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Chu Shogi. Historic Japanese favorite, featuring a multi-capturing Lion. (12x12, Cells: 144) (Recognized!)[All Comments] [Add Comment or Rating]
bukovski wrote on Thu, Oct 12, 2017 04:03 PM UTC:Excellent ★★★★★

Dr Muller, you mention the bare king rule as used by the Nihon Chu Shogi Renmei, but I have to wonder if your computer analysis has revealed what pieces singly or in combination are sufficient to force or at least deliver checkmate on a bare king in chu shogi.


bukovski wrote on Tue, Jun 19, 2018 02:49 PM UTC:Excellent ★★★★★

@Dr Muller: You had mentioned that you had analyzed the D document of historic chu shogi problems in MSM, had reserved the results of your analysis, and had concluded that 18 were proven flawed.  I wonder if you had reached a conclusion about the 18 like one that Mr Hodges proposed about the D document generally, that necessary pieces possibly had been omitted or erroneous pieces introduced into the diagram to act as a security device against plagiarism.  I read your suggested corrections to problems in the other 3 collections; I do not ask you to divulge more than you want about D, only to ask if your research suggested that the flawed problems might be fixed by the removal, change, or addition of pieces to the diagram.  Kind regards!


Tamás Bajusz wrote on Mon, Aug 14, 2023 07:59 AM UTC:Excellent ★★★★★

The link section should mention that Chu Shogi is playable on https://lishogi.org now as well.


A. M. DeWitt wrote on Sat, Apr 13 03:18 PM UTC:Excellent ★★★★★

When I first saw this game, I didn't think much of it, since I was more focused on larger Shogi variants, especially Tenjiku Shogi. However, now I have a few games against Jocly under my belt, and wow, this game completely blew me away. It is an absolute joy to play, despite its size and complexity (which melts away after a couple games). However, it is not flawless.

The Lion-trading rules are a bit complex, and making the Lion contagious (Like Maka Dai Dai Shogi's Deva, Dark Spirit, and their promoted forms) would make the rule much simpler while also achieving the same effect. However, this isn't really much of a problem, and may in fact be the better choice.

The real problem that I have with this game is that modern "innovations" have made the game more complicated than it needs to be. The repetition rules are quite complex, so much so that most computer programs for Chu Shogi that I know don't implement them, which is a trait borrowed from Xiangqi. The King Baring rule is completely unnecessary, as it does not add anything to the game that the combined effects of the other rules do not achieve. There is no evidence that it existed in the Edo period, so I'm not sure why someone thought it would be a good idea to mention this.

However, despite these problems, Chu Shogi is still easily among the best games of its kind. If you like Chess variants, you should give it a try.

Chu Seireigi is an attempt to combine elements of Chu Shogi with the ruleset of modern Shogi. It also has the benefit of not needing any special rules to preserve its quality, fixing all the problems with the modern "innovations" for Chu Shogi that I mentioned above. Players are disincentivized from trading off the most powerful pieces in many cases because they would just go into the player's hands, making them even more dangerous. The repetition rule is simply that of Shogi (draw, except perpetual check loses), and the drops make King-baring extremely rare. However, this comes with the unfortunate downside of having to remove all the multi-move abilities from the game, as otherwise the balancing would be thrown off.


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