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I realized I was a but unclear in my description of the bids. 2♦ is natural and GF. If partner then bids 2♠, 2NT, 3♣, or 3♦, 4♥ is a splinter bid in support of spades, good 5 card diamonds and no club control.

The idea of using 3♥ as INV or min GF has actually worked quite well. We got the idea from Levin-Weinstein.

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With a major, bid it. Without one, pass with four clubs, redbl with five. Otherwise bid 2♦. Continue as normal with bids from responder after pass/redbl from opener meaning what they would have meant after a normal 2♦ response (2♦ from responder means they would have passed a 2♦ bid).

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I think that if the mean and the geometic mean differs greatly, be very careful about using statistics to say anything about the strength of the field.

Tobias Bende

With this hand we would probably bid 2NT-3♣; 3♦-3♠ to show five spades. Then after 3NT we would bid some number of hearts.

Tobias Bende

The idea of using 3♥ as INV or min GF has actually worked quite well. We got the idea from Levin-Weinstein.

Tobias Bende

Tobias Bende

Tobias Bende

Tobias Bende

Tobias Bende

Tobias Bende

Tobias Bende

Tobias Bende

Tobias Bende

Tobias Bende

Tobias Bende

Tobias Bende

Tobias Bende

If not playing split range, I would splinter only with a.

Tobias Bende

Tobias Bende

Tobias Bende

Tobias Bende

Tobias Bende