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Preflop I'd give both SB and MP a range of pairs, suited aces, AT+, broadway, and all sc's. Probably that's a bit wide but they could have any of those hands.
On the flop, SB checks, you pot it, MP calls, CO folds, and SB jams in a huge pot. You and MP both have like 250 bb behind.
So we need SB's 'check/jam in a huge pot multi-way' range and MP's 'flatting a psb' and 'calling a shove' range in order to check the EV of going with it. We don't have to shove of course but it makes the EV calc doable.
I think SB could check/jam with any A, any flush draw, and even some broadway gutters, but let's give him only the two pairs from his original range, a pair of aces with J kicker or better, all the bigger made hands of course, broadway sfd's, and broadway Txhh.
Let's say MP flats with AJ, two pair or better, or any flush draw, and calls a shove with AK, made hands that beat us, and sfd's (which include all his nfd's as well).
What is the EV of a shove?
After his flop call, MP's range is: AA,TT,22,ATs+,A2s,KhQh,KhJh,QhJh,KhTh,QhTh,JhTh,Th 9h, 9h8h,8h7h,7h6h,6h5h,5h4h,4h3h,3h2h,AJo+, which is 45 combos after card removal.
So MP folds 26 of his 45 combos and calls a shove with a range of: AA,TT,22,AKs,ATs,A2s,KhQh,KhJh,QhJh,AKo, which is 19 combos.
So your fold equity agains MP is 58%.
Your equity against SB is 50%:
http://www.pokerstrategy.com
Board: Ah2hTs
Equity Win Tie
SB 49.83% 42.70% 7.13%
BB 50.17% 43.04% 7.13%
and your equity against both together is 14%:
http://www.pokerstrategy.com
Board: Ah2hTs
Equity Win Tie
MP3 54.78% 48.32% 6.45%
SB 31.47% 29.41% 2.07%
BB 13.75% 6.50% 7.25%
Before the shove the pot is 5.20 + 4.40 + 4.40 + 11.25 = 25.25. We have 24.50 behind, MP has us covered, and it is 6.85 to call SB's shove.
After we shove and get called by MP the pot is 25.25 + 24.50 + 24.50 = 74.25.
EV(we jam and MP folds) = .5(25.25) - .5(6.85) = $9.20.
EV(we jam and MP calls) = .14(49.75) - .86(24.50) = 6.97 - 21.07 = -$14.1
So altogether the EV of a shove is:
.58(9.2) - .42(14.1) = 5.34 - 5.92 = -$0.58.
So it's pretty marginal. I think our EV is actually a little higher with the spaz factor but it's clearly marginal. Altogether it looks like folding is best. Or if you just love variance you could also call. It would be pretty awesome to be sitting on a 750 bb stack. Defo screenshot-worthy.
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