Weiqi Rapid Drill 800 Problems / Errata
Weiqi Rapid Drill 800 Problems Errata
Problem 44
![[Diagram]](../../diagrams/2/bb696a428e40a2bee5cb2ee9be9ac576.png)
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.)
![[Diagram]](../../diagrams/49/bba4709d04d38f9feb3b10d45a6a875b.png)
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
![[Diagram]](../../diagrams/49/342284c0876aa4d52773a7a4f6ea5dd2.png)
Problem 124: Error
Incorrect book solution results in life by two eyes.
![[Diagram]](../../diagrams/18/6779cd1b458402cc687191aef4aaa79d.png)
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
![[Diagram]](../../diagrams/30/fed0a65eb01c37adeef5d5a41c332856.png)
Problem 507: Error
Incorrect book solution results in ko.
![[Diagram]](../../diagrams/42/54bbb879f6bef2473dbf37cf7df94dec.png)
Problem 507: Corrected
makes two eyes.
![[Diagram]](../../diagrams/11/bc6b75e07c7314a1d92114502a6f5d37.png)
Problem 507: Corrected (ii)
Black lives unconditionally.
Problem 793
![[Diagram]](../../diagrams/9/3065ee84dede0eb17b28723c5e21c8ec.png)
Problem 793: Error
Incorrect book solution has Black losing additional points in the corner.
![[Diagram]](../../diagrams/47/769443633eaa34d57fe184bc7f4c53f4.png)
Problem 793: Corrected (i) 1~10
![[Diagram]](../../diagrams/14/ab6d5aa659cb57c254f000b0505986df.png)
Problem 793: Corrected (i) Continuation
Black gains extra points in the corner while still winning the capturing race.