Bridge players hate guessing.
Allowing non-disclosure will basically turn the game into a pointless guessing game, with luck (and to some extent, the bidding system) becoming the predominant factor, rather than skill. This will surely drive away the good players, and all that will be left will be self proclaimed bidding theorists...
Just because you cannot ...
Here is a summary of the relevant rules that @Pieter Geerkens linked to. I am leaving out some of the more sophisticated points, for example, the fact that an artificial/conventional pass call is treated as a bid for the purposes of these rules. The guiding principle is not to punish the out-of-turn bidder, but to make it impossible for the offending team to ...
From Law 70.B:
B. Concession Defined
Any statement to the effect that a contestant will
lose a specific number of tricks is a concession
of those tricks; a claim of some number of tricks
is a concession of the remainder, if any. A player
concedes all the remaining tricks when he abandons
Declarer's statement states that regardless of the play, ...
Playing 2-over-1 with a few conventions (including the serious 3nt), my auction would be something like
2c (this is a bit conservative but I think the right call)
2h (artificial game force)
2s (showing three cards in spades)
3s (setting trumps, showing a hand that is not bad for slam. A hand with poor controls would bid 4s, ending the auction)
3 nt (...
Imagine the opportunities for abuse. Without a disclosure rule, partners can make up any system they want and thereby communicate in illegal ways. There's really no difference to the other players between "qble and Monica's private bidding system that we won't disclose" and conducting the conversation in Swahili; either way it's obfuscating information ...
I have played extensively in clubs in the US and Switzerland, and occasionally in other countries. Bidding boxes are now in almost universal use. Alert rules vary by country, and are substantially different from what you are used to in the ACBL. Fortunately most are simpler than the ACBL's. The club directors I met in Switzerland spoke excellent English -- I ...
This is a lesson in a technique called "unblocking." And yes, the hand can be made in a "roundabout" way.
The first thing you should notice is that North has five tricks in hearts, from K down to 9. The thing that prevents you from taking those tricks is the "blocking" A in South's hand. So on the lead of the king of spades, declarer takes the ace of spades ...
Until a few years ago most Victory Scales awarded negative VPs to a blitzed team. (This link makes reference to such.)
However, by not being at the table on time, ready to play, your teammates are introducing a very disruptive effect on the entire tourney. Your opponents have paid to have an opponent and you have declined to show, for no good reason, and ...
There was formerly a product called Doop (which as far as I can tell is no longer printed) that used a similar idea. They would provide hand records from old regional tournaments along with the scores produced for those hands. It would operate like so:
Each player is given a deck of cards and the list of hands for their seat (so e.g. North gets a list of ...
As I understand things these methods originated in Italy. Many Italian experts play that the double shows 4 or 5 spades and hands with 6+ spades start with 2H. I've tried this in a few partnerships but don't yet have enough experience with it to say how well it works. The partnership does need to agree on followups over 2H since it has a wide range - most ...
Let's talk capabilities first. In general, Grand Slam should not be bid unless one can identify all 13 tricks expected to be made.
If North is making the final 6/7 decision in Spades after a Blackwood auction then only 12 tricks can be counted unless the Diamond J is somehow located: 5 Spades; 3 high Diamonds; fifth diamond after one ruff; and A,A,K in ...
There are plenty of systems that open on 4-cards, I myself play one, and that is not very uncommon here. 4-card systems are commonly used to teach Bridge. Most people prefer 5-card major though, and 4-card major feels outdated these days.
A couple of the more well-known 4-card systems are
Standard American, originnal
The Short Answer: The Director finds which card is missing and restores the player's hand. This card is considered to have belonged continuously to the owner's hand, and as a result may have caused an accidental revoke, which is penalized as if it was any normal revoke.
The long answer:
The first step of a Director in this circumstance is to review each of ...
From the Laws of Duplicate Bridge, Law 46.B.5,
If declarer indicates a play without designating either a suit or a
rank (as by saying “play anything” or words of like meaning), either
defender may designate the play from dummy.
According to the Laws of Duplicate Bridge, 2008:
A. A double or redouble not permitted by Law 19. Law 36 applies.
A. Offender's LHO Calls before Rectification
If offender's LHO calls before rectification of an inadmissible double or redouble the inadmissible call and all subsequent calls are cancelled. The ...
