Paste a link from chess-results.com, pick your player – done.
Open the tournament page on chess-results.com, copy the address, paste it above.
Tap your own name in the start list.
New DWZ (and FIDE Elo for FIDE-rated tournaments) with the calculation for every game.
Marc Motzer at the 1. Walldorfer Schachopen 2026 B-Open
5.5 from 7 games
Officially evaluated by the DSB – our recalculation matches it exactly.
View exampleThe same picture at every tournament: players sit with their phones, typing opponents' DWZ numbers into various sites one by one. I play chess myself and wanted to quickly see how my DWZ develops after tournaments — without any manual typing.
– Marc Motzer, club player and developer of this site
Forecast based on the German Chess Federation's DWZ formula — not an official evaluation.
How accurate is the calculation?
The calculation follows the official DSB rating regulations (WO). Small deviations from the final DSB evaluation are possible, e.g. for results corrected afterwards.
Why are some opponents missing?
Not all players are registered in the DSB database — this mainly affects foreign players and newly registered club members.
What is the K-factor?
The K-factor (development coefficient) determines how strongly a tournament result changes your DWZ. It depends on the DWZ index, your age group in the year the tournament ends, and in part on your DWZ itself (K = K0 · brake factor + success bonus, WO Supplement 1.3).
What is the special rating (WO 3.6)?
If an opponent's tournament performance rating is more than 300 points above their own previous DWZ (with at least 5 rated games), they count towards their opponents' calculations with this performance rating instead of their DWZ (WO 3.6.3). This does not apply to two-player matches.