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campboy, on Mar 31 2010, 03:54 AM, said:

Firstly, Bbradley62 addressed the issue of shooting, in that you are not changing your methods based on your perception of how well you are doing, you are changing your style (which is fine).

Secondly, there is no problem there. N/S say "we play pen doubles of loose pre-empts, t/o of sound". That is a permitted agreement, since you are permitted to have agreements which depend on the meaning (or style) of previous calls by opponents. What do E/W play, given this agreement?

I also have the impression that it's not allowed to change your methods for subjective reasons during an event. I believe I've read this somewhere a few years back (so it may already be changed).

The above example has nothing to do with this case. It's an agreement vs various systems, not against various people. You are allowed to play different methods over a 1NT opening, according to the meaning of that 1NT opening. That's not a subjective reason.

The situation where it does apply is opposite the same system played by different people. It's like 2 pairs playing strong ♣. One pair is Meckwell, the other is LOL². If their 1♣ opening is the same, you should play the same defense. Obviously, if LOL² plays 18+HCP then you can modify your methods because it's a different opening.

That being said, style is another issue. You can suddenly play more aggressively, double faster,... during the event. But you can't just start playing weak NT all of a sudden.