1♦: 0-7 HCP or 13+ HCP unusual negative
1♥: 8-14 HCP, Balanced or any (4441), (5440), (5431) without 5cM
1♠: Relay
1NT: 12-14 HCP, balanced. Use standard NT methods.
2♣: 8-11 HCP, balanced. Use standard NT methods one step up.
2♦,♥,♠: 3-suited with singleton in higher-ranking suit, 8-14HCP. Opener relays by bidding singleton suit or 2NT after 2♠
2NT and higher: 3-suited with singleton in diamonds, showing additional features.
2♣: 8-11 HCP, balanced. Use standard NT methods one step up.
2♦,♥,♠: 3-suited with singleton in higher-ranking suit, 8-14HCP. Opener relays by bidding singleton suit or 2NT after 2♠
2NT and higher: 3-suited with singleton in diamonds, showing additional features.
1♠: 8+ HCP, 5+ Hearts
1NT/2♣/2♦: Same responses as after 2/1GF (1NT: Kaplan inversion, spades)
2H and higher: Sets Hearts as trumps, modified J2NT/slam tries/splinters/etc to taste.
2H and higher: Sets Hearts as trumps, modified J2NT/slam tries/splinters/etc to taste.
1NT: 8+ HCP, 5+ Spades
2♣/2♦/2♥: Same responses as after 2/1GF
2S and higher: Sets Spades as trumps, modified J2NT/slam tries/splinters/etc to taste.
2S and higher: Sets Spades as trumps, modified J2NT/slam tries/splinters/etc to taste.
2♣: 6+ clubs or 5+/5+ in clubs and diamonds
2♦: 6+ diamonds
2♥,♠; 3♣,♦: Weak 4-7, long suit.
2NT: 15+ HCP, Balanced
The main idea is that after a positive hearts or spades response to a 1♣ opener, a (Semi)forcing NT is no longer neccesary since a positive response is already gameforcing, so why not just remove it and open hearts and spades hands one step up, freeing a 1♥ response to 1♣ as a catchall positive with enough space to unwind, thus simplifying other sequences?
Using 1♠ for ♥ and 1NT for ♠ also allows for right-siding of ♥ and ♠ contracts respectively while the 1♥ catchall positive response limits the hand nicely while offering ample opportunities for penalty doubles if opps interfere. 2♣ and 2♦ also now promise 6+ (or 5+/5+) in the suit which is a marked improvement over standard.
Overall this is similiar to simplified meckwell (1♥= 8-11 HCP, any while 1♠ and above = 12+ HCP) just that we limit by shape rather than HCP.
Any thoughts?