Invalid castling in Fischer Random about lila HOT 4 OPEN

Just to add:

This is not possible in Chess960 games or analysis on Lichess, but apparently the 960 rules were not checked at all in this broadcast chapter.

Only the standard castling rules applied, so illegal 960 castling was possible on many other moves and also for White.

One observation was that there was no Chess960 or From Position tag in the PGN (instead it said Standard after copying the PGN).

Adding the same source link to another test broadcast correctly added the Chess960 tag and disallowed illegal castling.

The only difference I saw was that in the official broadcast (where the above game is from) the source was added early (certainly missing the FEN tag, possibly the Fischerandom Variant tag as well), while adding the source to a broadcast now includes these tags.

So I have reset the round in the official broadcast and it added the Chess960 tag, thus illegal castling is no longer possible. It seems like the Standard Variant tag added earlier wasn't overwritten for some reason without a reset.

from lila.

PGNs from today's broadcast to confirm above observation: the FEN tag is added to our PGN after it was added to the source, but the Variant tag isn't updated after it was added to the source, only a manual round reset or deleting the chapters so they get added again, fix this.

Source when first polled (no FEN, no Variant)

Lichess when first polled (no FEN + Variant Standard)

Source after games started (FEN + Variant Fischerandom)

Lichess after games started (FEN + Variant Standard)

Lichess after reset (FEN + Variant Chess960)

from lila.

Related FIDE rule in the 2018 handbook, highlighting by me (I could not find this section in the current version):

II.3.2.7.4
All the squares between the king's initial and final squares (including the final square) and all the squares between the rook's initial and final squares (including the final square) must be vacant except for the king and castling rook.

from lila.

Another question is, if black can, in above game after 13...Qd7 14.b3, castle long by moving the c8 rook to d8 and the b8 king to c8. Rule II.3.2.1 in the FIDE handbook mentions double move castling, but doesn't mention if the king has to jump over the rook.

Edit: I have just sent a mail to FIDE asking for clarification.

from lila.