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$\begingroup$ Beaten by half a move! Nice work. It seems less symmetry allows more optimization. $\endgroup$
– Vepir
Commented May 14, 2021 at 10:48
$\begingroup$ @Vepir The problem is not symmetric (Q!=K). Also, my gut feeling is that this is still not optimal. No idea why this kind of puzzle is so addictive... $\endgroup$
– loopy walt
Commented May 14, 2021 at 10:52

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