Introduction of club's ratings

There are two types of ratings - rankings in the club:

• λ ratings - rankings, and;
• ℵ ratings - rankings.

λ ratings - rankings

λ ratings - rankings are calculated in all Blitz, Rapid, and Classical tournaments.

1. How to calculate λ ratings

Suppose player A has a λ rating of λa, and player B has a λ rating of λb.

The probability of A's winning is calculated by the formula:

The K-factor of A is:

The K-factor of B is:

The new λ rating of A is:

The new λ rating of B is:

with Per(A), Per(B) is the number of points that A, B respectively achieved in a match.

• If A wins against B, then Per(A) = 1
• If A loses to B, then Per(A) = 0
• If A ties B, then Per(A) = 1/2 = 0,5

Note:

• Per(A) + Per(B) = 1
• The λ ratings is always greater or equal than 1400 ( ≥ 1400 ), so the K-factor is always in the range [20;100]

2. List of ranks in λ rankings

ℵ ratings - rankings

ℵ ratings - rankings are calculated in all Aleph Chess Tournaments, and all Arène Internationale d'Échecs.

1. How to calculate ℵ ratings

Suppose player A has a ℵ rating of ℵa, and player B has a ℵ rating of ℵb.

The β-factor of A is:

The β-factor of B is:

The probability of A's winning is calculated by the formula:

The K-factor of A is:

The K-factor of B is:

The bonus point for A is:

The bonus point for B is:

The new ℵ rating of A is:

The new ℵ rating of B is:

with Per(A), Per(B) is the number of points that A, B respectively achieved in a match.

• If A wins against B, then Per(A) = 1
• If A loses to B, then Per(A) = 0
• If A ties B, then Per(A) = 1/2 = 0,5

Note:

• Per(A) + Per(B) = 1
• The ℵ ratings is always greater or equal than 0 ( ≥ 0 ), so the K-factor is always in the range [17^1,6;7^1,6]

2. List of ranks in ℵ rankings

Club's "Titled" players

When you become so good at chess (according to the club's ratings), you'll be awarded the club's "title".

How to become a "titled" players

Ask at the Q&A for more details.

Can't even do math like that.