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Life & Death - Elementary - 239

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In the game of Go, attacks can be used to get an advantage on the board. When attacking a group, killing is not the first objective. Instead of that a group can be attacked to gain influence, gain territory, stabilize their own group, create thickness or many other reasons. This collection teaches the best ways to attack groups to get an advantage on the board.

Igo Hatsuyoron (literally: Production of Yang in the Game of Go) is a collection of 183 go problems mostly life and death problems, compiled in 1713 by the Japanese go master Inoue Dosetsu Inseki. The problems in this collection have a very high difficulty, so discussion of solutions might not always be possible.

Customizable collection index page

The collection index page got a makeover, which makes use of the newly introduced tags. You can set filters for three categories: Topics, Difficulty and Tags.
Further, there are two grouping parameters: Collection types and collection sizes. The type is set to one of the three filters. In this example, the type is difficulty, which groups the problems in collections for the rank. The applied filters remain set on the problem pages until they are changed or removed.

Tags, proposals and rewards

We need your help! The problems on this website are currently uncategorized, which we should change. The goal is to assign matching tags to every problem. All users that have passed level 40 or 6k are welcome to help with this meaningful task. There are amazing rewards for those who help with adding and creating tags and/or proposals. So the next time you see a problem, for example, with a Seki, a Snapback or an Under the Stones tesuji, leave a tag.
It is now also possible to make proposals for improving the problem files. You select "Make Proposal", modify the move tree and save. An admin is going to check and approve the changes. For getting rewards, a point system has been implemented: Add tag (1 pt), create new tag (3 pts), make proposal (5 pts). Any contribution has to be accepted by an admin to become public. Rewards have been deactivated as they were meant for the early phase of tags to get it running.

Account management

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Today we start publishing all problems from the Diabolical Vol. 1 book. That is 100 boards with each containing 4 or more problems. Props to posetcay for adding the missing solutions and greetings to David Mitchell, who is the author and also a friend of the website for several years. PDFs and more books by him and his association can be found here: australiango.asn.au/aga-books

This collection covers full board positions, mostly from professional games. The task is to choose the best move from the given options. The problems were checked with AI for correctness.

In the game of Go, to solve crucial situations, one has to master the different techniques that the game presents. Those techniques, also known as Tesuji, are presented in this collection. The first topics and the first Tesuji techniques to master are ladders (Shicho) and nets (Geta).

Kageyama says "If you want to capture stones, hold up two fingers and say to yourself: 'Can I capture with the net?' and 'Can I capture with the ladder?'"

This series written by Kano Yoshinori in 1985 covers a large range of fundamental topics. Volume 1 contains problems about recognizing atari, ladders, snapbacks and basic life and death problems. Created for Tsumego Hero by Stepan Trubitsin.

There's a saying in Go that your overall strength is limited by your endgame strength. Even if you are leading a lot in the opening and middle game, mistakes in endgame can still lose you the game. This collection allows you to practice and level-up your endgame in a small 9x9 board with real-game examples.

Sometimes sacrifices are necessary in order to kill, but how many stones can you sacrifice before killing? That's the question this collection aims to answer.

Yi Kuo is a classical kifu and tsumego book written by Huang Longshi (1651-1700). It was posthumously published in 1710. Go Seigen once commented that Longshi's fighting skill was of 13-dan strength. The problems in this collection are focused mainly on endgame tesujis.