Knight's Challenge in D

[Georg Wrede]

BCS wrote:
> Georg Wrede wrote:
> 
>> Chris Miller wrote:
>>
>>> Hmm...  Excellent point.  I'll have to rethink my submission
>>> mechanism.  I was going to give an email address, though sadly
>>> whenever I put it on the 'net in one more location, that invariably
>>> creates more spam for me.
>>
>> On a web site you could put the mail address simply in a picture.
>>
>> And another idea: many big sites have these distorted text string 
>> pictures you have to type in, sort of like a password to prove that 
>> you're human. Now, most of these are entirely random, computer 
>> generated, and whatever else fancy.
> 
> http://www.captcha.net/
> 
>> Never pay for a lock stronger than the door. -- Anon.
> 
> Never pay for a door stronger than the wall next to it.

Ah, captcha is free. The better!

Never pay for a door if you can get it for free. -- Ibid.