I solve now problems from the standard problem set at CT in stead of problems from the blitz problem set. That presents me problems which have a 300 points higher rating. Since I want to become 300 points stronger, I wanted to know which problems I encounter when applying the PIF system to higher rated problems.
- Higher amount of PoPs, so it is difficult to choose the critical PoP.
- Higher amount of LoAs, so it is difficult to choose the critical LoA.
- More than one attacking square on a LoA, so it is difficult to choose the critical square.
- Motif assault
- Motif promotion
- Counter attack
- Quiet moves (non CCT)
Higher rated problems contain more problems with the motifs assault and promotion. There is additional knowledge needed to handle these motifs. Theoretically, the preconditions from the Art of Attack of Vukovic should be a great aid here. But I never have internalized that knowledge. High time to make that knowledge more practical. The diagram below shows 6 of the 7 problems mentioned above (no promotion motif). Can you find them all?
|White to move|
k7/1R2R3/pb3p2/qr6/5N1p/2r3P1/PPQ4P/1K6 w - - 0 1
a7, a8, c8, e8
7th, 8th, b file, c file, e file, g2-a8
AS (Attacking Square)
a7, b8, e8, e4, g2, h7
a5 protects c3
b5 protects c3 indirect
b6 protects a7
a8 protects b8
c3 protects c8 by shielding
The new motif here is the the assault of the king. The preconditions state that you need a surplus of 3 extra pieces for an assault. One to sacrifice, and two to deliver mate. Usually the mate is delivered by the queen. Here the surplus is two rooks, so I need to add the queen to the attack. But from which attacking square and why? I gambled wrong.
There is definitely a counterattack going on. This means I must make an attacking move that at the same time defends against the counter attack.
The actual move loads the battery against the king, but further is a non CCT move.