Assign Your Opponent's Range - Not Your Own[ return to main articles page ]

By: grapsfan
Published on Sep 8th, 2009
Jennifear’s latest article got me thinking about the biggest leak in my game, as I’m sure it did for many of you. Most poker games, especially No Limit Hold’em, are about putting your opponent on a range of hands, then deciding on a course of action for the likelihood of each hand within that range. Determining how your opponent thinks and plays, as Jennifear suggests, is the key to making an accurate assessment.

My leak is I assign ranges based on how I would play the hand in their shoes, not how they themselves would, based on my perception of them. A recent hand from a 27-man SNG provides a perfect example.

It’s Level 2…the blinds are 15/30, and going up to 25/50 in a couple minutes. I have just about my starting stack of 1500 chips. The table has been fairly tight, at least by the standards of a normal 27-man SNG. The biggest stack at the table doubled up early after flopped top two pair on a K-J-4 board, and got paid off by A-K. He’s fluctuated some since then, playing more hands than anyone else at the table, but isn’t freely donating.

I have T T in middle position. UTG raises to 90, and UTG+1 calls. I choose just to call with my tens, rather than re-raise and find myself in a difficult position if someone shoved. Both blinds also called, including the big stack in the small blind, making the pot 450.

The flop was 9 2 2. The small blind shoved, putting just over 3000 chips in a 450-chip pot. The big blind, original raiser, and UTG+1 all folded, leaving the final decision up to me. I have about 1400 chips to call to win 1850, getting a price of about 4:3 on my money. If I’m ahead a little more than 40% of the time, I’m good from a chip value perspective. I also understand the value of needing to double up in this level or the next, or I will find myself short-stacked with 50/100 blinds.

So, with what hand would someone shove like this? My first thought is, “He doesn’t have a deuce.” If he flopped trips, I would expect a value bet…or more likely at smaller stakes, a check, hoping the UTG player continuation bets and he can check-raise with his big hand. Instead, there’s a scared-looking shove, which doesn’t make sense with a big hand. The same logic goes for the even more unlikely case of nines-full.

What’s left? The next worst case, for me, is something like two club overcards, something like K Q or A J. This gives him 14 outs, since I have the 10, meaning we’re about 50:50. He could also have some Ace-rag club draw (11 outs), and I’m a 60:40 favorite. Or something like A 9x, for 5 outs plus a backdoor draw, and I’m 80:20 ahead…I’m hoping for this situation, obviously.

Let’s assign range possibilities of 50% for the two over-clubs, 30% to the Ace-rag club draw, and 20% to the hand I have crushed. He has 25% equity in the first case (50% times 50%), 12% equity in the second (30% times 40%), and a 4% equity in the third (20% times 20%). So, I think he’s approximately 40% to win the hand…15% less than what I need. Sweet.

Of course, I don’t explicitly think all of this in the time frame allotted to me in an online tournament. My actual thoughts are three-fold:

1) I need to be about 45% to win overall.
2) He doesn’t have a deuce.
3) I’m better than 45% against everything else.

So I call. My opponent turns over ace-deuce for flopped trips, I don’t catch my 2-outer, and that’s the end of that...

Why did I take something like A2 or K2s out of his range? Because I would never play trips that way. I try to “never say never” when it comes to playing a hand a specific way – I don’t want to limit myself and block a way to get extra value out of a hand. But I don’t think shoving is the way to go here…unless the goofball last to act is me.

In a game like a $10 or $20 27-man SNG, many players are going to be scared any time there’s a flush possibility on board. The thought of maximizing the value from their hand is overwhelmed by the need to “protect” it. To be fair, I should also give some amount of accounting for the possibility of “you don’t think I think I should shove with trips, therefore, I’m shoving” 3rd-level thinking.

If we make new range assignments of 30% to trips, 30% to the two-overclubs, 30% to the ace-rag club draw, and 10% to A-9…we get 27% + 15% + 12% + 2% = 56%. What was a clear call is now a borderline fold. All because I assumed my opponent would play the hand similarly to the way I would.

When you go through hand histories and re-examine some of your tough decisions, be honest. Put yourself in their shoes. Play hands through your opponent’s eyes, not your own.

grapsfan

---

Recent Articles by grapsfan

Mixing Business with Friendship in Poker

The More I See, The Less I Know

Book Review: Check-Raising The Devil

Edges in Poker

Positively Fifth Street Revisited

Badugi! Badugi! Badugi!

