Personal invitation form parameters
You can auto-initialize the personal invitation form with http get parameters.
Example
https://chessmail.de/games/invitations/member?userTo=schachomat&color=white&rated=false&timeControl=T1_3
Creates a form to member schachomat with the senders color white which is rated and has a time control of 1 move in 3 days.
Possible parameters
userTo
Member name of the recipient
color
possible values: white | black | random | both
rated
possible values: true | false
timeControl
possible values: T1_1 | T1_3 | T1_7 | T1_30
TM_D, where M is the number of moves in D days.
fen
Set a starting FEN for the game
message
Set a default value for the message, which is sent to the opponent.