Trihexagonal
Also note this:
I'm familiar with it.
And even Wikipedia has some critics on the "Loebner Prize"
Well if Wikipedia say so it must be right, though I could edit it right now, but you linked directly to the Criticisms section and skipped everything else:
"Prizes
Originally, $2,000 was awarded for the most human-seeming program in the competition. The prize was $3,000 in 2005 and $2,250 in 2006. In 2008, $3,000 was awarded.
In addition, there are two one-time-only prizes that have never been awarded. $25,000 is offered for the first program that judges cannot distinguish from a real human and which can convince judges that the human is the computer program. $100,000 is the reward for the first program that judges cannot distinguish from a real human in a Turing test that includes deciphering and understanding text, visual, and auditory input. Once this is achieved, the annual competition will end.
Competition rules and restrictions
The rules have varied over the years and early competitions featured restricted conversation Turing tests
[4] but since 1995 the discussion has been unrestricted.
For the three entries in 2007, Robert Medeksza, Noah Duncan and Rollo Carpenter,
[5] some basic "screening questions" were used by the sponsor to evaluate the state of the technology. These included simple questions about the time, what round of the contest it is, etc.; general knowledge ("What is a hammer for?"); comparisons ("Which is faster, a train or a plane?"); and questions demonstrating memory for preceding parts of the same conversation. "All nouns, adjectives and verbs will come from a dictionary suitable for children or adolescents under the age of 12." Entries did not need to respond "intelligently" to the questions to be accepted.
For the first time in 2008 the sponsor allowed introduction of a preliminary phase to the contest opening up the competition to previously disallowed web-based entries judged by a variety of invited interrogators. The available rules do not state how interrogators are selected or instructed. Interrogators (who judge the systems) have limited time: 5 minutes per entity in the 2003 competition, 20+ per pair in 2004–2007 competitions, 5 minutes to conduct
simultaneous conversations with a human and the program in 2008-2009, increased to 25 minutes of simultaneous conversation since 2010."
I entered my bot Siseneg in the Chatterbot Challenge before it went under but didn't place, though
our bots did well overall. Online-based bots are not allowed in the Loebner contest, presumably because they can access the net for info. I have him hooked up but not Demonica. You can tell when it happens because they end with "Would you like to hear more?'