[alibodin]

I’ve been trying out a very simple Strong Club structure using TWalsh responses to 1♣ for casual online play, but I’m now looking to move to natural responses — mainly for simplicity and for face to face club sessions where players aren’t familiar with artificial systems. The aim is to keep memory load low and keep the system natural and straightforward.

Opening Structure
• 1♣ = 15+ any (21–23 semi balanced opens 2NT)
• 1♦ = 10–14, 4+♦, unbalanced
• 1M = 10–14, 5+ cards, unbalanced
• 1NT = 12–14 balanced/semi balanced
• 2♣ = 10–14, 6+ clubs or 5+ clubs with a 4 card major, unbalanced
• 2♦ = weak, either major (I like the tactical pass — hence not using the Precision 2♦)
• 2♥/2♠ = weak, 5M with a minor

Note: We pass very rare 10–14 4=4=1=4 hands in 1st/2nd seat, but open 12-14 1♥ in 3rd seat. Keeping 1♦ strictly unbalanced avoids extra alerts and keeps things simple.

Responder to 1♣ (Walsh/MAFIA flavour)
• 1♦ = 0–5, or 6–7 with no major
• 1♥/1♠ = 6+ HCP, 4+ major
• 1NT = 8–9 balanced, no major
• 2m = 8+, natural, 5+ suit, no major
• 2M = weak
• 2NT = 10–12 balanced, no major
• 3NT = 13+ balanced, no major

Handling the wide 1M response
• Minimum unbalanced or 15–17 balanced → bid naturally, keep it low.
• 18+ → jump or new suit to force.

Interference over 1♣
• Pass = weak (0–5) or trap
• X/XX = 6+ values, no 5 card suit
• Suit = natural, 6+ HCP, 5 card suit
• Jump Suit = stronger natural, 10+ HCP, 5+ suit
• 1NT/2NT = balanced with a stop

I’m interested in simple, practical tweaks or any obvious bidding sequence issues people have seen in similar lightweight strong club structures.

[steve2005]

1♣-3N as 13+ is unworkable.
your starting too high but your still not strong enough to safely force to 4NT
so you have no way to investigate when you are often in slam zone

3N is too high even if you were define it as 14-15, so being stuck with only 2 NT bids you either have to make them wider, or non-continuous

9 is a better minimum if you want to set up a game force opposite 15 pts 1C openings

1N=9-13, 2NT = 14+

or
1N=9-11 or 15+ (with 4+ controls) 2NT = 12-14
with 15+ you dont respect signoffs.

[steve2005]

alibodin, on 2026-September-05, 16:13, said:

Responder to 1♣ (Walsh/MAFIA flavour)
• 1♥/1♠ = 6+ HCP, 4+ major

Handling the wide 1M response
• Minimum unbalanced or 15–17 balanced → bid naturally, keep it low.
• 18+ → jump or new suit to force.

by making the 1♥/1♠ not game forcing you are having to jump with 18.19+ to game force using up space.
You will have 1C-1M-3m set up where you are still looking for a fit at the 3-level with 3N looming.
One of the biggest advantage of strong 1C system is you are game forced after all positive response, so you dont have to jump to gf

You definitely need to make 1M 8+ so its GF maybe even 9+ as your open 1C on 15. Your NT and 2m bids need to be 9+ too if your open 1C on 15

[DavidKok]

Apologies in advance - I don't like this approach to strong club much. I think there is a lot of room for improvement. However, these would inevitably also move you away from the simplicity aspect. I wanted to share some thoughts on what I think the weakest points of this system are, so that you can better decide if you want to make changes, and if so, where.

Generally I am very unhappy with the 15+ 1♣. I think it is, in a sense, lazy system design. The 1♣ opening in Precision systems is one of the system weaknesses. By contrast, the limited openings are the system powerhouses. I want to control the frequency with which it the weakness comes up, so that I'm not using a fragile part of my system often. I think a lot of system designers end up at a 15+ 1♣ to pair with an 11-14 or 12-14 1NT opening, that way all other openings can be unbalanced. Personally I am not happy with this at all, and the reason is frequencies. I have run a little sim of the (first seat) opening frequencies in your system, this is what I found:

• 1♣: 14.5%
  
• 1♦: 4.1%
  
• 1♥: 5.8%
  
• 1♠: 6.5%
  
• 1NT: 11.5%
  
• 2♣: 2.9%

To me it looks a lot like your 1♣ is overloaded, your 1NT is doing most of the work, and the rest of the system doesn't matter much. Normally I recommend people do not spend too much time on their 1♣ structure when learning the system, since it's a weakness by design and should not come up often. Instead I normally emphasise learning how to bid with limited hands, using the strengths Precision systems have to offer to their full advantage.
In your system this argument is false. You need to put most of your effort into your strong club and weak NT auctions, and don't get to take much advantage of the limited openings. Ouch.

