are the boys better than girls in the chess?!!

 Since girls are human beings and chess is just a game ;)

I've yet to have a man ever beat me at chess, except for the man who taught me

Play more.

(Incidentally, the same advice applies to any male who claims that no woman has ever beaten him at chess.)

Boys are not better at playing chess then girls! We are both the same, it is all down to the practise and tatics. More boys play chess then girls, but that dosen't mean there better then us at it.

So no. Boys are not better.

I think the Polgar Sisters are a good example not as an anecdotal case of any woman making it to 8th in the world (I think that was Judit's highest ranking) that would, all things being equal actually demonstrate the inferiority of women chess players as it would be simply saying the best woman chess player is only 8th. But saying that a father purposefully trained all his children to become chess masters is an experiment in the capacity of anyone (these girls were not selected for natural ability) to become great at chess given the right environment.

So now we understand that encouragement and environment make a crucial difference to the successful career of a chess player, which must overcome many difficult thresholds on the way to becoming a world-class grandmaster.

Taking that into account we then have to ask if there is an imbalance in the environments that most girls and boys are exposed to in relation to chess.

Up until recently many more boys have played chess than girls. Those that excel will no-doubt come from that larger group, couple that with the resulting peer pressure for the dominant boys to continue as opposed to the resulting peer pressure for girls to stop, coupled with the common belief that only men can really be great grandmasters.

Given all this what you have is a terrible environment for girls, and a great environment for boys to excel in chess. Since only the best environments for chess result in Grandmasters (even Magnus Carlson had years of focused training and encouragement before becoming a Grandmaster) you should not expect, all things being equal, to have any women in the top 100 chess players. But given just one determined family you get a woman to #8.

If women actually had less capacity for chess than men, then a girl chosen at random and trained to become a chess master just would have failed completely, but she didn't. Do this with 100 girls, and you'd probably get a woman competing for the top spot. Address the inequality of exposure and encouragement in childhood across the board, and there will be no difference at all between male and female grandmasters.