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Go - Weiqi - Baduk
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A place for players of Go / Weiqi / Baduk and anyone who wants to learn.
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founded 1 year ago
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Game I played this morning as White where I lead for most of the game and ended up winning. However both players missed a huge move. A thermonuclear fusion tesuji if you will. Can anyone spot the move that would win black the game from the jaws of defeat?
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A game I played a few years ago against a bot while I was learning the game. Cat decided to come finish the job (I was white and its black to play)
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Tsumego Hero is one of my favorite online tsumego sources, along with 101weiqi. I like the large number of problems from different collections and being able to do subsequent related problems for a topic, in contrast to random problems like on blacktoplay.
Today I decided to give that site another look (did only 101weiqi for a while) and found that they have a time-limited mode with different unlockable levels, very similar to the popular "strength test" on 101weiqi or badukpop. I just did a couple of problem sets and it looks very polished, which is amazing if you consider it's just made by few people (mainly Joschka Zimdars), doesn't have ads and no premium subscriptions. (You can get some donation perks but it only requires a one-time donation and you really don't need the perks like more board textures.)
My personal approach is doing tsumego from different sources, I like both apps, different websites but also have tsumego books and do tsumegos from go journals. I thing seeing different styles is useful and that way it's more fun and less monotonous.
(Here some hashtags because I want to share this post on my mastodon as well, thanks to federation, and there they help: #baduk #weiqi #go #gogame #tsumego #goproblem)
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Besides this being a news for Ichiriki Ryo now had a lead of 3 to 1 against Iyama Yuta (just 1 more win to get the Honinbo title), the scoring of this game also showed a quite rare situation, when they played more than 361 moves (total 364 moves for this game). One side completely filled up during manual scoring, and had to count stones off the board.
In the case of this game, it was filled to one side with 4 space left on the board for black, and 3 extra white stones off the board, hence 4 vs -3, so black win by 0.5 in the end { 4 - (-3) - 6.5 komi}. (If you found odd that the total count are 360 stones, but there are 364 moves, it is because they run out of stones, so they had to exchange two prisoners during the final dame filling phase in order to finish the game)
The sgf record can be found here http://eidogo.com/#Pbj2YrFZ:0,364
BTW, this is also a game where the Japanese rule and the Chinese rule give different results. With 6.5 komi, the Japanese rule gives B+0.5, but with 7.5 komi in the Chinese rule, it is W+0.5 (or W+1/4 子 with Chinese half counting of total 184 black area => {184 - 3.75 - 180.5 = -0.25}). Also notice, this is not solely because the Chinese rule has more komi, but more to do with white plays the last move. In games where black plays the last move, the result might be the same (cases with seki and how the last ko is filled can raise more tricky situations and differences).
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This is a game played on June 19 between Ueno Asami (as black) and Fujisawa Rina (as white). At move 159, Asami cut with K14.
It involves a followup of the life and death of the white group M10, and most human players would be able to judge it, but AI (from Golaxy to Katago) all seem to deem it "alive" and continue to fight without securing the life of that group first. While a human player can read out the sequence like Rina did during the game and make the right choice.
But it takes like 10k+ playouts before AI realize the K14 cut is a very good move, and (with few playouts AI even judges K14 as a blunder). And it takes millions of playouts before AI realizes the M10 white group is in trouble.
What other AI blindspots and hallucinations have you seen in real games?
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Kids are creative, and smart kids will get bored very quickly, even if repeat exercises are necessary practice for them.
(There is no badukshitposting community on lemmy. Maybe we should accommodate more diverse posts here).
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I've heard of the "carving" about weiqi, but never actually saw it, or even saw a picture of it till I start researching the history.
The report in the link was written by the head of the Luoyang Weiqi Museum, so I am farily confident the authetisty of the pictures she took. And I will make a brief translation and introduction below:
First of all, these carvings are called 畫像石. a very specific styles of carvings used in the Han Dynasty China (the 2nd century BC to the 2nd century AD). So very high confident it is of its time.
Here are the overall picture of the stone the carving is from
The dimension is 254 cm in length, 85 cm in height, and 26 cm thick, weight more than 1000 kg.
We can see other recreation activities next to the "博弈", people were dancing and playing some kind of instrument (likely some kind of drum, or bell).
There are other carvings of some daily activities in the back of the stone as well
In the close up shot, we can see there are two types of game boards carved on the stone, one is Go in the front, and another smaller board on the side, called 博 (where only recently we've uncovered the actual game board for it), and Go has been associated with it for a very long time - "博弈". We are certain they were both quite prominate during the Han Dynasty (probably more for 博 than weiqi).
Very hard to make out the number of lines on the carving, it degraded quite a bit. But it is for sure more than 9 lines or 13 lines, and on the range at least 15 plus even up to 19. (simply cannot tell for sure, and cannot rule out the original stone worker made it incorrectly to begin with)
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