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 282/2012 (75) #343-66600 A B C D 1 * * * * 13 2 * * * * 23 3 * * * * 42 13 17 26 22 Survo puzzle 283/2012 (500) #443-76128 A B C D 1 * * 3 * 22 2 * * * * 48 3 * * * * 37 4 * * * * 29 45 15 23 53 Survo puzzle 284/2012 (1050) #443-27948 A B C D 1 * * * * 49 2 * * * * 41 3 * * * * 19 4 * * * * 27 19 55 38 24