jann wrote:
About translation, IIRC the current one is not bad as a translation (Davies), but was probably aimed at players not theorists. So instead of expecting rigid definitions of all details you need to use both common go sense and common English sense (similarly to the original Japanese likely).
That is a good point Jann. We have to try to use common go sense to resolve difficult positions. Let's try. Assume a game stops in a position where playing a confirmation phase may be very difficult (look as the stupid example (sorry Cassandra) showed in
https://lifein19x19.com/viewtopic.php?p=265943#p265943. That means that by playing this confirmation phase both players may very easily makes mistakes.
To simplify the discussion let's simulate such difficulties on a trivial example with trivial mistakes.
- Click Here To Show Diagram Code
[go]$$W Confirmation phase
$$ -------------
$$ | . . . X O |
$$ | X X X X O |
$$ | O O O O O |
$$ | . . . . . |
$$ | . . . . . |
$$ -------------[/go]
We are in the confirmation phases (both players have passed and nobobody request a resumption of the game).
white : black stones are dead
black : I am not convinced so, please start a confirmation phase and prove I am not alive
white : OK
and it follows the sequence (with two mistakes)
- Click Here To Show Diagram Code
[go]$$W Confirmation phase
$$ -------------
$$ | 1 3 2 X O |
$$ | X X X X O |
$$ | O O O O O |
$$ | . . . . . |
$$ | . . . . . |
$$ -------------[/go]
black: OK I am not alive with this sequence but may be I made a mistake. Because it is up to you to prove black is not alive I consider I can have another chance to try to live
here the second sequence
- Click Here To Show Diagram Code
[go]$$W Confirmation phase
$$ -------------
$$ | 1 2 . X O |
$$ | X X X X O |
$$ | O O O O O |
$$ | . . . . . |
$$ | . . . . . |
$$ -------------[/go]
white : well you are alive but maybe I made also a mistake
black : yes OC, but you claimed black stones were dead and I ask you to prove and explain that point. If you fail that means that you are not really in a position to prove black stones are not alive => black stones are alive.
IOW : who is in charge of the proof? The attacker or the defender?
Maybe we can say both but in that case that could lead to endless discussions.
My preference is to say that the attacker is in charge of the proof. In that case, during the analysis, the attacker is not allowed to change one of her move while the defender is allowed to try several moves.
One idea to solve the problem.
The attacker starts the confirmation phase
Each player must play in say 30"
At each time the defender may change one of her move and resume the game but the number of changes is limited to say 3.
That way any player (even beginners) may give a result for their game within an acceptable time.