We have put a lot of effort in the past in the study of the superficial elements of a tactical position. To mention a few findings:
- The PoPLoAFun method
- KITB (king in the box)
- B.A.D. (Barely Adequate Defended)
- Sitting duck
- tactical elements (bummer, were it themes or motifs? I forgot. Again)
- duplo attacks
- war of tempo's
- double whammy
- pawns close to promotion
|Diagram 1. Black to move|
[FEN "3r3r/pp3pk1/2p1b3/6pq/P3Pp2/1P1N1PpN/2P1Q1P1/4RBK1 w - - 0 1"]
First task: find the most salient points in the position.
|Diagram 2. KITB. Black to move|
KITB. The king has a wee wriggle room. g1 and h1. (the green squares)
|Diagram 3. LoA's. Black to move|
LoA's. Follow the arrows.
|Diagram 4. Pawns close to promotion. Black to move|
Pawns close to promotion. At first glance the pawns seem well blocked.
|Diagram 5. Function. Black to move|
Fun. Which pieces have a duty to fulfill?
- Nh3 blocking access to h2 and h1
- g2 protecting the knight. Blockading g3
- f3 protecting g4. Blockading f4
- Ne5 blockading Qc5
- Qe2 protecting the invasion point d2
|Diagram 6. Discovered attack. Black to move|
So how can we brew some concepts from these superficial, for everybody to see, salient points. First we must stitch the points together, then we must ask what can be learned from it that is transferable to other positions? I will give you some time to think and will update later in blue.
First we must stitch de points together.
1. ... g4 is a discovered attack. Immediate loss of wood can only be prevented by 2.Nxg4.
2. ... Bxg4 prevents the interference of the white knight on the c5-g1 diagonal
3.fxg4 resolves the block of f4
3. ... Qc5+ 4. Kh1 Qc3 black threatens to invade with Rd2
A steppingstone moment, I guess.
It might depend on what white does here, but he exchange sac Rxh3+ seals the deal.
Which analogies, concepts or categorizations (3 flip-sides of the same coin, yeah I know, bad metaphor ;) are transferable to other positions? I reckon the following:
- The possibility to unblock the pawns make them extremely powerful
- All salient points play a role
- The LoA's reveal the potential coordination of the pieces
- The Fun shows how whites pieces are tight to duties
- The shift of the Queen from a LoA to an invasion square (Qc5 - c3) is extremely powerful
- The exchange sac that unblocks the g pawn is deadly
- All non salient points need no attention