Mathematcis
jrosenhouse | July 1, 2012I haven't tried to solve this yet, but considering the headline I feel honor-bound to give it a try. It's a pity it wasn't available in time to include in the Big Sudoku Book, since we have a section discussing how the difficulty of a puzzle is determined.
jrosenhouse | June 7, 2012The commenting problems are proving harder to fix than I expected. The overlords have assured me that this is a high priority problem and that they are working on it. Apparently there is only one other blog around here that has been similarly affected. I don't want to return to regular blogging until the commenting issues have been fixed, since without comments it feels like I'm just talking to myself.
But just to make it clear that I'm still around, here's an amusing logic puzzle from Raymond Smullyan, from his book Forever Undecdied. Recall that on the island of knights and knaves,…