Originally Posted by the4bettingmonk
How much a percentage amount does having a given card reduce the odds that they`ll have it? Lets use the scenario set out in OP as example. Obviously im asking about this with regard to weak aces.
I'm not sure I understand your question but...
If you have an Ace blocker you will reduce the amount of AK combos from 16 to 12, so it is 25% less likely that they have that particular hand.
An ace blocker reduces the amount of AA combos from 6 to 3, so it is 50% less likely they have aces.
Assigning the previous range of ATo+,ATs+,66+ ,
there are 64 combos of ATo+,ATs+, you reduce this by 16 combos
there are 54 combos of 66+, you reduce this by 3 combos
118 combos without the blocker, 99 combos with the 1 Ace blocker.
Each opponent is 16% less likely to have this range.
KQ is a much more powerful blocking hand when Villain's range for continuing is super strong (QQ+,AK) , as shown in OMGClayDol's example, KQ reduced the chance of at least 1 of 3 opponents having a calling hand by a lousy 1%
A-x works way better as a blocker when Villain actually has a lot of A-x hands that are willing to continue.