Hedrex. Hexagonal Chess inspired by Grant Acedrex. Hedrex version 0.0.5
Hedrex version 0.0.3, 0.0.4, and 0.0.5 use multiple grids which require at least version 1.3 of Zillions.
Zillions 1.2 has a bug which causes scripts with multiple grids to miscompile into a single grid with extended position lables.
If you are still running Zillions 1., Zillions version 1.3.1 is available for free from Zillions-of-games.com/patches-131.html.

Like Grant Acedrex and modern Chess, two players alternate turns.
Like Shôgi, on each turn a player may do one of three actions:
move a piece to an empty space,
or move a piece to a space occupied by an enemy piece and capture it,
or enter a previously captured piece onto any empty space as one's own.
The object of Hedrex is to capture the enemy Rey.
In Hedrex there is no promotion, no castling, no en passant capture, no passing your turn, and no stalemate (if you can't move, you lose).

There are four kinds of move or capture:

Elefante and Cocatriz run along open spaces in a straight line as far as desired or until a capture is made.

• 1. Elefante runs orthogonally through adjacent open spaces. Elefante may capture an enemy any distance away in six directions.
• 2. Cocatriz runs diagonally, passing in between adjacent spaces, running through same colored open spaces.
  Cocatriz may also move like Elefante to any open space desired so she is not color-bound.
  Cocatriz may also capture like Elefante but only to spaces of same color as her current diagonal directions.

Aanca and Unicornio begin with equivalent leaps three spaces away to a space of different color for a move or a capture.

If that three-away space is open then the Aanca may continue orthogonally and the Unicornio may continue diagonally in as nearly as possible the same direction as the three-away leap along open spaces (not reachable by any other piece) as far as desired or until a capture (twelve directions each).

• 3. Aanca leaps diagonally into the air then runs orthogonally like the Elephant,
• 4. Unicornio leaps orthogonally into the air then runs diagonally like the Cocatriz.

In addition to three each of these four formidable animals, there are ten human pieces that move exactly like the Elefante, but may capture only an adjacent enemy, nine Peones and one Rey.

Hedrex takes much from a game described in a tenth-centure work, El Libro de los Iuegos. The game is called Grant Acedrex.

Moves and captures are first adapted faithfully to the hexagonal board.

Then the following changes are made to Hedrex:

The Roque is renamed Elefante but has exactly the same move and capture.

The Unicornio is identical to the one in Grant Acedrex.

The Aanca's diagonal first step is skipped over (airborn and unblockable), so that she begins with a horse-like leap like the Unicornio.

The Cocatriz's diagonal move is too weak on a hexagonal board, so her move and capture is supplemented with the Elefante's move but with captures limited to every third space (those of the diagonal color).

The Leon and the Zaraffa do not appear in Hedrex.
In Grant Acedrex, the Leon and the Zaraffa leap three spaces away.
These leaps would correspond to three, four, and five spaces away on the hexagonal board.
The combined moves of the four animals cover every space within five hexes.
The only space within six hexes not covered by a move of one of the four animals of Hedrex is the double horse move.

The Rey and Peones have the same move in Hedrex (more mobile than most Kings but weaker capture power than Chess King).

Recruiting captured pieces, dropping them on open spaces, is from Shôgi.