# How does White survive in this corner?

This is from a game between two high-ranking professionals I saw on TV. Hopefully I copied it right.

There doesn't quite seem to be enough from after W1. Let me show you [1]:

``````\$\$Wc
\$\$ . . . . . . . . . . |
\$\$ . . . X . . . . . . |
\$\$ . O X . X . . . 1 . |
\$\$ . . . . . . X . X . |
\$\$ . . . . . . . X X . |
\$\$ . X . . X X X O X O |
\$\$ . . . X O O O O O O |
\$\$ . . . . X . . . X . |
\$\$ --------------------|
``````

If Black moves first, perhaps there's not enough from after B2 and W3 ?

``````\$\$Wc
\$\$ . . . . . . . . . . |
\$\$ . . . X . . . . . . |
\$\$ . O X . X . . . O . |
\$\$ . . . . . . X . X . |
\$\$ . . . . . . . X X . |
\$\$ . X . 3 X X X O X O |
\$\$ . . . X O O O O O O |
\$\$ . . . . X 2 . . X . |
\$\$ --------------------|
``````

If White has just a little bit more time, we can put a white stone at A. Not even.

``````\$\$c
\$\$ . . . . . . . . . . |
\$\$ . . . X . . . . . . |
\$\$ . O X . X . . . O . |
\$\$ . . . . . . X . X . |
\$\$ . . . . . . . X X . |
\$\$ . X . . X X X O X O |
\$\$ . . . X O O O O O O |
\$\$ . . . . X 2 . . X . |
\$\$ --------------------|
``````

So what are they thinking?

• You say a White stone at A, but you have not marked A; perhaps you mean 2? – PJTraill Mar 15 '18 at 12:20
• P.S. If you meant A15, perhaps you should add a `c` to your diagram headers to show the coördinates. It would also be interesting to know what happened next in the game – or was it just a snippet on a random news item? Anyway, like you, I have difficulty understanding what is going on. Maybe 1 makes a ko threat, but I do not know if that is relevant. The entire position (in the linked image) looks fairly complicated. – PJTraill Mar 15 '18 at 12:39
• @PJTraill as far as I can tell... White is dead. and maybe it's trying to put in some aji... would you like me to link you to the video?? [ here ] – john mangual Mar 15 '18 at 15:33
• It would indeed be worth linking to the video in your question. I see there that the B stone at Q5 was played after W 1. There is also a ko-fight going on at 12x{I,J}, so moves may be ko-threats; after Q5, White connects the ko, so he has ignored a Black threat. At 1:26:40 W apparently resigns during a countdown; this can also mean that previous moves were setting the scene for resignation: see my question What is looking for a place to resign in go? and senseis.xmp.net/?HowToResign. – PJTraill Mar 15 '18 at 17:40
• Having added coördinates to your diagrams, I realise that I wrote A15 when I meant P1! – PJTraill Mar 15 '18 at 21:51

To answer the original question: White's corner is unconditionally dead, it cannot be rescued even with White playing first. The points `P1` and `R1` are miai, when White takes one of them Black takes the other.