Is there a performing enhancing drugs for chess players?

Why don't you open a forum on How to Hack. Many would be interested to learn.

Because he can't  

Microdose on psychedelics. 

I do better on cannabis. Does that help.

I find the two best PED. Take your pick.

I think Alekhine was a fan of alcohol  

In all seriousness though, I probably wouldn't even take anything for my chess if it existed. Playing a game for fun doesn't require something more potentially harmful to myself than the stress that chess can cause

Some chess players want to win the tournament. Engine help are easily detected nowadays. Urine and blood testing isn't applied in low category and non Masters event. The problems with many ambitious players isn't lack of chess skills. But lack of physical endurance and mental endurance. And emotional stability. Thus resorting to PED.