Rechteck mit Löcher

70.Problem
id = 165
status = timer expired
time = 00:30:00.2
unique solutions = 0
animate    
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Rolf LANG - Remsstr. 39 - 71384 Weinstadt | 20:51:55 up 75 days, 3:02, 0 user, load average: 5.39, 5.02, 4.93