Last weekend, the US team held its qualifying test for the
World Puzzle Championship. Top scorers on the test would
join the US team in competition at the world finals this October
in the Netherlands. Similarly, the Canadian team would be formed
from the top Canadian scorers on this qualifying test.
The test consists of a number of challenging logic, math, and
word puzzles. None require any knowledge of trivia or advanced
math -- they can all be solved with paper and pencil (and eraser!),
together with logic and some simple arithmetic. Here's an example
from the test, a question I found particularly elegant. I got
the first two during the test (though I stupidly failed to record
my answers) and the last two at home that night.
In each puzzle below, the numbers in a logical sequence have
been replaced by the corresponding initial letter. For example,
the letters T, F, S, E, T, T correspond to the sequence 2, 4, 6, 8, 10, 12.
In each case, determine the original sequence.
- O T S T F T T T F F
- T O F T S F E S T N T E
- F T O S T S E F T O
- O S E F N T S T F T T E
Anyone got the answers yet? If you figure any of them out, send
the answer to me and I'll hand craft an update to this posting,
just for you. And no fair looking for the answers on the web.
Unfortunately, the test was marred by technical difficulties. A
password was needed from a web page to start the test, and that password
was unavailable to most people until sixteen minutes in. Then they
mentioned that people who started late would get extra time at the end,
but I didn't see that message until it was too late. In short,
the final standings will be somewhat unclear. It's a shame that
such a fun event should suffer from these difficulties. It's especially
silly because an event sponsored by Google should never have its web
server go down. Next year, hopefully Google will host the contest website.
[update: 06 June at 06:44]: We definitely have a winner! Zac solved all four puzzles in about
twelve minutes. Perhaps Zac can one day outsolve even Brad Bart, a
longtime high-scorer in the Canadian puzzle circuit.