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)
> 
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>

Answer: 
Strategies in chess boil down to memorising a set of patterns and using them in combinations against the set of patterns your opponent has memorised and combined, then hope they make at least one more mistake than you.

Strategic planning in a business is much more complex:

* you don't have perfect and open and freely accessible information of the game state
* the game is not remotely zero-sum
* the rules are dynamic and with significant regional variation
* you are not in sole charge of your resources or choice of plan
* you are not seeking an endgame, but an open-ended improvement process

Each of these alone makes your chess experience not a brilliant starting point for business strategy planning. At best it will help when you begin learning, but there are other skills which would be far more important in a business setting, like the ability to manage time pressure or to self-develop your skillset for a task.

TLDR: don't bother.
> 
> 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.