Survo puzzles: www.survo.fi/puzzles --------------------------------------- Copyright (c) Survo Systems 2006-2008 The easiest way to solve these three problems may be using a new Java Applet http://www.survo.fi/swap/puzzles.html based on the swapping method. Survo puzzle 144/2009 (10) #332-57720 A B C 1 * * * 17 2 * * * 20 3 2 * * 8 16 8 21 Survo puzzle 145/2009 (90) #342-99524 A B C D 1 * * * * 15 2 * * * * 22 3 * * * * 41 23 11 17 27 Survo puzzle 146/2009 (330) #354-10268 A B C D E 1 * * * * * 23 2 13 * * * * 60 3 * * * * * 37 25 31 9 34 21