# Weiqi Rapid Drill 800 Problems / Errata

Weiqi Rapid Drill 800 Problems Errata

### Problem 44

Problem 44: Error

= , = , = ko threat

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

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

Problem 44: Corrected

= , = ko threat

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

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

### Problem 124

Problem 124: Error

Incorrect book solution results in life by two eyes.

Problem 124: Corrected

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

### Problem 507

Problem 507: Error

Incorrect book solution results in ko.

Problem 507: Corrected

makes two eyes.

Problem 507: Corrected (ii)

Black lives unconditionally.

### Problem 793

Problem 793: Error

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

Problem 793: Corrected (i) 1~10
Problem 793: Corrected (i) Continuation

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

Weiqi Rapid Drill 800 Problems / Errata last edited by 68.15.102.215 on August 16, 2010 - 09:40