One Thousand and One Life-and-Death Problems / Errata

It is of course completely possible that the readers are mistaken about the 'mistakes', so please add if you know more!

Thanks to Bozulich for this great book. The lack of explanations in the book really motivates one to look further and work on the problems in depth.

--Skelley

Table of contents

Errata

Page 44, problem 168, solution diagram

[Diagram]

Solution diagram

"If Black turns at 1, White can't stop him from getting two eyes."

[Diagram]

White can make seki (6 at 4)

However, White can obtain a seki by playing with W2 and W4.



Page 77, problem 300, problem diagram

Problem 300 is described as "Black to kill" and is in the section labelled "One-move problems - Black to kill" when it is actually Black to live.

Page 82, problem 316, solution diagram

[Diagram]

Problem 316

"Black peeps at B1. If White a, Black b. If White b, Black c also kills White."

The c is omitted in the diagram.

Note: The c can be either of the two [circled point] points.



Page 100, problem 386, solution diagram

[Diagram]

Solution

The text says "Black B1 creates a dead eye space. If White a, Black b. If White c, Black d."

However, there are no c and d on the diagram.

It is possible that the intended sentence is "If White b, Black a."



Page 106, problem 408, solution text

"corner" rather than "cornert".

Page 144, problem 572, solution diagram

[Diagram]

Solution

"With B1, Black gets two eyes because it makes miai of the points W2 and B3."

[Diagram]

Seki

Obviously white can just play W4 to make a seki.



Page 183, problem 751, problem diagram

[Diagram]

Problem diagram

"Black to live"

[Diagram]

Solution diagram

"Black plays B1, sacrificing two stones. After White captures with W4, Black B5 makes a second eye."

[Diagram]

The error

Actually, Black can just connect his stones at a or b since White cannot make a false eye on the left. This way he does not have to sacrifice two stones to live.

Obviously, the WC stone should be removed from this problem for the intended solution to be the best solution.



Page 184, problem 752, solution diagram

[Diagram]

1

"B1 is the vital point. Black B3 and B5 are obvious. Black has two ways to make his second eye."

[Diagram]

2

Instead of W4, White can extend at B5 in Diagram 1, and Black does not have enough liberties to play at W4, and so must capture the four white stones...

[Diagram]

3

Now White can play back under the stones to form a 10,000 year ko. The book states none of the "Black to live" solutions involve ko...

/Problem 752 - Mannenko Discussion



Page 194, problem 799, problem and solution

The book explicitly states that there are no problems that need a ko to solve, but in this one the answer doesn't mention a move by white that forces a ko!

The solution given in the book:

[Diagram]

Claims that black can win with no ko

But if white plays W4 at B5, white can make a ko! Watch:

[Diagram]

White can force a ko

And now we have an approach ko for white, which, if won, kills black.

(B5 at W6 is a direct ko.)



Page 231, problem 966, problem diagram

[Diagram]

White lives

The problem says "Black to kill", but White can live with this sequence.



Multiple solutions

Page 64, problem 244, solution diagram

[Diagram]

Solutions

Solution diagram gives B1 as the solution. However, Black a works too.



Page 228, problem 945, solution diagram

[Diagram]

Solution

The solution in the book shows this sequence as a solution. However, having B1 to directly hit the vital point at B3 is also a solution (think incomplete bulky five).


This is a copy of the living page "One Thousand and One Life-and-Death Problems / Errata" at Sensei's Library.
(OC) 2007 the Authors, published under the OpenContent License V1.0.
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