Mitchell

Mitchell flytte system ble laget på 1800-tallet av John T. Mitchell. Flyttingen ser kanskje veldig enkel ut, og det er en god grunn til at man må være påpasselig for feil. En feil i Mitchell flyttingen kan ødelegge turneringen! 
Fordelen med Mitchell er at den er så enkel å legge opp og man trenger ikke særlig forberedelser. En annen fordel er at man kan kjøre en turnering med mange bord siden man spiller bare halvpartene av rundene i forhold til Howell/Serie. Men da får du ikke møte mer enn halvparten av parene og du får 2 resultatlister. For å få bare en resultatet må du rotere noen spill som beskrevet i  Bofors Mitchell.

ORGANISING MITCHELL
One sitting pair and one moving pair are placed by every table. You place one boardset on every table. With 5 tables you use 5 boardset, with 6 tables you need 6 boardset etc. The principal rule is that the moving pairs move in one direction after every round while the boardsets move in the oposite direction. When you have played the same numbers of rounds as there are tables, all sitting pairs has met all the moving pairs and all pairs has played all boards.
The principal rules are:

- The sitting pairs sits NS and has the same pairnumber as the number of the table.
- The moving pairs sits EW and has the samme pairnumber as the number of the table +  the number of tables in the tournament.
- The boardset has the same number as the number of the table it started on.
- Every new round the moving pairs move to the nearest higher table (from the highest table to table #1).
- The boards are played numbervice (ex: 1-2-3 etc), so the boardset move to the nearest lower table. (from table #1 to the highest table).

With this easy moving plan you don't need to make guidecards. Just remember to inform the pairs before you start. It is important that the boardsets and pairs are moved in the right direction or you will get a lot of problem later in the tournament. To make the moving easier you should form the tables like in a "U" form so the lowest table is placed near the highest table (look at the Mitchell example).

There are two ways of organizing a Mithell tournament. With an even number of tables and with odd numbers. It is important to know that you can't organize an even numbers Mitchell as an odd numbers Mitchell and vis a versa. These two ways of organizing the moving are made so that all pairs play all the boardssets and meet all pairs who sits in the other diredtion.

Here are the two ways of organizing Mitchell with examples.
 
Odd Numbers 

This is the easiest Mitchell tournament to organize. The pair- and boardset movements are as described above. 

  : Bordnummer.  
: Parnummer.  
  : Par flytting. 
   : Spillset nummer.  
  : Spill flytting. 
 

 Even Numbers 

To get an even Numbers Mitchell tournament to work, you need to make a change of the boardsets movement. If not, you will discover that after halfplayed tournament the pairs will get boards they have played before. To solve this problem you have to insert a "blind" table between the two middle tables. (between table 3 and 4 in the example). This "blind" table is only used as a moving station for the boardsets. When you place the boardsets before you start, boardset #1 is placed at table #1, #2 at table #2 and so on until you reach the "blind" table. You place a boardset at the "blind" table and continue. Before you reach the highest tablenumber you will find that you have run out of boards. But thats right because the highest table has to share boards with table 1. When it is time to move, the pairs ignore the "blind table. But the boardsets move throu the "blind" table so that in the example belowe, the boardset on table 4 moves to the "blind" table, and the boardset on the "blind" table moves to table 3. The boardset on table 1 moves to the next highest table. (The symbols in the example is the same as Odd #)
Example of 5 tables (9-10 pairs)
Example of 6 tables (11-12 pairs)

BOFORS MITCHELL
Mitchell gir deg 2 separate resultatlister. En for N-S parene og en for Ø-V. Men det er en måte å få bare en resultatliste. Med Bofors Michell systemet vrir du spillene i noen runder slik at NS spiller spillene som ØV og ØV spiller spillene som NS. Nedenfor er tabellen der det står i hvilke runder spillene skal vris. NB! NS ved bord 1 skal ikke vri spillene. 
(Husk at hvis NS spiller spillene som ØV må de også skrive sitt parnummer i ØV og scoren som ØV)
 
Sitteparene spiller kortene som ØV i rundene som står listet nedenfor. Unntaket er NS ved bord 1 som alltid skall spille kortene NS. 
#T
 Spillseriene vris i følgende runder:
3
4
5
6
7
8
 3 
4 
5 
5,6 
6,7 
4,7,8
 
#T
 Spillseriene vris i følgende runder:
9
10
11
12
13
14
 6,8,9 
4,6,9,10 
7,8,10,11 
5,7,11,12 
7,9,12,13 
7,9,10,11,14
 
#T
 Spillseriene vris i følgende runder:
15
16
17
18
19
20		 7,10,12,14,15 
6,7,8,12,13,16 
9,11,13,14,16,17 
6,7,9,13,15,17,18 
8,11,13,14,15,18,19 
7,8,10,13,16,18,20