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Promote Chess960 to the main collection.
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Mark Cloak and Dagger as broken.
Add design journal.
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donkirkby committed Oct 24, 2023
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26 changes: 16 additions & 10 deletions README.md
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Expand Up @@ -16,18 +16,24 @@ introduction to the classic game. Players of different chess abilities that
might find a game of regular chess frustrating may enjoy exploring these games
together.

* [Zombie Chess] is a game where you bury each piece you capture under one of
your pieces. If you move off a buried piece, it comes back from the dead as
a zombie. (2 players, chess set, coins, pencils, and paper)
* [Masquerade Chess] is a combination of chess and deduction games like
Mastermind. Pieces move regularly, except when they capture. Start the
game by choosing which capture moves each of your opponent's pieces will
use, then try to deduce how each of your pieces can capture. (2 players,
chess set, pencils, and paper)
* [Zombie Chess][zombie-chess] is a game where you bury each piece you
capture under one of your pieces. If you move off a buried piece, it
comes back from the dead as a zombie. (2 players, chess set, coins,
pencils, and paper)
* [Masquerade Chess][masquerade-chess] is a combination of chess and
deduction games like Mastermind. Pieces move regularly, except when
they capture. Start the game by choosing which capture moves each of
your opponent's pieces will use, then try to deduce how each of your
pieces can capture. (2 players, chess set, pencils, and paper)
* [Chess960][chess960] is a game designed by Bobby Fischer to mix up
the game opening by randomly choosing your starting position. (2
players, chess set, and deck of cards)

[zombie-chess]: https://donkirkby.github.io/chess-kit/rules.html#zombie-chess
[masquerade-chess]: https://donkirkby.github.io/chess-kit/rules.html#masquerade-chess
[chess960]: https://donkirkby.github.io/chess-kit/rules.html#chess960

If you're brave, you can read about [experiments] in progress.


[Zombie Chess]: https://donkirkby.github.io/chess-kit/rules.html#zombie-chess
[Masquerade Chess]: https://donkirkby.github.io/chess-kit/rules.html#masquerade-chess
[experiments]: https://donkirkby.github.io/chess-kit/new_rules.html
30 changes: 19 additions & 11 deletions docs/index.md
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Expand Up @@ -19,17 +19,25 @@ introduction to the classic game. Players of different chess abilities that
might find a game of regular chess frustrating may enjoy exploring these games
together.

* [Zombie Chess] is a game where you bury each piece you capture under one of
your pieces. If you move off a buried piece, it comes back from the dead as
a zombie. (2 players, chess set, coins, pencils, and paper)
* [Masquerade Chess] is a combination of chess and deduction games like
Mastermind. Pieces move regularly, except when they capture. Start the
game by choosing which capture moves each of your opponent's pieces will
use, then try to deduce how each of your pieces can capture. (2 players,
chess set, pencils, and paper)
* [Zombie Chess][zombie-chess] is a game where you bury each piece you
capture under one of your pieces. If you move off a buried piece, it
comes back from the dead as a zombie. (2 players, chess set, coins,
pencils, and paper)
* [Masquerade Chess][masquerade-chess] is a combination of chess and
deduction games like Mastermind. Pieces move regularly, except when
they capture. Start the game by choosing which capture moves each of
your opponent's pieces will use, then try to deduce how each of your
pieces can capture. (2 players, chess set, pencils, and paper)
* [Chess960][chess960] is a game designed by Bobby Fischer to mix up
the game opening by randomly choosing your starting position. (2
players, chess set, and deck of cards)

If you're brave, you can read about [experiments] in progress.
[zombie-chess]: rules.md#zombie-chess
[masquerade-chess]: rules.md#masquerade-chess
[chess960]: rules.md#chess960

[Zombie Chess]: rules.md#zombie-chess
[Masquerade Chess]: rules.md#masquerade-chess
If you're interested, you can read my [design journal]. If you're brave, you can
read about [experiments] in progress.

[design journal]: journal/
[experiments]: new_rules.md
51 changes: 51 additions & 0 deletions docs/journal/index.md
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---
title: Journal
subtitle: How we got here
hero_image: ../images/index_hero.jpg
---
## 2007 - Minor Confusion
Originally, I played Robert Abbott's Confusion several times with Kerry
Handscomb, where you don't know which of your pieces can make which moves. We
loved the idea of having to deduce your own pieces' moves, but we were
frustrated that a lot of the game came down to luck: who happened to find their
most powerful pieces first.

We designed a version with fewer pieces that had more balanced power, and called
it Minor Confusion. We even discussed the idea with Robert Abbott himself, and
got his permission to include it in a book project that was never completed.
Minor Confusion was OK, but a bit dry. We eventually moved on to playing other
games.

