DavidKok, on 2026-February-07, 02:50, said:
1♠, showing partner the 4(+)♠5(+)♣ (or 4=1=4=4, but we'll revert to diamonds with that hand anyway if partner supports clubs). This is enabled/supported by the Walsh style where a 1NT rebid would show 12-14 balanced, neither showing nor denying a 4cM - partner's 1♦ response denies a 4cM when weak (or, equivalently, promises enough strength to bid on regardless when holding a 4cM), so this won't miss a fit.
Once again I'm happy to be playing 1♣-2♦ as a 4-8 6(+)♦ weak jump shift. That hand opposite might cause problems, but now instead we're off to a great start. Partner has either a game forcing hand (which should be quite smooth sailing, especially as we have extras), or a balanced hand without a 4cM, or an invitational(+) long diamonds hand, or a diamonds-clubs hand. We're in a great position opposite any of these, with potentially 3=3=5=2 being the most challenging.
What to open with 4=1=4=4 is an age old issue where I think that there is a difference between European and NA bidders, obviously with no perfect uniformity in either region. In NA it is generally considered normal to open 1D. And those who play that 1D promises an unbalanced hand, which is an approach growing in popularity, would also tend to open 1D since most would play that 1C is either balanced or has long clubs.
Note that if opener can bid 1C on 4=1=4=4, and the auction proceeds 1C 1H 1S, responder no longer ‘knows’ that opener has 5+ clubs and untangling the hand can get problematic. Obviously the 1C openers, with that a
Shape, believe there are offsetting benefits,
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