Survo puzzles: www.survo.fi/puzzles --------------------------------------- Copyright (c) Survo Systems 2006-2010 The easiest way to solve these three problems may be using a Java Applet http://www.survo.fi/swap/puzzles.html based on the swapping method. Survo puzzle 207/2010 (1200) #443-40096 A B C D 1 * * * * 44 2 * * * * 30 3 * * * * 25 4 * * * * 37 12 24 45 55 Survo puzzle 208/2010 (1000) #443-53772 A B C D 1 * * * * 45 2 * * * * 24 3 * * * * 30 4 * * * * 37 43 56 24 13 Survo puzzle 209/2010 (220) #443-61096 A B C D 1 * * * * 17 2 * 3 * 5 26 3 * * * * 52 4 * * * * 41 33 20 53 30