Playing with random partners on BBO is pretty frustrating. You will find a lot of "advanced" players playing "SAYC" who:
make minimal offshape takeout doubles
make minimal (off or on)-shape takeout doubles, then freebid
interpret your jumps in competitive auctions as strong
"weak 2 bid" = "I have a six card suit and a bad hand"
"penalty double" = "I am sad ...
Simple answer- No system- its an open community. If high level players like JEC don't need to specify a system why would anyone else.
Partial answer- Most English speaking bridge players are American so can assume they play some sort of Standard American- they assume you are psychic so you know what they play.
I would expand on Aryabhata's answer by noting a fundamental fallacy in the question: the assumption that correct play by a given system always results in the same action on a given hand.
There are many reasons - psychological, strategic, and game-theoretic - why in many situations the correct play is not constant. One of the most common answers given by ...
It is a "sporting" rule as much as anything else.
The opponents need to be given an opportunity to learn your bidding system. Some will take it, and some won't. But you can't have a situation where the opponents had "no chance" at understanding.
Rainbow movements have individuals remaining a single direction, but only work for a number of tables that is a prime number. If you had 'Pros' sitting North and East, and 'Ams' sitting South and West, then you can also switch partners once each round. My copy of Duplicate Bridge Direction by Alex Groner (1977) describes these in Chapter 7 and lists ...
It is doable:
Trick 1: South trashes Ace of Hearts, North takes with the Ace of Spades.
Tricks 2-6: North leads (and takes) with 9-K of Hearts, South trashes 10-A of Diamonds.
Tricks 7-12: North leads (and takes) with 4-9 of Diamonds, South trashes 3-8 of Clubs.
Trick 13: North leads Club 2 to South's Ace.
You cannot fix the meaning of a single bid in isolation from others.
Based on your 1C including 12-13 balanced hands, I'm assuming that your 1NT opening is 14-16 HCP and that 1D promises an unbalanced hand with 4+ diamonds. If that's not the case, you have imported a gadget that doesn't fit in your system.
The reason for the 1S "transfer to no trump" is to ...
An adjusted score is awarded on a board (in MatchPoints) as follows:
The pairs playing the board are divided into two groups for each direction - a normal score group and an adjusted score group.
The pairs in the normal score group are scored normally against each other, and a tie (ie half matchpoint) for each pair their direction in the adjusted score ...
Looking at just the East West hands without looking at the North South hands, 6D is a fairly poor contract. It has only about a 20% chance of making unless you have peeked at the North South hands.
There are a number of choices that East/West can make during the bidding, but all of them should end up at 3N.
Possible auctions (depending on various subtle ...
I propose the following sequence playing a standard approach, with EW passing throughout:
1S 4 Spades, denying a hand suitable to rebid 1NT
2H 4th Suit Forcing to game, suggesting dislike for NT
3C 5-card Club suit, dislikes NT also, often denies Heart control
4C agreeing clubs, still forcing, extras
4D 1st or 2nd round control in ...
Playing a system such as Standard American this shows a balanced or semi-balanced hand with 18-19 HCP. It would usually deny holding 4 Hearts unless with a 4333 distribution, though partnerships playing some form of Check-Back Stayman may relax this. One might look for an alternative sequence with a holding worse than Qxx in an unbid (Clubs and Spades here) ...
The short answer: because it's just a good idea.
Expanding a bit: One of the primary goals of bidding is to find the best game available. In no trump, game is 9 tricks. In a major suit, it takes 10. In a minor suit, it takes 11 tricks. When you find a good trump fit (8 cards or more in the trump suit), you can usually take about one additional trick with ...
From the description you provide, under The Laws of Duplicate Bridge (2017): the first revoke is established while the second is not and must thus be corrected. (Law 63 details the establishment of a revoke.)
Law 62 - Correction of a Revoke
A. Revoke Must Be Corrected
A player must correct his revoke if attention
is drawn to the irregularity before it
"Join us for Bridge with Shaw Taylor": http://www.youtube.com/watch?v=9GQGfdlNYyM
3 hours in length. Starts from very beginning, assumes no prior Bridge knowledge, and finishes with "Blackwood" small slam game.
"Learn How to Play "Contract Bridge" the Card Game": http://www.youtube.com/watch?v=9yzS_26fICk
Series of videos, starts from very beginning.