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 198/2010 (80) #342-92306 A B C D 1 * * * * 26 2 * * * * 36 3 * * * * 16 21 18 31 8 Survo puzzle 199/2010 (270) #353-5196 A B C D E 1 * * * * * 39 2 * * * * * 18 3 * * * * * 63 15 19 24 28 34 Survo puzzle 200/2010 (750) #363-37848 A B C D E F 1 15 * * * * * 63 2 * * * * * * 23 3 * * * * * * 85 41 31 26 21 36 16