The Mighty Gajah

with all respect to erveryone, but I think when someone put a puzzle in the forum, I believe it's the right for everyone to see it and try solving it WITHOUT any spoilers,esp, avery hard one, or a one that has beautiful solution. when someone try to be a smartass her and put the solution, it's really not funny, I know many folks here figured out the key ,yet they remain silent out of respect..please dont do it,,,thanks

esp, a lot of people didn't solve it at the beginning, but they decided to read the comment for some hints (with a lot of mate thanks to them provided) so, it's their right not to be spoiled by someone writing the answer here,

This is wonderful, and it's refreshing to hear that multiple engines miss the "key"!

Where did you find this, S's? It's very hard to fathom.

I had this puzzle many years ago, someone showed it to me, very recently I have been told by LM AdmiralA that it's composer is Mario Matous...
I remember burning a lot of time for it until I got crazy and tried everything till the amazing moment arrived when I figured it out :)

Indeed beautiful and rather unexpected victory for white. I think engines cannot find this move, because they focus purely on material points, and this one is ... just human move, human mind is beyond human minds understanding, so to speak. :)

I think modern engines can't find this move because they rely on an "AI" so to speak. They don't just brute-force moves. A specialised computer such as Deep Blue but with today's hardware could probably brute-force this in a matter of minutes if not less

#26, You are wrong. The sequence is 12 moves long, ie. 24 ply, and there are ~35 moves per ply so the engine will have to check 1.42 * 10^37 moves. It can take weeks, not minutes.

Also, the "AI" in the engines is just brute force but with pruning. If it can be found with minimax, alpha-beta will also find it in less time. So Modern engines can find it, but they will need time and memory.

Ah okay, but what if we used a super computer?

A supercomputer might find it easily, i think in 1-2 hrs.

Okay, it seems I have greatly overestimated today's computers. Looks like I won't be bowing down to AI overlords anytime soon :D