From: Lyndon Samson Date: 2005-04-23T20:31:58+09:00 Subject: Idea for Ruby Quiz - Su Doku solver How the following look? From http://news.bbc.co.uk/1/hi/magazine/4469719.stm For those who don't know, it's a puzzle found in newspapers, books and online. A simple-looking grid of nine rows by nine, split into nine boxes, each containing nine squares, it looks like just another numbers game. But, say Su Doku experts, the difference is it can be played using logic alone, so maths phobics read on. To be pure Su Doku each of the unique puzzles - which come in varying levels of difficulty - must have only one solution. The aim? To fill in the grid so that every row, every column, and every box contains the digits one to nine -- Into RFID? www.rfidnewsupdate.com Simple, fast, news.