Chen in his book stated that seeing the opponent's hand (mostly during a showdown) is the best information to gain. I want to know how to apply that practically.
What I'm doing now: I have the action ranges of the opponent and plot that on a distribution:
0 - 50 Fold 51 - 75 Check 75 - 100 Bet
and I use that to narrow down my opponent's range. Let's assume the above opponent bets. I then put him on a strong hand. During showdown I notice his hand was crap. So what? Does it even matter?
Since I use his average behaviour from a lot of hands, and assuming that he bets his best hands, I do not understand how to change my distribution of that opponent in any meaningful way.
Considering if he bets more crap hands his betting range will increase, which will enable me to call more; and thus my play adjusts. Currently I do not see how to incorporate his pocket cards - any advice?