Despite that, I wouldn't worry much about the constructive system over your strong club. The opponents will regularly (>50%, maybe >67% of the time) overcall. Your 1♣ is bottom-heavy, this is the HCP distribution (of any hand, and therefore a good approximation of your 1♣ opening, truncated at 15 hcp):

• 15: 31%
  
• 16: 23%
  
• 17: 17%
  
• 18: 11%
  
• 19: 7%
  
• 20: 4%
  
• 21+: 6%

(due to rounding this only adds up to 99%)
If you have a minimum 1♣ opening, not only does this mean the opponents on average have a bit of extra strength which encourages them to bid (e.g. it's slightly more common for them to have a 'good enough' suit), also these are the scenarios where partner gets punished for stretching to get a suit in. With this bottom-heavy list that's going to be the most frequent case, though thankfully still under 50% of the time. What you really need in this system is good ways to find your games with 15-17 opposite 8-9 on competitive auctions, without committing to misfit 15-opposite-8 games (or maybe this might be the lesser evil?). This is difficult - opener will be unbalanced more often than not, and you'll have less bidding space and information than standard bidders. Personally I would flip your jump overcalls and your regular overcalls in competition after 1♣, and change the ranges a little, to look like this:

After interference of the 1♣ opening:

• Pass: approximately 0-5 or trap pass.
  
• Double: takeout (short in their bid suit), no good bid, 6+.
  
• Non-jump bid: 5(+) cards, 9(+) hcp, forcing to game.
  
• Jump bid: 6(+) cards, 6-8 hcp, invitational, not forcing.

I think you will end up in quite a bunch of bad games, and miss good ones, on these starts. But I also think you can't do much better while keeping it simple. If you do end up playing something like this, be aware ahead of time that the most likely way you miss out on good games is by failing to double, and finding bad ones will regularly start with a double. Double is not a cure-all, so avoid discussions along the lines of 'maybe this hand should double after all so that we can still find...' - overloading double just shifts the problem around.

On the constructive side you can do something similar. I would recommend the simple approach by C.C. Wei - dated, but natural and simple. So, after 1♣-(P)-?, play:

• 1♦: 0-8 any
  
• 1♥: 5(+)♥, 9(+)hcp, GF
  
• 1♠: 5(+)♠, 9(+)hcp, GF
  
• 1NT: Balanced or any 4441, 9(+)hcp, GF
  
• 2♣: 5(+)♣, 9(+)hcp, GF
  
• 2♦: 5(+)♦, 9(+)hcp, GF

Personally I am uncomfortable setting 9 hcp as the cutoff for forcing to game opposite this 15+ opening. I have more experience with a [16+ unbalanced or 17+ balanced] strong 1♣. Now opener is more frequently 17+ (so not absolute minimum), or may have a long suit to compensate with 16. Opposite that opening I force to game with 8 and invite with 5-7. I'm afraid the 15+ range instead has to make another systemic sacrifice here - waiting for 10+ to give a positive response is going to leave you dry too often, so you'll just have to force to misfit 24 hcp games somewhat regularly.

As a last note I really do not like the 2♣ opening. The clubs Raptor hands really don't fit in with the 6(+) clubs hands, especially at the 2♣-level. However, the opening is rare, so I expect it to be an issue when it comes up, but not impact the total system that much.

[awm]

You have a fellow traveler in Tom Reynolds at least for the opening structure.

If you're going for simplicity, you probably want to play game forcing responses to 1♣ (other than 1♦); it's possible to devise a system with immediate semi-positives but it's a lot more complex since you need agreements about how to force in various auctions.

To explain what I mean here, say the opponents pass and the auction starts:

1♣ - 1♠

If opener bids 2♣, is this forcing? If it's not, then opener has to jump with 18+ or something, which seems really bad especially if he has only five clubs and not six. If 2♣ is forcing, then we have:

1♣ - 1♠
2♣ - 3♣

Is 3♣ forcing? If it's not, then responder has to make up a second suit or jump past 3NT to force (ugly). If it is forcing, it's very unclear how you stop with 15 opposite 6 (or similar).

