#227 Bug find duplicates with Scid 5.0.2

[Jonathan]

I check this pgn file for duplicates with these settings https://imgur.com/a/lT8zvoo

Scid find the games which are not duplicates in anyway.
https://imgur.com/a/igB66pD
https://imgur.com/a/OW3EewY

These are just some examples, you can check for yourself, I have included the pgn.
With Scid 4.7 I don't get these errors when searching for duplicates.

[Jonathan]

I just did a test and I have the same problem when searching for duplicates with Scid 4.7

[Jonathan]

Can it be fixed for future updates please?

On Thu, Feb 29, 2024 at 7:46 AM Steven stevenaaus@users.sourceforge.net
wrote:

Hmmm. ScidvsPC behaves the same. Probably the cause is
that the movelists are not actually compared.

// Furthermore, the moves of one game should, after truncating, be the
// same as the moves of the other game, for them to be duplicates.
// We do not check this, but do check that their home pawn change
// lists are the same (for the length of the shorter change list) which
// is an approximation but is much faster to check.

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[bugs:#227] https://sourceforge.net/p/scid/bugs/227/ Bug find
duplicates with Scid 5.0.2

Status: open
Group: v.5.0
Created: Sat Feb 24, 2024 08:21 PM UTC by Jonathan
Last Updated: Sat Feb 24, 2024 08:26 PM UTC
Owner: nobody
Attachments:

• Hans_Nieman_white_minmoves2_mainlines.pgn
  https://sourceforge.net/p/scid/bugs/227/attachment/Hans_Nieman_white_minmoves2_mainlines.pgn
  (131.9 kB; application/octet-stream)

I check this pgn file for duplicates with these settings
https://imgur.com/a/lT8zvoo

Scid find the games which are not duplicates in anyway.
https://imgur.com/a/igB66pD
https://imgur.com/a/OW3EewY

These are just some examples, you can check for yourself, I have included
the pgn.
With Scid 4.7 I don't get these errors when searching for duplicates.

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[Bahman Movaqar]

Using your values for twin checking, Scid explicitly warns about potentially non-twin games being marked as such.

Your settings for finding twin games are potentially likely to cause non-twin games with similar moves to be marked as twins.
It is recommended that you specify "Yes" for at least two of the "same site", "same round" and "same year" settings.