Lots of spam accounts from Russia

Create a text field with your question as its title. Then under Parameters > Validation set "Authorized input" to "Custom PERL regular expression". Then for "Perl Regular Expression" specify your REGEXP to validate the question answer. Example as follows.

Title: What is ( 1 + 1 ) * 2?
Perl Regular Expression: /^4$/

In short you'd just use /^ANSWER_HERE$/, but the answer needs to be regex safe (e.g. escape periods, etc..). See the below for REGEX information.

www.regular-expressions.info/

This is typically easy for bots to complete though once they've learned the question. I highly recommend considering using CB AntiSpam when possible.

krileon wrote: Create a text field with your question as its title. Then under Parameters > Validation set "Authorized input" to "Custom PERL regular expression". Then for "Perl Regular Expression" specify your REGEXP to validate the question answer. Example as follows.

Title: What is ( 1 + 1 ) * 2?
Perl Regular Expression: /^4$/

In short you'd just use /^ANSWER_HERE$/, but the answer needs to be regex safe (e.g. escape periods, etc..). See the below for REGEX information.

www.regular-expressions.info/

This is typically easy for bots to complete though once they've learned the question. I highly recommend considering using CB AntiSpam when possible.

That was pretty easy, thank you!