How could the supreme leader of Iran be celebrating a teenager who refused to compete against an Israeli chess player as if chess is not Harran to play. is he not endorsing the playing of chess among Shia Muslims?

The Grand Ayatollah Khamenei: If a person can determine that chess at the current time is not counted as gambling, there is no problem in making, buying, selling and playing it without betting. Also considering the above condition there is no problem with teaching it.