A very common chess template on many Wikipedias recommends using '|=' , and most instances of chess boards use this syntax
https://en.wikipedia.org/wiki/Template:Chess_diagram#Standard_diagram
https://de.wikipedia.org/wiki/Vorlage:Schachbrett#Standarddiagramm
On German Wikipedia, editing the template strips the '=' signs. This article is on the parsoid topfails
https://de.wikipedia.org/wiki/Edward_Lasker?veaction=edit
http://parsoid.wmflabs.org:8001/topfails/1
There are 900 uses of these chess templates on German Wikipedia.
https://de.wikipedia.org/w/index.php?title=Spezial:Linkliste/Vorlage:Schachbrett&limit=750
https://de.wikipedia.org/w/index.php?title=Spezial:Linkliste/Vorlage:Schachbrett-klein&limit=115
A few more of
https://de.wikipedia.org/wiki/Vorlage:Schachbrett-10x10
https://de.wikipedia.org/wiki/Vorlage:Schachbrett-8x10
https://de.wikipedia.org/wiki/Vorlage:Schachbrett-Chaturanga
The syntax is used on many other WPs, incl. eswp, frwp, plwp and ruwp
https://es.wikipedia.org/wiki/Plantilla:Diagrama_de_ajedrez#Diagrama_est.C3.A1ndar
https://fr.wikipedia.org/wiki/Mod%C3%A8le:Diagramme_d%27%C3%A9checs
https://fr.wikipedia.org/wiki/Alexandre_Alekhine
https://pl.wikipedia.org/wiki/Szablon:SzachyDiagram
https://ru.wikipedia.org/wiki/%D0%A8%D0%B0%D0%B1%D0%BB%D0%BE%D0%BD:%D0%A8%D0%B0%D1%85%D0%BC%D0%B0%D1%82%D0%BD%D0%B0%D1%8F_%D0%B4%D0%B8%D0%B0%D0%B3%D1%80%D0%B0%D0%BC%D0%BC%D0%B0
On English, the VE UI can go into massive layout problems, but the UI issues may all be due to the Parsoid issue.
https://en.wikipedia.org/wiki/French_Defence?veaction=edit
The number of uses on enwp appears to be in the same ballpark as dewp
https://en.wikipedia.org/w/index.php?title=Special:WhatLinksHere/Template:Chess_diagram&limit=900
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**Version**: unspecified
**Severity**: minor
**See Also**:
https://bugzilla.wikimedia.org/show_bug.cgi?id=53226
https://bugzilla.wikimedia.org/show_bug.cgi?id=51166
https://bugzilla.wikimedia.org/show_bug.cgi?id=71404