An introduction to tGo and a javascript viewer for tGo SGF data from Little Golem Go forum
14 replies. Last post: 20171204
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Malcolm Schonfield at 20170615
I would welcome feedback on this new article I’ve written: An introduction to toroidal Go.
Also, I’ve made a tool for reviewing tGo games from little Golem. It’s alpha software and provided on an “as is” basis: link.Cheers!

ypercube at 20170616
Thank you for the great article.
Regarding sizes, what would you think of a rectangular torus board? Examples: 9x17, 5x17, 7x15, 11x19, 7x19, 5x19.

ypercube at 20170616
I created a user tournament: Torus Torus, Torus 2017
Two games per opponent, starts in June 20.

gamesorry at 20170617
I’m getting the following error when trying to register for the tourney:
HTTP ERROR 404
Problem accessing /ng/a/index.jsp. Reason:
/ng/a/index.jsp
anyone seeing the same?

Malcolm Schonfield at 20170618
Hi Gamesorry, I was able to register with no problems using Chrome on an android phone. Maybe you could try using a different browser? Also the one time I had a technical problem on little golem (it involved a triple ko!) I raised the ticket at the following URL and it got sorted out very quickly:
bitbucket.org/rmalaschitz/littlegolem
http://bitbucket.org/rmalaschitz/littlegolem

gamesorry at 20170618
Oh I just looked it up in the User Tournament page instead of the clicking on the link above, and successfully registered.
It might have something to do with the url:
success: https://www.littlegolem.net/ng/a/Ctrn.action?dto.id=1065&view=
failure: https://www.littlegolem.net/ng/a/Ctrn.action?view=&dto.id=1065

Sighris at 20170619
Malcolm Schonfield, very cool! Thanks for sharing!
ypercube ★, Interesting idea / question.
Another TGo possibility is to add a shift/twist (literally) into the mapping of the surface such that on the 5x5 TGo game with 25 intersections named:
 E1 E2 E3 E4 E5
 D1 D2 D3 D4 D5
 C1 C2 C3 C4 C5
 B1 B2 B3 B4 B5
 A1 A2 A3 A4 A5
“A1” would connect to “B5” (instead of A5); “B1” would connect to “C5”; “C1” would connect to “D5”; and "E1" would connect to “A5” (instead of E5)....
The above is a one unit shift/twist; but a 2 or more unit shift could also be done.

ypercube at 20170620
@Sighris yes, that’s another way to wrap a square in a torus.
I think there are other way as well, to wrap a torus. Not necessarily with a rectangular shape.
Example, with shifts both vertical and horizontal and an a shape of a 3x3 square with a square removed:
A3 B3 C3
A2 B2 B3
A1 B1
The tiling:
C2 A1 B1 A3 B3 C3 ...
A3 B3 C3 A2 B2 C2 ...
A2 B2 C2 A1 B1 ...
A1 B1 A3 B3 C3 ...

Malcolm Schonfield at 20170625
@ypercube, about your question "what would you think of a rectangular torus board? Examples: 9x17, 5x17, 7x15, 11x19, 7x19, 5x19"
Yes, these would probably be nice spaces to play Go on. I don’t think it necessary has to be odd numbers. Still, I would expect the game to be have less strategic potential with narrow boards. It could be nice to compare 7x19 (=133 points) with 11*11 (121 points).
@Sighris and ypercube, I hadn’t thought of that. I would call these variants “twisted toroidal Go”. These also would be nice spaces to play Go on.
Thanks both of you for your kind words about my article.

Sighris at 20170701
ypercube ★, Interesting.... IIRC, two squares, one smaller than the other, can also be used to map a torus and doing so requires a “twisting” {meaning ALL of BOTH the X and Y coordinates/lines pass through the center/hole of the torus (and wrap around the “outside”. If I can find some spare/entertainment/math(geometry)fun time I will explain that more clearly later.
Malcolm Schonfield, yes, it would be interesting to "compare 7x19 (=133 points) TGo with 11*11 (121 points) TGo!  but my intuition (which might be wrong) says that a square mapping (11x11) would be more interesting, or at least easier to comprehend for Go players use to playing on a square board, than the rectangular 7x19 (=133 points) mapping... what if we took the rectangular idea to the extreme, what would it be like to play on a 3x50 (150 points) TGoBan? Superweird? It would look like... no, it would _{be} that every stone played was a wall of stones with a 2space hole in the wall on each side of the single stones; like this: OOXOOXOOXOOXOOXO... even though all of the stone(s)/X would be the same stone/X! And with one more move/play (just two moves) a player could make (two) wall(s) like OXXOXXOXXOXXOXXO... spaced 149 intersections apart. That would get very weird very quickly IMO. 
Malcolm Schonfield at 20171203
The tournament has just ended as I resigned my last game. Congratulations to gamesorry for winning! Some very interesting games were played.
On a different topic: at the moment I do feel that the komi is bit too small. I reckon 7.5 would be better than 4.5. How do other players feel? 
gamesorry at 20171204
@Malcolm
Thanks! It was a close competition w. After I lost to William Fraser I thought there was no chance I could win the tournament (I think I was behind at certain points in both of our games). Every game was tough and interesting – TGo definitely introduced some new skill set into go.
Regarding the komi, I don’t have a strong idea about how much it should be. In this tournament my winning rates for black and white seem to be the same – but that’s too small number of samples and maybe we could summarize the overall winning rate of taking black with the current komi and come up with an idea :)