### Nov 2022 - Masquerade Chess
15 years after Minor Confusion, I had the idea to give pieces different moves
when capturing. Standard chess pieces would move normally, except when they
capture, and you have to deduce their capture moves. You have to engage with
your opponent to learn anything, and that spreads the deduction over a longer
game.

### May 2023 - Zombie Chess
After several successful playtests, I started thinking about whether I could
make a version of Masquerade Chess to sell. It seemed silly to try and sell the
chess set, so I thought about making the accessories to add to a standard chess
set: a dry-erase screen to secretly record which pieces have which capture
moves.

It seemed like it would be easier to sell, if you could play more than one game
with it, so I tried to think of other chess variants with hidden information
that could use a dry-erase screen. I had the idea to secretly bury the captured
pieces on the board, and Zombie Chess was born.

### Jun 2023 - Chess Kit
After two successful ideas, I decided to turn them into another book project,
similar to [Donimoes], my collection of new domino games and puzzles. I came up
with eight ideas over a couple of weeks.

[Donimoes]: https://donkirkby.github.io/donimoes/

### Oct 2023 - Cooperative Chess
I had a successful playtest of Crowded House, and wrote up its rules, along with
Chess960. I spent the most time, though, testing Cooperative Chess as a
solitaire.

I also converted the scripts for publishing the Donimoes rules as PDF and
website to this project.
82 changes: 15 additions & 67 deletions docs/new_rules.md
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Expand Up @@ -12,13 +12,13 @@ know what you think.
* [Cloak and Dagger Chess][cloak-and-dagger-chess] is a game where you
disguise your chess pieces as checkers, then try to identify your
opponent's pieces. (2 players, chess set, checkers set, pen, and tape)
* [Chess960][chess960] is a game designed by Bobby Fischer to mix up
the game opening by randomly choosing your starting position. (2
players, chess set, and deck of cards)

[crowded-house]: #crowded-house
[cloak-and-dagger-chess]: #cloak-and-dagger-chess
[chess960]: #chess960

# New Games
These games are in early development or playtesting. The rules might get more
filled out or change based on feedback from players.

## Crowded House
Two teams of two play, with each player moving the pieces of their colour
Expand Down Expand Up @@ -62,6 +62,11 @@ a team runs out of time, they can add 2 minutes for each coin in their pile and
put their pile back in the centre. Once a team pays a coin, they can discuss as
much as they want until they make a move.

# Broken Games
These ideas seemed promising, but didn't work at the table. Maybe I'll come back
to them, if I get inspired. Masquerade Chess seemed broken for 15 years, before
I had the idea to hide only the capture moves.

## Cloak and Dagger Chess
Pawns are played as usual, but all other pieces are replaced by numbered
checkers. Players have to deduce which of their opponent's pieces are which, and
Expand Down Expand Up @@ -115,69 +120,12 @@ chess. All spaces between their start position and their end position must be
empty, except for the king and the castling rook. All spaces between the king's
start and end positions must not be under attack, if the king is uncloaked.

## Chess960
This is probably the least silly game in the collection; people organize
Chess960 tournaments! It's still a bit silly, because it takes away the standard
"opening book". One of the challenges to learning chess is that strong players
have spent a lot of time studying standard openings. That can also make the
early game feel like you're following a script. Randomizing the starting
position should make the standard openings much less important and make the play
feel more creative.

### Starting Position
The idea of randomizing the starting position has been around since the 1790s,
but Bobby Fischer added some restrictions in the 1990s to avoid positions that
strongly advantage one player:

* Pawns start in their regular position.
* The two bishops must be on different colours.
* The king must be between the two rooks.
* As in the standard starting position, black's pieces are a mirror reflection
of white's.

With those restrictions, there are 960 possible starting positions. You can
generate a random number and look up the position in a table, or use a website
like [mark-weeks.com][weeks] to generate a position. You can also generate a
random starting position with a standard deck of playing cards. Create three
piles of cards with the following ranks, ignoring suit:

* A, 3, 5, 7
* 2, 4, 6, 8
* 8, 8, 10, 10, 10, Q

Shuffle each of the piles separately, then turn over one card from each of the
first two piles. Using the ace through 8 to represent the squares a1 through h1,
place the two white bishops on the squares that match the two cards. Confirm
that they are on opposite-coloured squares. Now turn over one card at a time
from the last pile, and use the identified white pieces to fill in the empty
squares from left to right. Place a knight for an 8, a queen for a queen, and a
rook or king for a 10. Place a rook for the first and third 10, and a king for
the middle 10. Finally, place the pawns in their regular positions and place the
black pieces to mirror the white pieces.

As an example, imagine you turned over an ace and a 6 from the first two piles,
then 8, 10, Q, 10, 8, 10 from the third pile. The starting position would look
like this:

![Diagram](images/new_rules/diagram4.png)

### Castling
The other change that Bobby Fischer made was to the castling rules. As usual,
the king may castle with the rook to his right or his left. However, the two
pieces' end positions after castling are the same as for standard chess. So to
castle with the h-side rook, white's king would end on g1 and the rook on f1, no
matter where they started. As in regular chess, there are several restrictions
before you can castle:

* The king and the rook must not have moved.
* The king's starting square, ending square, and all the squares he moves
through must not be under attack.
* All the squares the two pieces move through must be empty, except for the two
pieces themselves.

