MoinQ:

IMP/Precisionについて、ここに記述してください。

https://en.wikipedia.org/wiki/Precision_Club

1. MECKWELL LITE PRECISON SYSTEM

https://bridgewithdan.com/systems/

Getting from here to there by: Daniel Neill

Simplified Meckwell Precision system (for students)

https://bridgewinners.com/article/view/meckwell-lite/ /MartinWuest

https://gist.github.com/pristinenoise/593118

Control Precision 5 Opening 1 Club https://www.bridgebase.com/forums/topic/77409-control-precision-5/

RM PRECISION http://www.unit524.com/index.php/conventions/38-rm-precision

2. 1C-1H(8-11HCP)

The advantages to playing 1♥ as 8-11 are too many to number. Even though 4th hand could theoretically blast away, they rarely have the hand to do so without significant risk because both players have penalty doubles available.

The primary advantage to this response is that opener immediately knows whether or not slam is in the picture. Also, it is less preemptive than say 1♣-2♦ showing 8+ points and 5+♦ in standard precision.

For example, this auction is a common example:

1♣-1♥ (any 8-11)-1♠-2♦. Now you're at the same point but both players have given distributional information. Also, if 1♣-1♠ is played as 8+ HCP instead of 12+ HCP, you can gain some space-saving steps after 1♣-1♥// 2m/♥. For those of you who think relay bidding is so great, I'm sure you can figure those out.

Yes, Greco-Hampson play 1♣-1NT shows ♥s, but there are some advantages to play transfers.

It can be played that accepting the transfer at the cheapest level is like a NT bid as a space saving step, and showing 2-3 card support. Then 2NT can be say a hand with 4+ card support, but denying shortness. This saves responder some room in describing their hand. Think of opener's bid as possibly a natural relay.

Anyways, as a person who plays this system and has been playing it for 4-5 years, I highly recommend the system. If it's good enough for Greco-Hampson or Lall-Bathurst or Grue-Cheek, then it's good enough for me.