ICCF Rules (2023)

ICCF Rules from 1 December 2022

ICCF Rules Valid from
ICCF Rules (2023) 01/12/2023
ICCF Laws of Correspondence Chess 01/01/2020
Beginner’s Guide to the Revised ICCF Rating System  
Silli System Description  


Errata: There is an error in the formulae in Appendix 1 of the 2023 rules (specifically, the formula for D2j).  This will be corrected in the 2024 Rules, in the meantime the correct version of Appendix 1 can be downloaded from here.  This should be used by any player wishing to reproduce the ratings calculations.


last updated Saturday, September 9, 2023

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