Week 25-31 Jan., 2009 Puzzle 476: J. K. Andersen, Dan Dima, Farideh Firoozbakht. Posted on Saturday, January 31, 2009

Week 10-16, Jan., 2009 Conjecture 61: J K Andersen & Jan van Delden Posted on Sunday, January 18, 2009

Week Jan 3- 9, 2009 Puzzle 416: J. K. Andersen Puzzle 473: Farideh Firoozbakht & J. K. Andersen Puzzle 474: Farideh Firoozbakht, Jim Howell, Qu Shun Liang, Jim Van Delden & Edwin W. Clark & J. K. Andersen Problem 13: J. K. Andersen Posted on Saturday, January 10, 2009