By Larry Hodges
If you know your opponent's rating before a match, you have several advantages:
On the other hand:
I would say that far more players, knowing an opponent's rating, have lost matches because of the latter reasons than players who won for the former reasons. In fact, it's not even close. For most players, it's best to approach each match with your own game plan, and worry about the opponent's playing style, not his level. If you execute properly, you'll beat most of the "weaker" players, and probably lose to most of the "stronger" players. But this is better than pulling off an occasional win by knowing the opponent's rating, and losing five for the same reason.
In most tournaments, an opponent's rating is usually listed on the draw sheet and match slip, and so you usually will know his rating; you'd have to make an extra effort to avoid seeing it. And, of course, you might simply know the player and his rough rating from the past. So what do you do?
Simply put it out of your mind. To reiterate, the opponent's playing style is what is important, not his level.
There are some players who do like to know the opponent's rating in advance, for the very reasons given above. As long as you are very flexible in your thinking and tactics in the middle of a match situation - and most players are not - this is not something you want to do. It's usually better to figure out the opponent's level of play in the match itself, not hope his level matches the number next to his name.
Also, an opponent's overall level isn't nearly as important as what the opponent's level is for each technique. If his rating or level is 2000, but he loops like a 2200 player, and blocks like an 1800 player, then your goal isn't to beat a 2000-level player; it's to avoid the 2200 looper, while going after the 1800 blocker.