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Preflop Equity in your Head

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Preflop Equity in your Head - Wed Mar 30, 2011, 11:12 AM
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Delliks's Avatar
Since: Jan 2010
Posts: 11
BronzeStar
I've worked out a system that can easily be done at the table, involves a little memory work though.

My maths sucks and my memory is not good but it's working for me so far.

It has Pros and Cons

Cons
It's using PokerStoves ranges
Will take one or two hours to learn
It's not 100% accurate - Some spots it's 100% accurate, other spots it can be 1% to over 10% off.

Pros
Gives you a better guideline of equity
Gets you thinking about ranges and equity
Some spots are 100%
We can work this out at the table in seconds in our heads.

Steps

1) Memorize some hands vs a 4% range. I actually memorized 21 hands vs a 4% range, AKs, AQs, AJs, ATs, A9s, A8s, A7s, KK, QQ, JJ, TT, 99, 88, 77, KQs, KJs, KTs, QJs, JTs, T9s, 98s. This was actualy pretty easy, I put them all in a table as below:

vs 4% range
1st Row Aces AKs, AQs, AJs, ATs, A9s, A8s, A7s
Equity 45% 37% 34% etc etc
2nd Row Pairs KK, QQ, JJ, TT, 99, 88, 77
Equity 68% 56% etc etc
3rd Row Rest KQs, KJs, KTs, QJs, JTs, T9s, 98s
Equity 33% 32% etc etc

21 hands in total vs a 4% range
You may have a good memory and find it easy to remember 21 hands vs a 4% range, I used mmnemoics, pictures and linking. If you want a copy of my table and memory tricks in work just PM me.

2) OffSuit - Once id memorized the above table I'm using the rule of Minus4. Taking 4% equity off for any non suited hand.

e.g we know from the table that we learned above that KTs vs 4% = 31%
KTo v 4% = 31% - 4% = 27%
our guess is 27% the actual answer is 27.6% which in this case is very close,

3) Other Equity Ranges - Now that we know KTs vs 4% gives us 31% equity, but what if it's KTs vs 10% range? Well I simly add the range to our equity. 31% + 10% = 41%
our guess is 41% the actual answer is 37.3% which again is pretty close.

4) Other Hands not in the table - Again I'm using the rule of minus4+minus1 per hand

Example in the table we know the equity for KTs but not K9s.
Using the minus4 rule would be 31% - 4% = 27% actual answer is 28%
K8s would be 31% - 4% - 1% (as it's 1 hand off the table)
26% actual answer is 27.95%
K7s would be 31% - 4% - 2% (as it's 2 hands off the table)
25% actualy answer is 28.23%

More examples:
J6s vs 15%
We know JTs vs 4% = 32%
so would be 32% + 15% = 47% - 4% -3% = 40%
our guess 40% actual answer 31%

Q9o vs 11%
We know QTs vs 4% = 33%
33% + 11% = 44% - 4% - 4% = 36%
our guess 36% actual answer 30.5%

66 vs 20%
We know 88 vs 4% = 31%
31% + 20% = 51% -4% -1% = 46%
our guess 46% actual answer 46.9%

A7o vs 30%
We know A7s vs 4% = 30%
30% + 30% = 60% -4% = 56%
our guess is 56% actual answer is 46%

A4o vs 20%
We know A7s vs 4% = 30%
30% + 20% = 50% -4% -4% -3% = 39%
our guess is 39% actual answer is 42%

Overview:
1) Learn Table
2) Learn rules

Rules:
Off suit hands - Minus 4
Other ranges - add new range to current result
Hands not on table - Minus 4 plus minus 1 per gap from table

As you can see from above the results are not spot on, but this can help us calculate a guesstimated equity in our heads at the table in real time, plus the benefit for me at least is I'm thinking about equity and ranges more.

You can download my word document here:
http://rapidshare.com/files/455107050/LearnRanges6.doc
 

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