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🕸Fergus Duniho wrote on Thu, Jun 24, 2021 07:06 PM UTC in reply to Ben Reiniger from Wed Apr 21 03:35 AM:

The Classified Encyclopedia has an entry for Quantum Chess, but it's a different game (seemingly the one described in Variant Chess 17);

Yes, it's a different game. It is a proprietary game by Quantum Development Corp from 1993.

did this game appear in the original Encyclopedia and get replaced/removed in the new one?

The original Encyclopedia did have an entry for "QUANTUM C", but it described a different game, one invented by Douglas A. Engel in 1968 and played on a 6x8 board.

However, the game described on this page is the game described in Variant Chess 25, and that issue credits it to the author of this page.

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