I had the same question when I first looked at it. Have no idea what it is, and I am not sure what CAP is either.
However, when I looked at the chart I figured it is not really that good of a chart at all. For example, limping pre-flop in 6-max is suicidal especially from UTG, so for example A2s-A8s is not a call IMO, either bet and put pressure or fold.
Same goes for ATo, which is also never a limp from UTG but always a bet..
Maybe it's just my play style, and the chart is actually good... Would be cool to know who created it to ask all this directly!
C = call
R = raise
< = smaller than
> = greater than
Notice that the chart numbers the position from 1 to 6 (hence, 6-max,).
And that chart only posts action codes greater than 2 and smaller than 4.
So, calls and raises are function of the position AND the number of Big Blinds (poker talk for $).
More probable interpretation:
with 99 UTG(3), if no one raised (NR) then raise with less than 2BB (R<2)
Less probable interpretation:
with 99 UTG(3), if no one raised (NR) then raise if less that 2 players are in the hand (R<2).
i personally dont take such charts TOO serious because they often for example say that you should fold small pocket pairs in early position . i am not doing that ....i will see the flop as cheap as possible and try to hit my set etc