Weiqi Rapid Drill 800 Problems / Errata

Weiqi Rapid Drill 800 Problems Errata

Table of contents Table of diagrams
Problem 44: Error
Problem 44: Corrected
Problem 124: Error
Problem 124: Corrected
Problem 507: Error
Problem 507: Corrected
Problem 507: Corrected (ii)
Problem 793: Error
Problem 793: Corrected (i) 1~10
Problem 793: Corrected (i) Continuation

Problem 44

[Diagram]

Problem 44: Error

B5 = B1, W8 = W2, B9 = ko threat

Incorrect book solution forces Black to find the first ko threat.

Bill: I am surprised that W6 is in the book. It is a losing ko threat. Because of that, IMO this is not a good solution. (Note that B9 can be at "a", sacrificing the tail in return for a pon-nuki.)

[Diagram]

Problem 44: Corrected

B7 = B3, W8 = ko threat

White can no longer connect at 'a' and therefore must now find the first ko threat.

Bill: Starting with B1 looks like an improvement to me. It eliminates White's losing ko threat, which will sometimes be the right play. :)


Problem 124

[Diagram]

Problem 124: Error

Incorrect book solution results in life by two eyes.

[Diagram]

Problem 124: Corrected

With W2, Black must keep White separated with B3. W4 captures B1 forcing a seki. White is able to gain more points in this sequence than in the sequence proposed in the book.


Problem 507

[Diagram]

Problem 507: Error

Incorrect book solution results in ko.

[Diagram]

Problem 507: Corrected

B1 makes two eyes.

[Diagram]

Problem 507: Corrected (ii)

Black lives unconditionally.


Problem 793

[Diagram]

Problem 793: Error

Incorrect book solution has Black losing additional points in the corner.

[Diagram]

Problem 793: Corrected (i) 1~10

[Diagram]

Problem 793: Corrected (i) Continuation

Black gains extra points in the corner while still winning the capturing race.


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