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# The Tower Game

The Tower Game is an idea I had a long while ago, while trying to create an almost perfect expansion of two-dimensional Chess to the three-dimensional world. It is based on similar concepts to Graeme C Neatham's in Fool's Hexagonal Chess. The game is, shortly put, a simplified version of Gavin Smith's Prince. It uses the same pieces names and movements as that game.

## Setup

```The board is 5 x 5 x 8 (200 cubes, or cells.) Every one of the 5x5 levels is called a 'rank', and every one of the 25 columns is called a 'file'. Ranks are numbered, as usual, from 1 to 8; and files are named by their position in the 5x5 matrix with two letters. For example, the white King start in cc1. The cubes ac2 and ca2 are DIFFERENT cubes. (You might just as well capitalize one of two letters.

There are TWO possible starting setups :

---

1. The Original setup :

White's first rank is as follows,Ac

+---+---+---+---+---+
e  |.R.|;N;|.B.|;B;|.R.|
+---+---+---+---+---+
d  |:C:| C |:B:| B |:N:|
+---+---+---+---+---+
c  |.C.|;C;|.K.|;J;|.J.|
+---+---+---+---+---+
b  |:N:| M |:M:| J |:J:|
+---+---+---+---+---+
a  |.R.|;M;|.M.|;N;|.R.|
+---+---+---+---+---+
a   b   c   d   e

From left to right, top to bottom, they go as follows:

e: Rook,    Knight,   Bishop,   Bishop, Rook,
d: Captain, Captain,  Bishop,   Bishop, Knight,
c: Captain, Captain,  KING,     Jester, Jester,
b: Knight,  Merchant, Merchant, Jester, Jester,
a: Rook,    Merchant, Merchant, Knight, Rook.
a        b         c         d       e

Black's setup mirrors white, but Bishops face Merchants and Merchants face Bishops.

---

2. The Alternate setup :

White's first rank is as follows,

+---+---+---+---+---+
e  |.R.|;N;|.B.|;M;|.R.|
+---+---+---+---+---+
d  |:B:| M |:J:| C |:N:|
+---+---+---+---+---+
c  |.J.|;C;|.K.|;B;|.M.|
+---+---+---+---+---+
b  |:N:| B |:M:| J |:C:|
+---+---+---+---+---+
a  |.R.|;J;|.C.|;N;|.R.|
+---+---+---+---+---+
a   b   c   d   e

e: Rook,    Knight,    Bishop,   Merchant, Rook,
d: Bishop,  Merchant,  Jester,   Captain,  Knight,
c: Jester,  Captain,   KING,     Bishop,   Merchant,
b: Knight,  Bishop,    Merchant, Jester,   Captain,
a: Rook,    Jester,       Captain,  Knight,   Rook.
a        b          c         d         e

Black's setup mirror's white. In this arrangement, all pawns are protected at least once.

---

The Rook in the bottom right is said to be in the cube ea1. The Rook in the top left is in cube ae1.

In both setups, there is pawn in front of every piece.

This make the set, for the player, as follows :

* 4  Rooks     (R)
* 4  Bishops   (B)
* 4  Merchants (M)

* 4  Knights   (N)
* 4  Captains  (C)
* 4  Jesters   (J) (Formerly Aces)

* 1  King      (K)
* 25 Pawns     (-)

The piece density of the board is 50%. Like in standard chess.

Note : the symbols around the pieces in the diagrams symbolize the Merchants binding. Since only one rank is shown, they also symbolize the Bishops binding.```

## Pieces

To describe the movements of the pieces, I have to define three major directions in the 3D board. (Totalling 26 single directions.) * Orthogonal : That is, moving towards one of the simple directions (totalling six): North(N), South(S), East(E), West(W), Up(U), and Down(D). * Diagonal : That is, moving towards one of the double compound directions (totalling twelve): NE, NW, NU, ND, SE, SW, SU, SD, WU, WD, EU, and ED. * Triagonal : That is, moving towards one of the triple compound directions (totalling eight): NEU, NED, NWU, NWD, SEU, SED, SWU, and SWD. -- EDIT 28-6-2007 : Beginner's Guide To Space Chess. This page has diagrams for all those pieces. It calls the Merchant, the Mage. And it calls the Ace, the Jester. I don't like the name Mage, but I like the name Jester, so I changed it throughout the article. -- The pieces in this game are : * The Rook, an orthogonal rider. * The Bishop, a diagonal rider. A Bishop is restricted to half of the board. * The Merchant, a triagonal rider. A Merchant is restricted to, more or less, a quarter of the board (see notes.) * The Knight, a leaper, moves one step orthogonally then one step diagonally. * The Captain, a leaper, moves one step orthogonally then one step triagonally. One is restricted to half of the board. * The Jester, a leaper, moves one step diagonally then one step triagonally. * The King, the royal piece, moves one step in any of the 26 direction. - Castling is done by moving the King to one of the corner cubes and putting the Rook in the cube the King has passed. Normal restrictions apply. * The Pawn, moves without capturing one step orthogonally forward (towards the enemy side.) It moves to capture one step diagonally or triagonally forward. - A Pawn may make a double step in its first move and may be captured en-passant. - Pawns promote upon reaching their eighth rank to any piece in the starting setup, or a Fool(F) (see below.) * The Fool, moves like the King, but is not subject to check or checkmate, and is capturable. It doesn't appear in the starting setup but is an available option when promoting a pawn. Other names for this piece are the Mann, the Commoner and the Prince. (The first letters of these names are already taken. The Prince has also a different movement in 3D chess.)

## Rules

As in standard chess, except what is stated above. Promotion to compound pieces is forbidden, they're too powerful in the small board. Notation of the cubes is as described above. Notation of the movement is as handled in Short Algebraic Notation; except that in case of ambiguity, the file where the piece starts is prefixed to its name. Moving the King's pawn two cubes forward is 1.cc4 (not unlike 1.e4 in standard chess.) A sample game can go like this : White Black 1. cc4 cb5 2. ccxcb5 cc5 3. cbxcc6 e.p. dbJcd6 In the last move, Black moved his db Jester to cd6 Castling is notated as a King's move : Kee1 is King castling with the ee Rook. It is possible to write something like O-B which King castling Bishop-side. (The Bishop's Rook, for example, is the one diagonally adjacent to a Bishop. The Merchant's Rook is the one diagonally adjacent to a Merchant, and so on.) Stalemate in this variant is not a draw, but not a full win either. It gets 3/4 in tournament counts. This rule is taken from Glinski's Hexagonal Chess.