I have been struggling with finding a method that would allow me to quickly estimate the boundaries of a hand, in terms of "it is in N% of the best hands", according to Sklansky-Chubukov rankings. I came up with the following. Here is the part of the table that shows hands in descending order of strength according to sklansky-chubukov:
hand | combos | percent | rank | cumulative percent |
AA | 6 | 0.45% | 1 | 0.45% |
KK | 6 | 0.45% | 2 | 0.90% |
AKs | 4 | 0.30% | 3 | 1.21% |
QQ | 6 | 0.45% | 4 | 1.66% |
AK | 12 | 0.90% | 5 | 2.56% |
JJ | 6 | 0.45% | 6 | 3.02% |
AQs | 4 | 0.30% | 7 | 3.32% |
TT | 6 | 0.45% | 8 | 3.77% |
AQ | 12 | 0.90% | 9 | 4.68% |
99 | 6 | 0.45% | 10 | 5.13% |
AJs | 4 | 0.30% | 11 | 5.43% |
88 | 6 | 0.45% | 12 | 5.88% |
ATs | 4 | 0.30% | 13 | 6.18% |
AJ | 12 | 0.90% | 14 | 7.09% |
77 | 6 | 0.45% | 15 | 7.54% |
66 | 6 | 0.45% | 16 | 7.99% |
AT | 12 | 0.90% | 17 | 8.90% |
A9s | 4 | 0.30% | 18 | 9.20% |
55 | 6 | 0.45% | 19 | 9.65% |
A8s | 4 | 0.30% | 20 | 9.95% |
KQs | 4 | 0.30% | 21 | 10.26% |
44 | 6 | 0.45% | 22 | 10.71% |
A9 | 12 | 0.90% | 23 | 11.61% |
A7s | 4 | 0.30% | 24 | 11.92% |
KJs | 4 | 0.30% | 25 | 12.22% |
A5s | 4 | 0.30% | 26 | 12.52% |
A8 | 12 | 0.90% | 27 | 13.42% |
A6s | 4 | 0.30% | 28 | 13.73% |
A4s | 4 | 0.30% | 29 | 14.03% |
33 | 6 | 0.45% | 30 | 14.48% |
KTs | 4 | 0.30% | 31 | 14.78% |
A7 | 12 | 0.90% | 32 | 15.69% |
Now if I memorize the ranking of each hand, then I can divide it by 2 to estimate the boundaries, for example:
AJ => rank = 14, so it's in 7% of best hands!
KQs => rank = 21, so it's in 10.5% of best hands!
etc, etc..
Indeed it's sometimes off by 1-2 percents, but I think it would be really useful in some situations, for example, let's say on live game you noticed that a V opened A2 from MP. You can estimate that he opens 22-23% from this position. Or, for example you know that you can either fold or push 10% in the current situation, so if you hold KTs, it's out of bounds and you should fold...
What everyone thinks?