I have the 1987 World Championship Book:
That was the year two pairs on the British Team played strong pass with 1
♣ or 1
♦ being a fert, 0-7 hcp. There is not much detail given:
Flint-Sheehan: Opening pass = standard 1
♣ opening, 1
♣ = 0-12 hcp, 17-19 bal or strong 2-suit, and weak NT
Armstrong-Forrester: Opening pass = any 11-15, 1
♣ = strong, 1
♦ = 0-6 unbalanced or 0-10 balanced, 1
♥/1
♠ = 7-10 and 5+ cards or 0-2 cards.
The analysis said 2/3 of the time they broke even or had no substantial effect on the result. 16 boards had plus swings (8 major, 8 minor) and 18 boards had minus swings (7 major, 11 minor).
Peter Oakley in his pamphlet,
The Diamond Major: "Jeremy Flint's Boomerang Club system uses 2-level major-suit opening bids to cover all 2-non touching-suited hands, both weak and strong. The idea is quite ingenious:
2♥ = strong:♥ + ♣, or weak: ♠ + ♦
2♠ = strong: ♠ + ♦, or weak: ♥ + ♣
The strong combination will have only three or four users."
See chapter eight for examples and how to respond:
http://www.bridgeclu...ude/Diamond.htm
Boomerang Twos may be judged a highly unusual method (HUM) and not be legally accepted for a Pairs contest,
Ultra
♣ Relay: see Daniel's web page:
https://bridgewithda...19/07/Ultra.pdf
C3: Copious Canape Club is still my favorite system. (Ultra upgraded, PM for notes)
Santa Fe Precision
♣ published 8/19. TOP3 published 11/20. Magic experiment (Science Modernized) with Lenzo. 2020: Jan Eric Larsson's Cottontail
♣. 2020. BFUN (
Bridge
For the
UNbalanced) 2021: Weiss Simplified
♣ (
Canape & Relay). 2022: Canary
♣ Modernized, 2023-4: KOK Canape.