A question for chess engins´ authors

[Slobodan R. Stojanovic]

Geschrieben von:/Posted by: Slobodan R. Stojanovic at 13 June 2004 23:53:42:

Hi all,
I descovered today some subtle details about the 3-fold repetition rule.
It is not enough simply to repeat the position 3 times to be able to claim draw. There are more additional conditions:
a) the same player must have his turn to move
b) all pieces must have the same posibilities to move as they had in two previous repetitions.
If someone don´t understand what I mean, I would illustrate this with examples.
Do you think those examples are necessary?

Regards from SL (apprentice from a web site of one Serbian IM player)

[Matthias Gemuh]

Geschrieben von:/Posted by: Matthias Gemuh at 14 June 2004 00:10:29:
Als Antwort auf:/In reply to: A question for chess engins´ authors geschrieben von:/posted by: Slobodan R. Stojanovic at 13 June 2004 23:53:42:

Hi all,
I descovered today some subtle details about the 3-fold repetition rule.
It is not enough simply to repeat the position 3 times to be able to claim draw. There are more additional conditions:
a) the same player must have his turn to move
b) all pieces must have the same posibilities to move as they had in two previous repetitions.
If someone don´t understand what I mean, I would illustrate this with examples.
Do you think those examples are necessary?

Regards from SL (apprentice from a web site of one Serbian IM player)

If (b) is not about castling rights and en passant, then I really need
some examples.
/Matthias.


BigLion + Taktix

[Slobodan R. Stojanovic]

Geschrieben von:/Posted by: Slobodan R. Stojanovic at 14 June 2004 12:25:17:
Als Antwort auf:/In reply to: Re: A question for chess engins´ authors geschrieben von:/posted by: Matthias Gemuh at 14 June 2004 00:10:29:

Hi all,
I descovered today some subtle details about the 3-fold repetition rule.
It is not enough simply to repeat the position 3 times to be able to claim draw. There are more additional conditions:
a) the same player must have his turn to move
b) all pieces must have the same posibilities to move as they had in two previous repetitions.
If someone don´t understand what I mean, I would illustrate this with examples.
Do you think those examples are necessary?

Regards from SL (apprentice from a web site of one Serbian IM player)

If (b) is not about castling rights and en passant, then I really need
some examples.
/Matthias.

Then, you don´t need them.
SL.