My approach at the moment might look a bit haphazard. But I don't want to lose momentum by trying to over organize things too much now the juices are flowing. The tempo battle differs from the LoA battle. It has a different focus. In practice both battles will intermingle. But at the moment I want just to  inventorize the pillars under the tempo battle. The LoA battle is more focused on space.

A clear pillar is the multipurpose move. And a multi purpose is based on time, not space. You do two attacks while the opponent can only defend against one.

Robert provided this position:

 Black to move

4r1k1/1b2qppp/1pr2n2/pN1p4/3P4/P4P1B/1P4PP/2RQR1K1 b - - 0 1

Here Re1 is BAD. It is attacked twice and defended twice. Rc1 is not BAD, since it is attacked once and defended twice.

So the logic focuses in on Re1. By taking on c1, you take a defender away from e1.

The main task of logic here is to prune the tree of analysis. The logic starts with the only BAD piece on the board. There are no candidates for black, since the only way to change the balance of the BAD piece is to eliminate a defender.

If white just takes Rc1 back, his BAD piece Re1 changes into an under-defended piece.

So only now there is a cause to contemplate alternatives for white. There is only one: white can try 2.Rxe7. But since 2. ... Rxd1+ comes with check, white has no time to cash in. So it is the check that makes that the counter attack does not work. By force of tempo.

How should system 1 and system 2 work together in this position ideally?

• system 1 must provide the only BAD piece and the defender.
• system 2 must provide the logic that prunes the tree of analysis to only two branches.
• system 2 must bridle system 1 to prevent it from mindless trial and error

When are we ready with this position? When system 1 is able to see the BAD piece and the defender as such. That was the part that was missing in my story until now.

In claymans terms:

• system 2 decides to focus on a feminine face
• system 1 must see the face before the minds eye
• system 2 must ward off the apes and the hippopotamuses
Hence the mind's eye might be crucial here.

1. FEN: 3r1rk1/p2n2pp/2p1bp2/1p6/1P2PP1B/3R2P1/2P1B2P/1K1R4 b - - 0 23

What happens when one player ignores [or, more likely, does NOT “SEE”] the critical B.A.D. square? It does not end well for him.

The d7-square is the only B.A.D. square. The BNd7 is pinned against BRd8, giving White indirect superiority on d8. I guess that Black assumed that a counter-pin would get him out of trouble, forgetting that after 23… Bc4??, White has “the right to move first” by initiating a favorable exchange sequence that is NOT a tit-for-tat. From the frying pan into the fire!

It is essential to be aware of such things BEFORE making each and every move. It is not that hard to find the B.A.D. squares (in this case, a single one)!

Multi-functional moves (in the broadest sense, GM Averbakh’s “double attack”) must be “SEEn” for BOTH players! It doesn’t matter if it is two direct attacks on one or more pieces, or two threats, or some combination of direct attacks and threats (whether 1st order, 2nd order, etc.).

As Temposchlucker put it: “You do two attacks while the opponent can only defend against one.

From lichess.org: Puzzle #N0KzW

From game 10+0 • Rapid
White: Qosmis (1708)
Black: rc_jinhlawng (1767)

1. e4 e5
2. Nf3 Nf6
3. Nc3 d6
4. d4 Be6
5. a3 c6
6. Bg5 Be7
7. dxe5 dxe5
8. Qxd8+ Bxd8
9. Nxe5 O-O
10. f3 Bb6
11. Na4 Nbd7
12. Nxd7 Nxd7
13. O-O-O f6
14. Bh4 Be3+
15. Kb1 b5
16. Nc3 Nc5
17. b4 Nd7
18. Rd3 Bf4
19. g3 Be5
20. f4 Bxc3
21. Be2 Bxb4