Take the first hand (never bet on the first hand)

So suppose it's B.

Now bet it's opposite which is P. If you win here, stop and just let the third hand play out.

Suppose you lost and it was B again, bet for P.

The worst thing that can happen is either BBB or PPP because you will lose 2 bets whatever your MM.

So here are a few betting trigger examples.....

B comes first.....bet for P.

P comes....a win, now let the third hand play out and start again.

P comes first....bet for B.

P comes again....a loss, now bet for B which is the opposite/chop of the second hand.

P comes again.....another loss and the end of the three hand group, start again.

B comes first....bet for P.

B comes second....a loss, now bet for P which is the opposite/chop of the second hand.

P A win. Now start a new three hand group.

I think that should explain it.

cheers