CISRA Puzzle Competition 2007

This is the archive of the 2007 Puzzle Competition. Please visit the current competition site for information about the latest Puzzle Competition.

Puzzle Week is now finished. Full solutions to all puzzles are now available. The competition closed at 9:00am AEST Monday 23 April. Be sure to check back next year in February for details of the 2008 competition!

The competition was open to everyone. Teams of Australian students were eligible for prizes of Canon digital cameras.
See the competition rules for full details.

CISRA is Canon Information Systems Research Australia, a leading research and development centre for Canon.


26 April
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23 April
The 2007 competition is over. Congratulations to the winners! Special mention goes to yope who solved every puzzle without needing any hints, for the maximum possible score of 100.

Competition winners      Prize winners        
1    yope1    Random No.
2    Beastmasters2    Team Room
3    CoreyPlover3    Phwoar

(See the team stats page
for the final scores and
rankings of all teams.)

We hope you had as much fun solving the puzzles as we did creating them. Please give us any feedback you have, positive or negative, so that we can improve future events!

Worked solutions for each puzzle can be found on the puzzle page, and the full guess log can be viewed here.

Last but not least, if you are a final-year student interested in working at CISRA next year, don't forget to register at the gradsite!

More news.

2007 Competition Dates

  • 28 February - Site open for team registration. Group 1 puzzles released.
  • Mon 16 April - Puzzle Week begins. Group 2 puzzles released.
  • Tue 17 April - Group 3 puzzles released. Hints released for Groups 1 and 2.
  • Wed 18 April - Group 4 puzzles released. Hints released for Groups 1, 2, 3.
  • Thu 19 April - Group 5 puzzles released. Hints released for Groups 1, 2, 3, 4.
  • Fri 20 April - Hints released for Groups 3, 4, 5.
  • Sat 21 April - Hints released for Groups 4, 5.
  • Sun 22 April - Hints released for Group 5.
  • Mon 23 April - Competition closes. Provisional prize winners contacted to verify eligibility. Full solutions released.

All puzzle and hint releases are at 9:00am Australian Eastern Standard Time (11:00pm GMT the day before).


Administrative and technical inquiries to the CISRA Puzzlers: