Listen, I can understand that for a serious chess player, the style of chess has evolved enormously during the 20th century. That doesn&#x27;t make it less of a strictly codified game. Anyway, it&#x27;s a matter of tastes..<p>One last observation. I remember that in the early nineties, a single chord from Nirvana - I was hearing them for the first time- was enough to make me say &quot;this is not heavy metal&quot; (I was actually pretty disgusted by that sound at the time :)). How is it that after more than twenty years (during which I haven&#x27;t listened to new metal bands), 3 seconds of Meshuggah are enough for my brain to categorize them with absolute certainty as heavy metal?