4. Precision
Advantages:
- Strong Hands are shown immediately, and bidding starts at a lower level
- Limited openings, which allows for much better competitive decisions for responder, and for Opener to be able to show intermediate 2-suiters accurately
- Can be used along with 2/1
- Allows a lot of room for system changes/additions
- Can use a weak (or very weak) NT, and not damage the rest of the system
- Allows for light openings, and pre-emption (Therefore sometimes tough to defend against)
- As long as you know the system well, you can benefit from it, however it may take practice to reach this point
- (for Relay Precision) Allows extremely well-defined auctions, where opener/responder can show full shape, strength, controls, honour location etc.
Disadvantages:
- Very vulnerable to pre-emption by the opponents (Takes some time to get comfortable dealing with interference)
- Not a universally-known system (Perhaps a advantage as well)
- Depending on the level of complexity, it can be a very memory intensive system
5. Polish Club
Advantages:
- Strong Hands are shown immediately, and bidding starts at a lower level
- Limited openings, which allows for much better competitive decisions for responder, and for Opener to be able to show intermediate 2-suiters accurately
- Can be used along with 2/1
- If used properly, can be very pre-emptive, but yet very constructive
- Can handle interference fairly well (since responder assumes a Weak NT hand-type), while allowing strong hands to be opened 1C.
- Multi 2D and Polish 2 Bids allow for a much greater spectrum of hands you are able to pre-empt on.
Disadvantages:
- Strong hands sometimes are forced to overbid after opening 1C, to show their values.
- Some aspects (if playing Multi etc) are Midchart.
- Not well known in the US
- Memory intensive, and not much room for changes
6. Forcing Pass
Advantages:
- Tough to defend against, especially since most people have very little experience playing against it.
- Allows for light and (extremely) pre-emptive openings
- Strong Hands are shown immediately, albeit in a bit of an odd way.
Disadvantages:
- Extremely vulnerable to pre-emption and psyching.
- Not allowed in almost all events (Certainly no ACBL ones...)
- Memory Intensive
- Very little pre-emptive value to "Pass", and opponents can bid early/often
Will follow with the conclusions in a little while.