Rechteck mit Löcher

22.Problem
id = 141
time = 00:00:00.4
unique solutions = 0
animate    
XML
Rolf LANG - Remsstr. 39 - 71384 Weinstadt | 20:13:29 up 76 days, 2:23, 2 users, load average: 4.65, 4.87, 4.89