ZarankiewiczDB,

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z(15,28) = 91

111111
111111
111111
111111
111111
111111
111111
111111
111111
111111
111111
111111
11111
1111111
1111111

Found by the scaffold algorithm.

(180414.627925918 seconds, score = 91, 1592500300 recursive calls, max depth = 47)

weight = 91, submitted by Andrew Kay on May 9th, 2016 (link, raw)

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