When I had the pleasure of playing the Mixed Pair Finals with my favorite parner in St. Louis, quite a few of our opponents were playing a transfer-Walsh variant. While our meta-agreements left us well positioned, I regretted having so few opportunities to play against transfer-Walsh in ACBL sanctioned events. It is always good to be familiar with the available positive and negative inferences.
BBO offers the opportunity to play transfer-Walsh or play against transfer-Walsh at my convenience. I can also play transfer-Walsh in A/X and Bracket-1 KOs when schedules permit. Sadly, schedules aren't always cooperative and some of my favorite partners prefer club games. This got me thinking about whether I could practice a transfer-Walsh variant in a GCC event.
Here is one approach to consider for those trying to "work around" the ACBL's GCC restrictions.
If your opponent's double your 1♣ opener, you are free to play transfers.
If the opponents pass your 1♣ opener, you can play the following:
1♦ = ART F1 4+♠
1♥ = 4+♥
1♠ = ART GF
Note: You could play 1♦ as showing 4+♥ and 1♥ as ART GF if you prefer.
1♦ is allowed as ART and Forcing under Responses and Rebids rule 1. Artificial game forcing bids are allowed under rule 3.
While it might be nice to use 1♠ to show a limited balanced hand and/or various other hands, Welland and Aukens have shown that international events can be won playing 1♠ as an artificial game force after a 1♣ opening (semi-balanced or ♣). Without the takeout double, you cannot play transfers to both majors. So the "piece" of Transfer Walsh that is available in a GCC event is a transfer to 1 major.
After 1♣-1♦(transfer), you can play 1NT as a 17-19 hcp balanced hand if that is your preferred treatment. A jump to 2NT can be used to show a hand with good, long ♣s with support for the major or the treatment of your choice. Of course, you would use more standard treatments over a natural 1M response because partner no longer has the option of "completing the transfer" to show a "zero" notrump hand, show 3 card support, or another treatment you may prefer.
I wish the GCC did not restrict transfers (or assumed fit 2 suited preempts, but I digress...). I apologize to members of the BridgeWinners community that do not play in ACBL events who might be wondering why discuss this convoluted approach. However, I know ACBL members who play mostly in club game and sectionals and are looking to gain experience with transfer-Walsh. I wanted to share a partial approach they can use. The experience gained from playing a "piece" of a system is not as valuable as playing or playing against a full-blown system. However, it will give you a bit of the flavor of the transfers and the contiunations. It may help you select a better defense against transfer-Walsh partnerships (http://bridgewinners.com/article/view/defense-vs-t-walsh/) or may lead you to play a full version of the system. More importantly, it may be a lot of fun to experiment with a piece of a new system playing with friends at your local club.
Plus... it's free!