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Bn Em wrote on Sat, Nov 26, 2022 04:29 PM UTC:

Fergus asked some time ago whether a piece covering the same squares as a zB but alternating between the move's arms (for which he suggested the name ‘Helical Bishop’ on account of the path's resemblance to a DNA‐style Double Helix) had already been invented. It seems we can now answer that in the affirmative: it's mentioned twice on this page, as the Zigzag Bishop. Betza also posits what Gilman would go on to call a Bruegel (t[Wzt[FAA]]; for which I initially mistook Fergus' description), as well as a piece (the t[FzDD]) ‘dual’ (in the Gilman sense) to the Harvestman of Seenschach which seems to go curiously unnamed in M&B.

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Comment on the page Revisiting the Crooked Bishop

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