ZarankiewiczDB,

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Matrix for z(15,29)

111111
111111
111111
111111
111111
111111
111111
111111
111111
111111
111111
111111
1111111
1111111
1111111

Found by the scaffold algorithm.

(396.544848489 seconds, score = 93, 6643565 recursive calls, max depth = 48)

lower bound = 93, submitted by Andrew Kay on July 26th, 2016 (link, raw)