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 213/2010 (160) #442-30558 A B C D 1 * * * * 43 2 7 * 14 * 33 3 * * * * 24 4 * * * * 36 30 39 57 10 Survo puzzle 214/2010 (1000) #443-54088 A B C D 1 * * * * 44 2 * * * * 23 3 * * * * 38 4 * * * * 31 25 55 12 44 Survo puzzle 215/2010 (12000) #454-79532 A B C D E 1 * * * * * 17 2 * * * * * 38 3 * * * * * 85 4 * * * * * 70 48 54 30 35 43