Ratings & Comments

Trapped in a prison by Jaycar10

Wait.

The interactive diagram works on Edge, but Firefox is complaining it "Cannot make a diagram with 0 pieces on an 16x16 board!"

To make it easier to keep track of which pages have Interactive Diagrams, I have been going through this list tagging each page with the tag Interactive Diagram.

Since the main thing that was slowing me down on this was moving diagrams from comments to pages, I created a new tag called Interactive Diagram: In Comment and proceeded to tag each page listed here with one tag or the other. I made it a child tag so that the two tags will link to each other through having a parent/child relationship. With these two tags made, we can retire or deprecate this page and start using tags to keep track of which pages have interactive diagrams.

you are right that "(back 2 cells of middle 2 files)" should read "(back 3 cells of middle 3 files)". Feel free to correct it.

Indeed, in combination with the tags this is a very good solution!

Okay, I have changed the link on the homepage to the Interactive Diagram tag page. Should any information from this page be migrated to it?

Great that this piece of work is finally out! I have waited for it for more than a decade ...

There is a small question: Why did you rename the "Teutonic Knight" to "Eutonic Knight"? Is there a specific reason for that, or is it a typo (typical cut-and-paste error)?

I nominate the game Jetan by Edgar Rice Burroghs, https://www.chessvariants.com/other.dir/jetan.html

It is tagged "groundbreaking" and I totally agree with this tagging.

I'm guessing that ":" means "eyes" and ")" means "mouth", but what is "!"?
Beard?
Edit: Actually, I suspected it was a normal exclamation point, but I didn't understand why you were smiling.

Jörg Knappen, hi, thanks for your info.

Alright, I'll put the date 2001 to "Seeping Switchers" army, and omg, I'm so sorry for the "Teutonic Knight" error, not sure how that happened!!

I'll do a 'major' update soon and fix it all up!!

If you remember the Joker does not imitate fully "special" pieces. So it does not promote, nor castle, etc. . This feature helps with that too.

Antarctic Warfare - Cardinal Islands by Phan Anh Khoa, AKA Ancient Space Aliens (well-spent hours), Ancient Space Crabs, alias Vegerable's Tyranny, Vegetable's Tyranny

Since I've been finding 522 errors for images generated with fen2.php in the PHP error log, I made some changes to how caching works in Cloudflare. It had been set to not cache anything with a query string. I changed this to standard, which separately caches each unique query string. Then I made some cache rules. I have five cache rules right now. These are:

1. Bypass cache for Jocly
2. Bypass cache for nocache in query string
3. Cache PHP scripts that generate images
4. Cache HTML when cvpuser cookie is absent
5. Bypass cache for other PHP scripts

Since the cache rules do not mention anything about applying only one rule or about the order in which they are applied, the third rule and the last rule explicitly mention showpiece.php, fen2.php, drawdiagram.php, and marker.php.

On Kaiserspiel (Emperor's game), Sultanspiel (Sultan's game), Peguilhen and L. Tressan:

Kaiserspiel was clearly described in 1819 and attributed to some Peguilhen. It contains the Amazon (named Feldherr in original German, English translations include General and Commander. Probably the more clumsy "Commander in Chief" is a better translation. It also contains the Bishop-Knight piece under the name Adjutant. L. Tressan republished this game with slight amendments but did not change the pieces and their names. The addition of the Rook-Knight piece named Admiral than was pondered, but discarded because of the unusual board size needed (11x11)

Sultanspiel (Sultan's game) was first published by L. Tressan in 1840 and it contains the Rook-Knight piece in addition to the pieces known from Kaiserspiel. The piece is named Marschall (Marshal) there.

Now to the more difficult part: Virtually nothing is known about the person L. Tressan. It appears in a Chess book bibliography by Oettinger under the name "Ludwig Tressau", but I think that the given name is just an extrapolation from the initial by the bibliographer, and that the last letter is plain wrong, it should be an n, not a u (from inspecting the title page of the scanned book, I read clearly a Fraktur n at the end of the name; Google also reads L. Tressan). We do not even know if L. Tressan was male or female, their consistent hiding behind an abbreviation makes me think of a woman named Louise or Luise.

Suggestions for edits:

Correct all appearances of Ludwig Tressan to L. Tressan; try to avoid pronouns for L. Tressan (repeat the name, use the article "the" in place of "his", or use singular they)

Disentagle Emperor's Game (attributed to Peguilhen, ca. 1815) and Sultan's game (attributed to L. Tressan, 1840).

In the description of Marshall, you can add at your discretion the factoid that Peguilhen (1815) pondered about a game including this piece under the name "Admiral" but discarded that idea.

P.S. You may find the following article, also including Hyderabad Decimal Chess, interesting: https://sciendo.com/article/10.2478/bgs-2022-0017 (The author, Georgi Markov, goes for Ludwig Tressau what I consider an error be Oettinger)