Rechteck mit Löcher

22.Problem
id = 141
time = 00:00:00.4
unique solutions = 0
animate    
XML
Rolf LANG - Remsstr. 39 - 71384 Weinstadt | 23:21:13 up 74 days, 5:31, 0 user, load average: 5.37, 4.97, 4.79