what exactly are the effects of masturbation on the body?

You cant really damage your body through masturbation, but it does have temporary effects on the body. After climaxing you feel lethargic, tired, out of energy and generally not interested in things you are normally interested in. In addition to this if you for instance, attempt to play chess after a session of masturbation, youd find it harder to concentrate as large amounts of hormones and additional chemicals are coursing through your body at the time.

These chemicals can have an effect on you both psychologically and socially. Think of these chemicals and hormones as a drug, when you climax, your left in a state similar to a 'high'. It is very possible to become addicted to both the high, and the pleasure released, which can lead to chronic masturbation, the constant 'need' to masturbate no matter where you are or what your doing.

Socially, it can affect you in many ways. You become tired and less energetic, meaning you have less energy to expend on outdoor activities, if you masturbate before going out and doing something, hanging out with friends, playing chess, general interaction, youll feel yourself less interested in such activities, due to the chemicals and high your body has going at the time. It will make it harder to concentrate, interfere with hand-eye coordination (not to the point where your stumbling around ofcourse but youd be hard pressed to have 100% accuracy shooting a basketball etc.)

In short, its best to moderate your sessions, and generally not right before your about to go out and do something. ;-) hope this helps some.

hate to disagree so adamantly with the person above, but....

No! wanking will not affect how you play chess, or make you permanently lethargic or tired. the only thing you're suffering from is puberty so wank away.

I can't tell how old you are from your post, but one thing that immediately came to mind was this. No, losing chess skills isn't an effect of masturbation. Difficulty concentrating and just changing interests, in general, can most definitely be an effect of PUBERTY, however! If you are currently going through puberty, you will experience those effects (which vary from person to person) regardless of whether you quit masturbating or not. 

Masturbation is also relaxing, can relieve feelings of mild depression, and of course eventually leads to better sex with a partner since you'll know your own body. Don't worry about it. :)

Instead of doing that get outside more or lift weights and set goals it will make u much happier than that

If masturbation harmed the body, the human race would have died off long ago!

how should you play chess if you are not giving enough time for learning everyday ....instead you are wanking everyday . .