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 216/2010 (35) #332-60200 A B C 1 * * * 22 2 * * * 16 3 * * * 7 10 20 15 Survo puzzle 217/2010 (35) #343-35748 A B C D 1 * * 8 1 18 2 * * * * 39 3 * * * * 21 23 17 29 9 Survo puzzle 218/2010 (650) #353-14568 A B C D E 1 * * * * * 36 2 * * * * * 25 3 * * * * * 59 16 23 38 12 31