Just go to the main forum and select the blog category called "matchstick" and then check out and try a cool puzzle.
These two option "fill" and "matchbox" were commonly used by moderator and sometimes other regular
These two features were introduced during pandemic times when train was not running due to pandemic.
That time PNR forum were temporarily closed
Same...
more... time quiz option were used by many members
Even I and many members used to post many quiz when train were not running so that many members won't feel bored.