Comments

  1. <p>Wrong, wrong, wrong...oh, so wrong.</p>
    <p>Now you're second-guessing yourself when you shouldn't!</p>
    <p>Unless you're playing against some super smart nth-level thinker who has you pegged for "STUPID", nine out of 10 times the villain's showing you A9 or a flushdraw here.</p>
    <p>Stop being results oriented! :)</p>
    <p>Brann</p>
  2. <p>meh, i disagree w/ this article</p>
    1 
  3. <p>Are you advocating a fold then? Your original reasoning still holds- this is a snap call given the context. This looks extremely results-oriented to me. The fact is 99% of players, especially in this type of game, won't play the "deuce" that way. If you were faced with that exact same situation again you still should not fold... </p>
  4. <p>IMO The article isn't about the outcome of the hand, its about how  he assigned his opponent's range and why his decision might be different if he had taken his own game out of the picture. Look carefully, I doubt seriously he would assign trips at 30% here but that number does illustrate his point quite well. I'm sure the number was chosen for dramatic affect. </p>
    <p>Don't get so lost in the answer that you cant find the question. </p>
     
  5. <p>He's not advocating a fold necessarily. He is just pointing out that you can not take a deuce out of his range. First of all he is in the blinds so a deuce is very likely and I see people shove trips here all the time. So if the guy hasn't gotten out of line or doesn't play draws aggressively then a fold is not out of the question.</p>
  6. <p>The example could be better, but the lesson (people play hands differently, so don't assume their range matches yours) is valid.</p>
  7. <p>The example overshadows what is an excellent lesson.</p>
  8. <p>Interesting read. </p>
    <p>I personally would give serious consideration to an all-in preflop re-raise, at least 50% of the time, in the situation you described.</p>
    <p>Players in these low buyin SnG's often raise preflop with with low pairs and weak aces. You are only behind to 4 hands - J's thru A's. If these hands call you, great and you are the favorite to double up. If they all fold, you win a nice pot and add to your stack.</p>
    <p>If you face an overpair, such is life. Register for the next SnG.</p>
  9. <p>I agree with the premise of the article.  It's important to understand that people don't always play like you do, and to see things through your opponent's eyes.</p>
    <p>Like the other commenters, I also call in the situation that graps' laid out.  I like assigning 10-20% to the 222 (it IS a multi-way pot after all, so there is indeed more chance that the 2 is protecting), and maybe 30-40% to the 9 (not necessarily A9, this could be 98).  The rest to clubs.</p>
    <p>If you look at the comments, I think that each of us assign different ranges to the villain.  I think this supports graps' main point.  A lot of players will look at the same hand and think different things.  It's up to us to determine what our opponent might be thinking, and to account forthe possibility that our opponent is taking a line that we would never personally take.</p>
    <p>The title says it all.  Assign your opponent's range, not your own.</p>
  10. <p>I also agree with the premise, but I think the example is a very bad one.</p>
    <p>Obv snapcall!</p>
    <p>It's obviously an important thing to consider that you are playing against your opponent, not against yourself. </p>
    <p>Anyway, I really like your articles and I'm happy every time I see your face on the main page, so keep doing plz :)</p>
  11. <p>1 question, I spent time at these $10 $20 buy-in 27man 18man 9man SNG's.  Maybe not as much as most or near but 1 thing I notice a standard raise or call with 10s and better you are asking for trouble.  There are to many players willing to limp or call a small raise with total junk just cause they dont know any better or it is their style.  I realize you dont want to end up agaisnt aa-jj but Why would you put yourself at risk here in such a scary position only starting at 1500 chips?  Thanks  JEN, GRAP, any one give me feedback here.</p>
  12. <p>You guys did happen to notice that I picked numbers (specifically the 30% on a deuce) which turned the numbers from a snapcall to a borderline fold.</p>
    <p>In reality, I'm probably leaning more toward 10% on a deuce, 60-70% between the two club draws, and 20-30% toward A-9.  But those numbers don't make the discussion as interesting.</p>
    <p>Thanks for reading, everyone.</p>
     
    Thread Starter
  13. <p>graps, why would a you just smooth call preflop with 1010 on this level? pure math, position, get more in the pot?  It appears as a chip burner in this POS on this level. Thanks</p>
  14. <p>Personelly loved the article, Great Stuuf</p>
  15. <p>If were assuming that they aren't great thinking players, i've seen plenty of people at this level even smooth in the SB with AA, not that i would recommend it, or even 88 or 77 i've seen shoved in this spot at this level.  Not that shoving is a way to play it out, but JJ isn't a horrible hand to have in his range as well...just putting it out there..</p>
  16. <p>i feel like i was in this hand or at least at the table while this happened?? is there anyway to verify that...this hand seems so familiar- i think i saw you make a call like this and i was surprised you made it and got eliminated so early in the first levels because ive been seeing a lot in the 27 mans lately...</p>
  17. <p>edit: "you a lot lately"</p>
  18. <p>I'm such a grapsfan mark</p>
  19. <p>Why is this a snap call?</p>
    <p>No one is taking into account JJ+ on villain´s range not even OP.</p>
    <p>Really,so so bad.</p>
  20. <p>how is having 56% equity here make it a borderline fold? I understand what you're trying to say but if you have 56% equity against a really strong range folding is just dumb in this spot. ever. </p>
     
 
Page 1 of 21 2

Return to Articles

Quick Navigation