Bill Spight wrote:mitsun wrote:We are getting way off topic, but how about this for a test of the relative importance of fuseki skill: even game, professional versus amateur, each plays to the best of his ability, but switch colors after N moves. How large would N have to be for the superior opening to win?
Interesting question.

To forestall any questions about playing against themselves, we might have pro-am teams where one pro plays the first part of the game and the pro on the other side plays the last part of the game.
Now, I also do not think that it is important for beginners to study fuseki, which is one reason why I like to start them on small boards. What I object to is the idea that they have to become really good tactically before they learn to play the whole board. It is good to study whole board play, even as a DDK. Now, since even 5 kyu players can blow the game near the end because of damezumari, I think that the amateurs should be dan players.
Given that, I think that crossover point to make a roughly even game comes at least after move 75. That is well into the middle game, but the opening is not worth both the middle game and the endgame. If the crossover came at move 50 I would think that the pro first side would lose. I also think that the crossover point should come before move 120. If we actually experimented with this, we might initially try a crossover at move 100.

Edit: BTW, this might be an interesting way to have a teaching game. The players play without handicap and switch sides after 2N moves.

The idea of finding the crossover point seems to be quite interesting, but if it is actually at move 100, say, I don't know how much that will tell you about the opening. My impression is that by move 100, most games are in the mid to late middle-game if not the beginning of the endgame. Arguably, much of the crossover point could point to strong middle-game skills instead. It seems like a difficult question to answer too early, though, because a strong endgame could easily swing the score 30-40 points or more against a shodan amateur. Just because this exercise doesn't speak solely to the opening doesn't mean it wouldn't be interesting, however. As the rank difference increases, I think you might get a much higher move number before the losing player can switch sides and successfully win, and I wonder whether it would be consistent as the stronger player got weaker as well.
I think it may also be interesting if you took a set of pro vs amateur games, and stopped them at, say, 30 or 40 or 50 moves.
The game is then given to the same or a different pro to take the amateur's side as if it were a handicap game, and you ask them what they thought the handicap was, what the result would be. That is to say, if they were to take the side that's behind against an amateur, what sort of normal handicap game they think would be equivalent to the challenge ahead of them. If you have different amateurs of the same nominal strength who get different results, then you'd at least be able to say that, for example, 3-dan A has an opening that's 1 stone stronger than 3-dan B, but when they play he loses the advantage later.