Survo puzzles: www.survo.fi/puzzles --------------------------------------- Copyright (c) Survo Systems 2006-2007 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 120/2008 (130) #442-88 A B C D 1 * 4 * * 37 2 * * 11 * 31 3 * * * 9 47 4 10 * * * 21 52 16 47 21 Survo puzzle 121/2008 (200) #443-1832 A B C D 1 * * * * 21 2 * * * * 45 3 * * * * 54 4 * 6 3 * 16 39 45 31 21 Survo puzzle 122/2008 (500) #444-66926 A B C D 1 * * 14 * 53 2 * * * * 24 3 * * * * 16 4 * * * * 43 20 49 38 29