This weekend is a puzzle contest at LMI titled " Melon's Puzzle Zoo".
The author is Palmer Mebane.
The test will begin at 00:00 GMT on 26th Feb and end at 00:00 GMT on 28th Feb 2011. The duration of the test is 2 hours.
Discussions on this test at LMI are here.
The submission page and IB are here.