ZarankiewiczDB,

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Matrix for z(16,22)

111111
111111
11111
11111
11111
11111
11111
11111
11111
11111
11111
11111
11111
11111
11111
111111

Found by the scaffold algorithm.

(3.571752555 seconds, score = 83, 19559 recursive calls, max depth = 29)

lower bound = 83, submitted by Andrew Kay on April 22nd, 2016 (link, raw)