ZarankiewiczDB,

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Matrix for z(8,24)

1111111
111111
111111
111111
111111
11111
1111111
1111111

Found by the scaffold algorithm.

(0.03160262 seconds, score = 50, 67 recursive calls, max depth = 28)

lower bound = 50, submitted by Andrew Kay on April 22nd, 2016 (link, raw)