J9o 010
66 100T9o 410
65s 01199 101
75o 10398s 200
65o 10296s 100
55 20095s 200
54s 010A8o 300
53s 100K8o 200
43s 101Q8o 200
42s 100T8o 301
53o 10398o 100
33 40085s 100
22 10082s 101
A7o 100
K7o 201
Q7o 203
T7o 101
87o 103
75s 100
73s 100
A6o 302
Q6o 102
76o 300
65s 020
63s 100
62s 200
A5o 010
K5o 302
65o 201
55 200
A4o 201
64o 102
54o 401
44 400
42s 200
A3o 401
33 102
A2o 200
22 200

Well the least we can say is the ranges are very mixed between call and fold and some 3bets. 99 or 33 are sometimes folded, 82s can be called or folded, A5o is 3bet once etc. But overall strategy is similar to what we’re used to.

Just in case, I also checked defense strategy relative to size of opening of Villain. But as you can see, not much of an impact (or opposite really):

Size of RFIFace RFIBB DefendDefend %
2BB1526845%
>2BB – 2.25BB62730048%
>2.25BB_2.5BB21111153%
>2.5BB-3BB1418258%
>3BB247156%

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