yadny

lol I had seen that the error in the original post had been fixed, so I naively assumed that the error in my post was the result of an entirely different problem. it didn't occur to me that it was just the same problem as before

here's one: https://tinyurl.com/y8ac45v9 At trick 8, when East leads a trump, the double dummy analysis indicates that South can play any trump and still make 12 tricks; however, in order to make 12 tricks it is necessary to play the Jack (you retain the ability to win the trick in either hand, depending on West's discard) this can be verified by pressing 'play' and making South play the 9 or the 7, then checking the DD analysis on West's play

The system looks excellent overall, but I would suggest one tweak. Once responder's exact point count is known (e.g. after 1♣-1♥), opener will usually be able to place the contract immediately, but they may require further information about their partner's strength. I propose that opener's lowest step should be an artificial enquiry for Middle Card Point (MCP) strength, where T = 4 MCP 9 = 3 MCP 8 = 2 MCP 7 = 1 MCP with responder showing MCP in a similar scheme to the one for HCP described above. It's true that this gives up a natural bid, but in most cases (e.g. 1♣-1♥-1♠) this bid is of limited utility and would rarely be made - the ability to determine partner's MCP count is more useful than showing length in spades, which could always be accomplished with a 2♠ bid anyway. To illustrate the methods further, suppose that opener holds the following hand ♠ AKQJ9 ♥ AKQJ ♦ AKQ9 ♣ - and hears a 1♠ response to their 1♣ opening, which shows 9 or 10 HCP. Opener has an automatic 1NT bid, as a strength enquiry. Once responder shows 10 HCP alongside opener's 29, they know that the missing point is one of the minor suit jacks. 7NT will be a comfortable contract if partner possesses the jack of diamonds, but it would be foolhardy to bid a grand slam prematurely with no certain entry to partner's clubs. For example, if partner holds ♠ - ♥ 32 ♦ 32 ♣ AKQJT5432, even 6NT is a poor contract, requiring a 4-4 spade split or the ♠T to be short, approximately 55% overall. Most systems would flounder when confronted with this bidding problem, but opener's ability to find out about their partner's MCP would come to the rescue: 1♣* - 1♠** 1NT*** - 2♦**** 2♥*** - 5♦***** *Strong **9-10 HCP ***Enquiry ****10 HCP *****26-27 MCP At this point, opener knows that the partnership possesses 32 or 33 combined MCP. If responder holds the 10 of spades or the jack of diamonds, 7NT is cold, and if they hold neither of these cards, their only possible 26-MCP hand is ♠ 8 ♥ T98 ♦ T8 ♣ AKQJT98 Opener can therefore bid 7♣, pass or correct. Responder actually held ♠ T8 ♥ T98 ♦ T87 ♣ AKQJT and naturally corrected to 7NT. The system was necessary to bid the slam with certainty.

this one started off slowly, but then gained steam: 1♣ - 1♦ 1♥ - 3NT 6NT - 7NT (one off) another pleasing one was 1♥ - (X) - XX - (1♥)