Tesuji - the book / Errata

Page 82 Answer  

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

White Dead  

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?

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 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.

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

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