Survo puzzles: www.survo.fi/puzzles --------------------------------------- Copyright (c) Survo Systems 2006-2012 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 273/2012 (700) #443-46030 A B C D 1 * * * * 38 2 * * * * 11 3 * * * * 29 4 * * * * 58 43 32 24 37 Survo puzzle 274/2012 (730) #443-69060 A B C D 1 * 2 * * 18 2 * * * * 47 3 * * * * 39 4 * * * * 32 43 16 53 24 Survo puzzle 275/2012 (380) #443-31580 A B C D 1 * * 12 * 52 2 * * * * 42 3 * * * * 15 4 * * * * 27 40 17 31 48