# Tesuji - the book / Errata

Sub-page of TesujiTheBook

Please also have a look onto the discussion page for problems that are no erratum.

### Problem 3 on page 81 & 82

About the problem, "White to play and win for sure.":

The given solution (or problem) seems wrong. It was discussed on rec.games.go

Problem taken from third printing, not changed in later printings.

In the first printing something may have been slightly different.

What is the collective wisdom here? Incorrect solution? Wrong problem diagram? Combination?

Problem #3, Page 81 White to Play and Win

Quote: White 1 is the safety play -- empty triangles are not always wrong.

White Dead via 3 in a row

White suffers from a double shortage of liberties and therefore is dead.

Herman Hiddema: If you amend the problem like this, the given solution works:

suggested amendment

But the 1st printing of the Ishi Press edition has this as the original problem (extra black and white stone stretching up). This will work with the suggested solution (except the published solution seems still missing these extra stones), no?

Original Problem #3, Page 81 White to Play and Win

### Problem 3, page 152

If white plays 4 at 5, she either has a ko to escape or links up with the white side, unless I have missed something.

Potential ko-escape for white?

p143 Swap diagrams 5 and 6 to cause them to match the numbering in the answers.

### Problem 1 on page 26, sixth printing

Problematic variation

There is a lot of scope for fighting and a great deal of complication in this move. It seems that black cannot kill white. (In the fifth printing, May 1995, the position of the surrounding stones is different and colours are reversed, but the technique is the same. The text has a comment "[Black] can save his cutting stones if he plays a certain way, but White can get a good result anyhow". The solution contains a variation for at a, but no discussion of the in this diagram.) A more complicated variation:

| . . . . . . . . .

Why not continue like this?:

There is a lot of scope for fighting and a great deal of complication in this move. It seems that black cannot kill white. A more complicated variation:

Continuation
Continuation 2

Ko.

Black can play 5 at the spot above, but then the corner will become seki or ko:

Variation

Either way, B does not appear to have unconditionally captured the cutting stones.

vital point?

ThorAvaTahr: If you connect like this it seems to me that black wins the semiai with one liberty.

continuation
white can connect simply. Black 7 at 8 is not fast enough.

In ThorAvaTahr's diagram, white seems to have played sub-optimally.

seki

Tesuji - the book / Errata last edited by xela on January 1, 2024 - 08:39