Rechteck mit Löcher

22.Problem
id = 141
status = stop: max solutions reached
time = 00:00:00.1
unique solutions = 1
using part
animate    
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Rolf LANG - Remsstr. 39 - 71384 Weinstadt | 19:57:51 up 65 days, 2:08, 3 users, load average: 5.87, 5.36, 5.50