Survo puzzles: www.survo.fi/puzzles --------------------------------------- Copyright (c) Survo Systems 2006-2008 The easiest way to solve these three problems may be using a new Java Applet http://www.survo.fi/swap/puzzles.html based on the swapping method. Survo puzzle 159/2009 (220) #362-39042 A B C D E F 1 * * 14 * * * 45 2 * * * 16 * * 74 3 * * * * * 8 52 39 7 47 36 14 28 Survo puzzle 160/2009 (500) #363-23570 A B C D E F 1 * 12 * * * * 66 2 * * 7 * * * 49 3 * * * * * * 56 42 31 26 51 14 7 Survo puzzle 161/2009 (1100) #363-44528 A B C D E F 1 * * * * * * 29 2 * * * * * * 55 3 * * * * * 17 87 41 11 23 32 28 36