It's possible to make this work, but you probably need some artificial rebids by someone at some point... you also need agreements about whether pass is forcing when fourth seat comes in, what opener does with a minimum but a really long suit after 1♣-Pass-1♠-2♥ and similar, etc. Overall this will end up being really complicated -- if you're going for simple you want GF responses to 1♣ (other than the 1♦ negative).

[WasWinM]

awm, on 2026-September-06, 07:26, said:

You have a fellow traveler in Tom Reynolds at least for the opening structure.

If you're going for simplicity, you probably want to play game forcing responses to 1♣ (other than 1♦); it's possible to devise a system with immediate semi-positives but it's a lot more complex since you need agreements about how to force in various auctions.

The original U.S. strong club system that made headway and was played is Schenken Club by Howard Schenken. It was a pretty simple system if you can find still find the book.
There was one well before that but never made it big with the masses.

[steve2005]

DavidKok, on 2026-September-06, 00:03, said:

• 1NT: 11.5%

To me it looks a lot like your 1♣ is overloaded, your 1NT is doing most of the work, and the rest of the system doesn't matter much. Normally I recommend people do not spend too much time on their 1♣ structure when learning the system, since it's a weakness by design and should not come up often. Instead I normally emphasise learning how to bid with limited hands, using the strengths Precision systems have to offer to their full advantage.
In your system this argument is false. You need to put most of your effort into your strong club and weak NT auctions, and don't get to take much advantage of the limited openings. Ouch.

I don't mind that 1NT is doing much of the work. See Tom Reynolds above.
Most people are much better at bidding over 1NT than the rest of their system, so I see opening 1NT often as a plus

Your NT ladder is going to be wide range for 1NT rebid I think though
Open .....Rebid.....Pts
1NT ................ 12-14
1C .........1NT..... 15-18 (wide range)
1C ........ 2NT.......19-20
2NT ................... 21-23

If you made 1NT 12-15 (wide range but at least is preemptive)
your 1NT rebid after 1C can be 16-18 at the cost of making your 1NT opening wide range
but now you are much more comfortable having 9+ pts for a positive response as you will have at least 16 if balanced. So if unbalanced 15 opposite 9 you will be ok as long as you have a fit .

For 2NT I dont like 21-23. You are going to have interference over your 1C and it will be hard to differentiate between (15)16-18 and 19-20
If you use 19-20 you are differentiating between (15)16-18 and 21-23 is a much easier proposition

Your methods over interference of 1C are poor. Agree something like DavidKok proposed is fine. There are other possibilities but your jumping to show a GF is not good and wont work over higher interference.

[steve2005]

alibodin, on 2026-September-05, 16:13, said:

Opening Structure
• 2♦ = weak, either major (I like the tactical pass — hence not using the Precision 2♦)
• 2♥/2♠ = weak, 5M with a minor

Note: We pass very rare 10–14 4=4=1=4 hands in 1st/2nd seat, but open 12-14 1♥ in 3rd seat. Keeping 1♦ strictly unbalanced avoids extra alerts and keeps things simple.

Would gladly pass 4441 hands if ACBL allowed Multi 2♦
but alas it not allowed except for a few tournaments which I never play in.
So it's Precision 2♦ for me. But at least that means my 2C promises 6 clubs.

[alibodin]

Thank you for all the detailed comments, much appreciated. Playing this system socially on BBO tomorrow for the first time though we played it twice before with TWalsh responses to 1♣.

Haven’t had time to review the responses or the Tom Reynolds article properly, and I remember Wei Precision from 40 odd years ago when I played relay precision.

Current thoughts:

• 1♣ = 16+ to reduce frequency. Limit other hands to 11-15
• 1NT = 13–15, and keep 1♦ unbalanced pass flat 12 and upgrade shapely 12 to 1NT
• Keep 2♣ for now; moving 5♣4M to 1♦ might cause issues at the club as opening could now be singleton.
• Interference + jump invites look good.
• Considering 1♦ as the only negative, My guess the negative is the most common response and we will be off the hook when opps intervene half the time as we will be weak.

Need time to think these things through, I am a slow thinker 😊

[DavidKok]

These are good adjustments, improving the system while sticking to the same spirit. Still, two short remarks:

The increase of a single point on the opening requirements represents a serious drop in the level of aggression. Passing balanced 12s is unpopular, for good reason. Most strong clubbers I know prefer to play a more aggressive system, accepting the weaknesses, over playing a conservative system.

If you open 1♣ your average point count is going to be like 16-17, leaving partner with 7-8 on average (I am guessing here, you can work out a better estimate from my numbers posted earlier). This means you're not off the hook with a negative or after interference - this is exactly the problem invitational hand, where game is possible but not guaranteed.