W N E S
P P 1♥ 1NT
P 3♣ P 3NT
P P P
3♣ was natural and invitational
Table result was 3NT+2, N/S +460
The E/W agreement for 1♥ opening bid is natural, "rule of 19".
The TD asked West why he did not double 1NT. He said that whilst he might have enough to defeat 1NT he was worried that doubling would persuade the opponents to run to a safer spot.
The TD asked West why he did not double 3NT. He said that he was confused because the auction did not make sense.
The TD asked East and West if their partnership had ever psyched a 1-level opener before. No was the reply.
The TD classified the psyche as "amber".
N/S appeal, on the basis that they believe it should be classified as "red". N/S claim that East has made psyches of this type before (though perhaps not with this partner) but the TD does not know of any written hand reports of any such psyches.
How would you rule if on the AC?