TalkChess.com

There are now many online tournaments. How is cheating with engine prevented? I think is impossible.

Crystal has the lowest rating. It confirms, that engine is the best problem solver !

Lc0 played -a2 and lost! Was there anything better?

I was curious and tested Crystal in Hard-Talkchess. One minute and 4 cores. In normal mode Crystal solved 94 positions. With 2 best lines it solved 110 :!: . But there is no GUI to do this automatically (?) so I counted solved positions manually. Note that if 2 move had same score I counted it as so...

In TCEC SF hasn't won any game in the last 30 one! But score 37-34 means engines are still within 15 ELO.

Latest Crystal solves about 65/100 in one minute limit and 4 cores. With "solving" I mean first move or win/draw.

No. Simply selection of long mates from Chest database.

How many of these 100 positions Sting solves in reasonable time limit 1/5/10 minutes?

I hope You have looked at Houdini 6 tactical mode source. It solves some tactics still faster than Crystal even being from 2017!

In TCEC 176 cores SF is competitive with 4 x 4352 = 17408 CUDA cores. Neither is consumer product .