The Chess Variant Pages

This page is written by the game's inventor, Jörg Knappen.

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Jeremy Good wrote on 2014-09-18 UTCExcellent ★★★★★
Jörg, I very much enjoy the game and exploring these pieces. You are a very good variant designer and thinker about chess variant fairy pieces.

I also like Quinquereme and I'm very excited one day to try experimenting with your CwDA army, Sai Squad (as well as your other CwDA armies). 

I am trying to get an idea for an estimate of the strength of these Nachtmahr pieces - I believe the Rose is strongest, maybe followed (in order of strength) by straight wide crooked nightrider, quintessence, regular nightrider, diagonal wide crooked nightrider and diagonal narrow crooked nightrider. Any thoughts? Maybe after more experience, I will have a better theory - these are just vague guesses.

How might the Nachtmahr army fare against FIDE? It's commonly thought that a normal nightrider is worth as much as a rook on an 8 x 8 board. I suppose the Nachtmahr army would handily defeat the FIDE army...


If you please, what are the names for pieces other than rose, nightrider (qua nightrider) and quintessence? In your notes, you mention a French and German name but you don't say which piece specifically these names apply to...

Also, Carlos and I are having a bit of discussion about the Quinquereme - he created a nice diagram which you can see here:

I have ideas about some other nightriders one might develop for fun and a sort of game design for a Nachtmahr 2 (which I might call something more akin to "a dream") introducing some of these other nightriders.

Please email me if you're interested in discussing or as a courtesy, I shall email you when I've come up with an actual variant. It too will be a "study game" but maybe playable as well...certainly I am having fun playing Nachtmahr right now and it's, at the very least, helping me to become more familiar with how these pieces move.

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