The rest of the standard chess rules apply unchanged.

[weeks]: https://www.mark-weeks.com/cfaa/chess960/c960strt.htm
### Design Problems
Because you don't know how your opponent's pieces capture, you never know if
you're safe. You're not even safe from the pawns, because your opponent can
sometimes make two pawn moves.

Maybe it's too similar to Masquerade Chess to begin with.

[![cc-logo]][cc-by-sa]

Expand Down
80 changes: 79 additions & 1 deletion docs/rules.md
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Expand Up @@ -30,9 +30,13 @@ together.
they capture. Start the game by choosing which capture moves each of
your opponent's pieces will use, then try to deduce how each of your
pieces can capture. (2 players, chess set, pencils, and paper)
* [Chess960][chess960] is a game designed by Bobby Fischer to mix up
the game opening by randomly choosing your starting position. (2
players, chess set, and deck of cards)

[zombie-chess]: #zombie-chess
[masquerade-chess]: #masquerade-chess
[chess960]: #chess960

## Zombie Chess
Just because you've captured a piece doesn't mean you can stop worrying about
Expand Down Expand Up @@ -193,11 +197,85 @@ themselves. Move fast and break things!
### History
This game was inspired by Robert Abbott's Confusion, which Kerry Handscomb and
I originally adapted as Minor Confusion by creating a more balanced set of moves
and playing with a chess set. That was playable, but uninspiring, so I abandoned
and playing with a chess set. That was playable but uninspiring, so I abandoned
it for 15 years. Masquerade Chess returns to the standard Chess moves, and
players only learn about their pieces during capture, which slows the pace of
the game.

## Chess960
This is probably the least silly game in the collection; people organize
Chess960 tournaments! It's still a bit silly, because it takes away the standard
"opening book". One of the challenges to learning chess is that strong players
have spent a lot of time studying standard openings. That can also make the
early game feel like you're following a script. Randomizing the starting
position should make the standard openings much less important and make the play
feel more creative.

### Starting Position
The idea of randomizing the starting position has been around since the 1790s,
but Bobby Fischer added some restrictions in the 1990s to avoid positions that
strongly advantage one player:

* Pawns start in their regular position.
* The two bishops must be on different colours.
* The king must be between the two rooks.
* As in the standard starting position, black's pieces are a mirror reflection
of white's.

With those restrictions, there are 960 possible starting positions. You can
generate a random number and look up the position in a table, or use a website
like [mark-weeks.com][weeks] to generate a position. You can also generate a
random starting position with a standard deck of playing cards. Create three
piles of cards with the following ranks, ignoring suit:

* A, 3, 5, 7
* 2, 4, 6, 8
* 8, 8, 10, 10, 10, Q

Shuffle each of the piles separately, then turn over one card from each of the
first two piles. Using the ace through 8 to represent the squares a1 through h1,
place the two white bishops on the squares that match the two cards. Confirm
that they are on opposite-coloured squares. Now turn over one card at a time
from the last pile, and use the identified white pieces to fill in the empty
squares from left to right. Place a knight for an 8, a queen for a queen, and a
rook or king for a 10. Place a rook for the first and third 10, and a king for
the middle 10. Finally, place the pawns in their regular positions and place the
black pieces to mirror the white pieces.

As an example, imagine you turned over an ace and a 6 from the first two piles,
then 8, 10, Q, 10, 8, 10 from the third pile. The starting position would look
like this:

![Diagram](images/rules/diagram6.png)

### Castling
The other change that Bobby Fischer made was to the castling rules. As usual,
the king may castle with the rook to his right or his left. However, the two
pieces' end positions after castling are the same as for standard chess. So to
castle with the h-side rook, white's king would end on g1 and the rook on f1, no
matter where they started. As in regular chess, there are several restrictions
before you can castle:

* The king and the rook must not have moved.
* The king's starting square, ending square, and all the squares he moves
through must not be under attack.
* All the squares the two pieces move through must be empty, except for the two
pieces themselves.

The rest of the standard chess rules apply unchanged.

[weeks]: https://www.mark-weeks.com/cfaa/chess960/c960strt.htm

### Contributing
Know some other silly chess variants? Ideas to share? Get in touch at
[https://donkirkby.github.io/chess-kit][github].

Masquerade Chess and Zombie Chess are original games designed by
[Don Kirkby][don].

[github]: https://donkirkby.github.io/chess-kit
[don]: https://donkirkby.github.io/

[![cc-logo]][cc-by-sa]

[cc-logo]: images/cc-by-sa.png
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