Background

The tie-break has been used in the Olympiad, an international chess tournament featuring over 180 countries from around the world. For the Dresden 2008 Olympiad, the scorings system switched from gamepoints to matchpoints. They chose not to use Gamepoints as the primary tie-break, because gamepoints favours teams who had easier matches. In time for the Khanty-Mansiysk Olympiad in 2010, it was changed to remove the “lowest result”.

 

We used to use Gamepoints in the Junior 4NCL as the tiebreak, but trophies are awarded as prizes; there were weekends where there were multiple teams tied for 3rd place, and not enough trophies for everyone to win. The Olympiad tie-break gets around that problem, because in addition to adding another tie-break, the magnitude of the tie-break is such that it is very unlikely that it will not break the tie.

 

Calculating the Tie-Break
Step 1 – Ranking the Teams

 

The first thing to do is list the teams in the tournament in the following order:

1. Matchpoints

2. Gamepoints

3. Initial Seeding

 

Here is an example from the last Junior 4NCL weekend:

 

Seed

Team

Gam.

+

=

-

MP

GP

9

Welsh Dragons Blue

5

4

1

0

9

14

4

Chess in Schools 2

5

3

1

1

7

12

1

Manchester A

5

2

3

0

7

11˝

14

Manchester B

5

3

1

1

7

11

7

Welsh Dragons Red

5

2

2

1

6

11˝

10

Alpha Zero

5

2

1

2

5

11

8

Chess in Schools 3

5

2

1

2

5

10˝

2

KEGS Chelmsford

5

2

1

2

5

10

5

Ojays B

5

1

2

2

4

9

3

Sleepless Knights

5

2

0

3

4

12

Barnet Knights 3

5

1

1

3

3

9

6

Warwickshire Bears B

5

1

1

3

3

11

Barnet Knights 2

5

1

1

3

3

8

13

Manchester C

5

1

0

4

2

 

Step 2 – Calculating the Score

 

We will work out the tie-break score for Welsh Dragons Blue. Their results were the following:

 

Round

Opponent

GP scored

Opp. MP total

Tie-Break Score

1

KEGS Chelmsford

3

5

15

2

Chess in Schools 2

3

7

21

3

Welsh Dragons Red

6

15

4

Chess in Schools 3

5

17˝

5

Manchester A

2

7

14

 

Step 3 – Determining the Lowest Result The “lowest result” is the result against the team that finished lowest in the initial ranking in Step 1.

 

This is KEGS Chelmsford, who are below Chess in Schools 3.

 

Step 4 – Calculating the Tie-Break

 

The Tie-Break scores for the 4 remaining matches are added together.

 

Round

Opponent

GP scored

Opp. MP total

Tie-Break Score

1

KEGS Chelmsford

3

5

15

2

Chess in Schools 2

3

7

21

3

Welsh Dragons Red

6

15

4

Chess in Schools 3

5

17˝

5

Manchester A

2

7

14

Total

 

 

 

67˝

 

This can be repeated for all of the other teams in the competition.

 


  J4NCL Tiebreak Explanation

 


© 4NCL

Four Nations Chess League

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