Showing posts tagged: tsumego


Sunday Problem #48

Like Problem #12, this is from the Collection of Tsumego Masterpieces by Sekiyamas Riichi, Toshio, and Toshimichi. This time, Black has to try to make life in a very cramped corner setting.

Black to play.


Sunday Problem #47

It looks like this white corner group is difficult to capture unconditionally, but there is a surprisingly clean sequence hiding in plain sight.

Black to play.

Solution
Failure (1)
Simply turning with black 1 is not enough. White claims the key point of 2, and then for example black 3 and 5 get refuted by White’s 4 and 6. White …

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Sunday Problem #46

Like last week’s problem, this is also a classic tesuji problem.

Black to play.

Solution
Solution (1)
Black does not have much choice but to start with 1, but in response to this White launches the attachment of 2. After this, the rest of the problem is about how Black can avoid having to fight a kō.
Black’s 3, 5, and 7 are the key tesuji combination. Following, even though White can capture two stones with 8–
Solution (2)
–Black recaptures with 9, and wins the capturing race directly.

Sunday Problem #45

This is a classic tesuji problem. I unfortunately don’t know the origin; my source material is a tsumego printout from a dōjō I used to go to when I was insei.

Black to play.

Solution
Solution
Black’s first-line peep of 1 is correct. To keep attacking, White has to connect with 2, but then 3 ensures Black’s group has four liberties and so she wins the capturing race.

Sunday Problem #44

This problem is from Nihon Ki-In’s 150, or 150 Graded Life-and-Death Problems for 7-Dan Players.

Although this shape is hardly anything that could occur in a real game, personally I like this problem because of its straightforward and yet extremely non-obvious solution.

Black to play.

Solution
Solution (1)
For Black’s first moves, there is nothing else to …

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Sunday Problem #43

This problem is from Guanzi Pu. Black needs to think of an unconventional response to White’s second-line peep on the right side.

Black to play.

Solution
Solution
Black’s unlikely jump of 1 is correct, and the only choice for the first move. If White cuts with 5 in response, Black can form life in the corner and capture White that way.
However, our reading should not end after black 1, as White still has a resistance available. White 2–6 manage to create a two-step kō for life that Black cannot prevent.
Instead of 3, Black can also pick the move order of 5-6-3-4.

Sunday Problem #42

This problem is of dubious origin. I copied this diagram from a tsumego collection composed by Ishida Yoshio 9p for the 24th Hiratsuka go festival; but, as there are some classic problems within the collection, it is not certain whether this is an original problem by Ishida or not.

Black to play.

Solution
Solution
Black’s cut of 1 is the …

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Sunday Problem #41

This is an original tsumego by me. The solution sequence for this is not particularly outstanding, but as a tsumego this has value in that this position can easily result from a particular 3-3 invasion jōseki.

Black to play.

Solution
Solution
Black’s straightforward attack with 1–5 is correct, and the result is a two-step kō.
Black can also start by attaching at
a, after which white b and 1–5 follow; the result is practically the same.

Sunday Problem #40

This is a problem from Chō Chikun’s Yose no Tesuji (), or Endgame Tesuji.

Black to play.

Solution
Solution
Black’s attachment of 1 is the key move. If White tries to resist with 2, then he gets captured by 3–5.
Instead of 2, White has no choice but to play 3 himself and sacrifice the two stones to the right.

Sunday Problem #39

Last week we had an extremely difficult problem, so I picked an easier one for this time. This problem is so classic that it is hard to say where it is originally from; my guess would be one of the classic tsumego collections.

Black to play.

Solution
Solution
Black 1 and 3 are an exquisite move order. White has no resistance available and, up to 7, White is captured.
7 at 5
Failure
Black 1 here is wrong. This time, Black can only manage a kō for the white group’s life.