To check which players are inactive in an alliance, first enter the alliance link: Please enter the alliance link.
then click:
List: Only players with castles (default) All players
Link style: Lords & Knights (default) Xmas edition
A player can have no castles if they have lost all of their castles and not yet logged back in.
An alliance with a number of players without castles is a sign that they may be using bots or alt accounts.
Lords and Knights and the XMas edition of Lords and Knights use different styles of links. The two applications are otherwise identical except for cosmetic differences.
Lords and Knights uses links that look like l+k://... whilst the Xmas editing uses links like lkxmas://...
Selecting the wrong one and the links either won't open for you or if you have both apps installed then it will open in the wrong one.
We report a player as active if we can see some change (capture a castle, develop a castle, rename a castle, join an alliance, etc), and inactive if there is no evidence of the player being active.