Question: Since my past works didn't require strategic planning skills much, I think than mentioning about my chess skills is a good example for it. What do you think?

Here is my draft:

> 
> Skills
> ======
> 
> 
> **Strategic planning:** top 50 players in Chess Tournament for Students in City X (2012)
> 
> 
>

Answer: 
> 
> Since my past works didn't require strategic planning skills much, I
>  think than mentioning about my chess skills is a good example for it.
>  What do you think?
> 
> 
> 

Unless you are planning to apply for a job as a chess tutor, then leave off your chess skills. The same would be true for other games - backgammon, bridge, poker, etc.

Your resume should reflect your abilities relevant to the job for which you are applying. While chess involves strategy, jobs in business requiring "strategic planning skills" are looking for something different.

> 
> Strategic planning is an organizational management activity that is
>  used to set priorities, focus energy and resources, strengthen
>  operations, ensure that employees and other stakeholders are working
>  toward common goals, establish agreement around intended
>  outcomes/results, and assess and adjust the organization's direction
>  in response to a changing environment. It is a disciplined effort that
>  produces fundamental decisions and actions that shape and guide what
>  an organization is, who it serves, what it does, and why it does it,
>  with a focus on the future. Effective strategic planning articulates
>  not only where an organization is going and the actions needed to make
>  progress, but also how it will know if it is successful.
> 
> 
> 

See: <https://balancedscorecard.org/Resources/Strategic-Planning-Basics>

Writing something like "Strategic planning: top 50 players in Chess Tournament" would signal to the company that you don't really understand strategic planning in a business context.

If you feel you must mention chess, include it in a "Hobbies" section.
Even though I do, in your case I wouldn't. And certainly not in the Skills section. 

I've always mentioned my chess skills on my resume, but in the Hobbies section. Feedback was never negative, ranging from one quick slightly intrigued question to a longer discussion with genuine respectful interest. In many people's mind chess is linked to intelligence (it's complete crap obviously, there are dumb people in chess as in any other part of the population), strategic thinking etc. It might also be viewed as a sign of nerdiness (again, cliches die hard) but hey I work in IT so I'm already assumed to have a 50% chance to be an autistic geek :) Seriously it's a good way to tell a bit more about myself in a way that is generally perceived positively, and several times served as an ice-breaker once we were done with the regular hr/technical questions. But it's not intended to prove anything regarding my skillset. 

That being said, I would only mention playing chess, not that tournament. To be honest it's just not that impressive. If they show some interest and start discussing your hobby then you can talk about it.