Chess language

 The past 21 months I absorbed 2571 patterns. What have I learned?

Tactical themes form a language. There are only about 60 themes (30 mates, 30 motifs like pin etc.), so that are not an awful lot of words to learn.

The problem lies in recognizing (seeing) the themes in all circumstances. At average I have absorbed 2571 / 60 = 43 patterns per theme.

And slowly a new factor starts to emerge. You can only visualize what you have absorbed. In order to visualize a combination that exists of 3 themes, you need to be able to see the 60 x 60 x 60 patterns.

There are 60 x 60 x 60 = 216,000 combinations of 3 themes. You cannot calculate this. But if you can recognize the 60 themes UNDER ALL CIRCUMSTANCES, than you can visualize any combination.

If I remember well, Dan Heisman told that when he was 18, he often had opponents who stopped calculating halfway a combination. He used that to concoct a theory about calculating until quiescence. Which is a typical description by system 2 of a system 1 phenomenon. It is totally useless, because it distracts you from the main problem and asks you to do what can't be done by system 2.

What does this caveman math tell us?

If you know what you are after, it is easier to see whether you are on the right track. Then it doesn't bother you to be busy with only one theme for weeks on end, since there are only 60 themes. There are a lot of subtleties, especially concerning the intersection between themes.

What am I talking about?

White to move

3r3r/1pk2p1p/2p1p1p1/b2n1q2/3P1P2/P1PQ3P/2BB2P1/3R1R1K w - - 0 1

Can you can describe all themes and the intricacies concerning the intersection between the themes?