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z(11,14) = 45

By the scaffold algorithm, neither of the two candidate scaffolds has a solution of weight above 45.

Scaffold: $p=4$, $q=2$, $\mathbf{m}=(2,2,2,2)$, $\mathbf{n}=(4,3)$, $m_O=0$, $n_O=2$.

(0.021270581 seconds, score = 0, 99 recursive calls, max depth = 13)

Scaffold: $p=4$, $q=2$, $\mathbf{m}=(2,2,2,2)$, $\mathbf{n}=(3,3)$, $m_O=0$, $n_O=3$.

(3.61778E-4 seconds, score = 0, 0 recursive calls, max depth = 0)

upper bound = 45, submitted by Andrew Kay on April 22nd, 2016 (link)

By adding a column of weight 1 to z(11,13).

lower bound = 45, submitted on April 22nd, 2016 (link)

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