Kasparov's Calculations - Mindboggling!!! (very instructive)
Why Chess Stack Exchange recommends it
Chess Stack Exchange users link it as a primary source for Kasparov's own explanation of his attacking calculation against Karpov, including his remarks on counting attacking pieces.
Recommended by 1 people across 1 different months, 2016 to 2020.
What it is
A short chess video in which Garry Kasparov explains how he calculated the variations after his knight sacrifice against Karpov in the 1990 World Championship match in Lyon. It is a clip of Kasparov's own analysis, uploaded by the GJ_Chess channel and framed as instructive for calculation technique.
What people said
Recommends padawan · 2016-01 · Chess Stack Exchange · on “Could Karpov defend against Kasparov in 1990 championship?”
I have watched this [this video] video, where Kasparov explains the variations after his knight sacrifice. However, the position he analyses starting from 3:08, I think I am missing something. Kasparov vs Karpov, 1990 World Finals [FEN "r3qb1k/1b4p1/p2pr2p/3n4/Pnp1N1N1/6RP/1B3PP1/1B1QR1K1 w - - 0 1"] 1. Nxh6 Rxh6 2. Nxd6 Qxe1+ 3. Qxe1 Rxd6 4. Qe4 Nd3 What if black plays [FEN "r4b1k/1b4p1/p2r4/3n4/Pnp1Q3/6RP/1B3PP1/1B4K1 b - - 0 1"] 1... Nf6 instead of Nd3? Can't he both attack queen and defend h7 square? His chances of survival is so low, obviously, but I think Nf6 is better than Nd3, and worth analyzing.
Cites Pablo S. Ocal · 2017-10 · Chess Stack Exchange · on “Counting attackers and defenders, which pieces count?”
@user1583209 It is not a rule, as the OP correctly describes, it is just an idea to estimate whether an attack will be successful. Probably the most famous instance of this kind of reasoning is done by Kasparov playing against Karpov [this video] .
Cites KnightFork · 2020-08 · Chess Stack Exchange · on “Kasparov quote on the simple math behind attacking”
Finder's credit goes to Akavall. Kasparov's explanation of how he calculated an attack against Karpov appears to be the origin of the quote I've seen referenced. [this video]
Cites Akavall · 2020-08 · Chess Stack Exchange · on “Kasparov quote on the simple math behind attacking”
There are a few things that Kasparov said in this video, about attacking that includes the piece counts: [this video]