[mycroft]

antonylee, on 2013-May-19, 13:04, said:

I think a reasonable interpretation of GCC is
- any meaning for 1D is allowed, [Mycroft: as long as it's forcing if it could be not natural]
- a 1M response must be either natural (4+) or GF (not a combination of both),
- I think 1C-1D-1H(relay) is allowed, just as you are allowed to play a Kokish relay over a strong club.

The issue with relay systems times out at opener's rebid ("A sequence of relay bids is defined as a system if...it is started prior to opener's rebid") - for practical purposes it's just "responder's first call can't be a relay; both players must make at least one descriptive call". However, Kokish Relay isn't really a "relay", it's a puppet - responder "must relay" to allow opener to describe his hand. What would be more matching is Symmetric Relay after 1♣-1♦ (any GF), where opener's 1♥ simply says "I don't want to show my hand, you show yours".

[PrecisionL]

Transfer Walsh is now ACBL Legal.