Rechteck mit Löcher

great-puzzle
id = 86
status = timer expired
time = 00:30:00.3
unique solutions = 0
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Rolf LANG - Remsstr. 39 - 71384 Weinstadt | 19:50:19 up 76 days, 2:00, 2 users, load average: 5.63, 4.99, 4.87