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Thanks for the kind reply!

The rule that a Pawn dropped on 2nd rank regains his double push makes it a case of location-dependent moving, rather than an initial move. Position-dependent moving is not directly supported by the Interactive Diagram, but if can be emulated through automatic promotion: define multiple piece types for the piece with the variable move (all using the same symbol), and automatically 'promote' any of these types to the type that has the move belonging to the square they land on. This can be done by a user-supplied JavaScript function WeirdPromotion(). I did that in the Diagram I recently made for The Consuls.

In this case you would need two Pawn types, where only type 2 has the double push (and only type 1 promotes according to the normal mechanism on reaching the zone). Type 2 would always change into type 1 when it moves; both types would change into type 1 or 2 when they are dropped, depending on where they are dropped.

To make the promotion choice dependent on other pieces present on the board is problematic. The function WeirdPromotion() can also be used to veto promotions that would otherwise be possible. But the Diagram currently doesn't keep track of how many pieces of each type there are on the board. So it would have to scan the entire board to detect whether the proposed promotion piece is already there. This is possible, but would slow down the AI a lot. (But the AI currently cannoot handle games with drops anyway, so perhaps this is not a problem.)

Nelson // Thank you very much !!

(´ ˘ `)

Pawns, unlike other pieces, can be promoted over and over again. The reason is to strengthen the Pawn's advance.

Pawns can be dropped at 1st rank, so they can defend more actively. (For example, like Shogi's Anaguma, you can move the King into a corner and surround it with Pawns.)

However, the Pawn's attack power is relatively weak. Compared to other promoted pieces, Pawn has a lot of limited movement, and I thought it needed appropriate compensation. That's unlimited promotions.

As the saying goes, 'Pawns are the soul of chess', I felt that Pawns needed a unique feature.

H.G. //

Rule to advance 2 squares when moving to 2nd rank after a Pawn is dropped in 1st rank

Rule with restrictions on promotion (e.g., among the promoted pieces, only one piece with the same movement can exist on the board)

etc ?

A very well thought and pleasing out blend of a Capablanca's Chess and Shogi. I am curious about the rule against having identical promoted pieces other than promoted Pawns. I consider it a small wart on a otherwise perfect design.

I have no idea what you are asking. What rules?

Thank you !!

But can't some rules be implemented in an interactive diagram?

I added its code to the end of your Setup section. You can decide how you want to incorporate it into your page.

Is there any way I can attach this simulator to this page?

8ㅅ8...

Most of the rules have been fixed !

ah 'can promote' -> 'may promote'

Only Pawns must be promoted on the 10th rank. All pieces except pawns can choose whether to promote on the 9th or 10th rank.

CAN promote on 9th or MUST promote on 9th?

Rule changed !

May promote only on the 10th rank

->

May promote not only the 10th rank but also the 9th rank

Greg, Fergus // Really thank you !

I can't upload images to the page. What is the reason?

For some reason, the group write bit for the directory was off. This matters, because I recently changed the owner of everything to chessvariants, but php runs as apache. I checked the script, and it does "chmod 0775" on a new directory. So, I don't know how it happened. I tested one of my own directories with the same problem. After turning the group write bit on, I was able to upload files to it. I also tested a file with the same name as the one you tried to upload. It uploaded as 001.png, because the Korean characters were ignored. So, you should avoid using Korean letters in file names.

Based on the error, it looks like the name of the file begins with a space, which is probably not allowed. I would try renaming the file.

Upload of /home/chessvariants/public_html/membergraphics/MSpandemonium/ 현재001.png was allowed but failed! The cause of failure is unknown.

I can't upload images to the page. What is the reason?

I have corrected the wrong description!

[Rook, Bishop, and Knight have additional King's move when promoted. Marshal and Cardinal become the same as Queen when promoted. King and Queen are pieces that are not promoted.]

->

[Rook, Bishop, and Knight have additional King's move when promoted. Pawn, Marshal and Cardinal become the same as Queen when promoted. King and Queen are pieces that are not promoted.]

You can play Pandemonium on vchess!

https://vchess.club/#/variants/Pandemonium

[Changed points]

1. Castling is only possible once. And if Rook moves or is captured, casting is impossible in that direction, and if King moves, casting is impossible at all.

2. Now the two Kings can face each other. That is, it is okay if King and King are in the same file or rank, and there is no piece between them.

3. If a player can no longer move or drop a piece, the game is a draw.

Jean //

I'll fix the grammatical errors later!

In Pandemonium, dropped or moved pawns can also move more than 2 spaces. If the pawn can move more than 2 spaces even though it has been moved, then also King and Rook think it should be possible to castling even if it has moved as well.

The reason why Marshal's promotion name and Cardinal's promotion name were not set to Queen is that it can be confused with the original Queen.

Daphne, I don't know if you prefer communicate (in PM?) with another language, I speak Fr, Sp, It. What I mean is that your rules of castling seems to apply equally for King and Jade. If yes, then you could simply write King/Jade because as it is written, it is confusing.

My English is not very good either, but "to be castle" is not correct.

The rules of castling in chess are complex but they are less complex if one understands the history. Castling should be the 1st move of the King and the concerned Rook. It is a kind of dogma. Now, we are talking "variants" so you can decide what you want. Personally I like the idea that the player forfeits his right of castle if he moves the piece. But it's up to you.

Why do you need to have another names like Apricot and Whole (why these strange names?) for something which is exactly the Queen. Why not simply saying "Queen"?

Jean-Louis // Thank you!

1. The two King pieces are separated into Jade and King. I followed it. Therefore, it was necessary to explain Castling differently.

2. And, in Chess without Drop, BN (Cardinal) and RN (Marshal) are less valuable than Queen. So it reflected being promoted to Queen. Anyway, promotion is optional. There is no reason to promote BN or RN to Queen unless you want to. And in Shogi, all minor pieces are promoted to Gold. With this in mind, BN and RN were also promoted to Queen(a piece of the same status as Gold in Shogi).

3. Now castling is also possible with a moved or dropped Rook. Likewise, you can castling with a moved King. Of course, the King and Rook needed for Castling should be at the starting point. A dropped or moved pawn can move more than 2 squares, but I think it's strange that casting is impossible if the Rook and KIng are dropped or moved. So in Pandemonium, castling was modified to be possible multiple times. What do you all think about this?

(Because my English is not good, I rely heavily on Translate google. Therefore, there will be a lot of awkward parts in the sentence and there will be parts that you don't understand. If you have such a part, please tell me!)

Kevin // Thank you so much for the comments!! 8ㅅ8