hard 7×7 Set 3 Table Grid
4-4=44-6=
5-2=4=1=4-62-
1-5=3=7=1=
2-1=4-25=7=
3-1=3=3-2-
5=3=1-1=2=
5-7=2=5=3=4=
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7451623
3724165
6245371
4136257
2513746
5367412
1672534