Traditional Chu Shogi notation

[gbtami]

NanamiYuui asked on lishogi Discord:
"When I'm playing chu shogi, I am used to the notation system originated from Chu Shogi Tsumemono Guide (Written in 1703, scanned file can be found here in japanese: https://kokusho.nijl.ac.jp/biblio/300055778/6?ln=ja). This notation system is traditional and elegant with no use of any modern western characters or numerals. As for my understanding, described as following:

Horizontal leftward: 子，丑，寅， 卯，辰，巳，午，未，申，酉，戌，亥. and is related to ancient chinese Dizhi.
Vertical downward: 一，二，三，四，五，六，七，八，九，十，十一，十二. and is the Kanji of one to twelve.
So left up corner (12a) would be 亥一, and right down corner(1l) would be 子十二.

First I wonder is there any people who is also used to this. Second, since when I use lishogi, changing between this notation and western style sometimes confuses me or require much time, is it complicated to add this notation system to the notation list, can it be added? I would call it Yorozuya Notation, in which Yorozuya is the writer of Chu Shogi Tsumemono Guide.

Also, it needs to be noted that the origin notation is different in direction with the Japanese Chu Shogi Association version of Yorozuya Notation which ranges horizontally rightward and vertially upward.

Thanks so much for you guys' understanding and support!"

[WandererXII]

Thanks for posting it here.

Does it make sense to make this available for all variants, or would this mean we would have to have separate notation for chushogi?

Everything else but the coordinate system would be the same - pieces, disambiguity resolution, etc.?

[NanamiYuui]

@WandererXII It could be used for any shogi variants smaller than 12*12 since the horizontal has only twelve "Dizhi". I personally think nothing else needs to be changed; the existing version is quite perfect (except for the absence of AI mode, but it would be a complicated program, isn't it.) Thank you so much for your help! Feel free to ask me for any more information needed.

[NanamiYuui]

Supplement: the disambiguity resolution is almost the same as the Japanese notation.

Btw, in the original Chu Shogi Tsumemono Guide, the ”成” is written as katakana ナル, and "不成" is left blank. I think both ways are fine; you may choose any of them.
eg: 卯三龍 = 4三龍不成; 卯三龍ナル = 4三龍成.

Also, in the book, only the final coordinate is written when the Lion moves two times without taking any pieces. I also think both ways are fine.
eg: 6三・6二獅 => 巳二獅; 6三(take a enemy piece)・6二獅 => 巳三・巳二獅; 6三(take a enemy piece)・6二(take another enemy piece)獅 => 巳三・巳二獅;