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Phi 2012

Start date: Aug. 14, 2012, 8 p.m. UTC Solution: HERE
Count tilings of a narrow but long rectangle with tiles of size 1x1 or 2x2.

Stats:

2134 started 22 silver awards 33 golden awards

Hall of fame:

1
Robin Lee
Time: 29 minutes
2
Adam Karczmarz
Time: 35 minutes
3
Gabriel Rea Velasco
Time: 1 hour, 1 minute