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 | 19:23:51 up 73 days, 1:34, 1 user, load average: 5.53, 5.32, 5.23