Chess is one of the oldest games. There are variations too. In this instructable you will learn how making a chess variant works on chess.com.

Supplies

A chess.com account and a computer.

Step 1: Open Variants on Chess.com

Log into chess.com.
Click the hand holding a pawn.
Click on "4 Player & Variants".

Step 2: Open the Editor

Find "Custom" in the menu.
Scroll down, then click "Edit Position".

Step 3: Editor Controls

Drag a piece to the board to add it to the variant.
Click the erase tool to remove a piece.
Click the "Set Royals" button to set royals for each opponent. Check and checkmate rules are applied to royals.
If there is no royal for a player, the other player will have to capture all the opposing pieces.
There are also some sets of toggles.
For the first set of toggles, tap a toggle to prevent an army from moving.
For the second set of toggles, tap a toggle to have an army be controlled by a computer.
After toggling a toggle in this set, you may select a zombie type.
For the third and fourth sets of toggles, click a toggle to allow castling.

Note: These are not all the controls, and are some examples.

Step 4: Bricks

Bricks are tiles that pieces cannot move through, except for knights or any piece that is intended to jump.

Step 5: Duck

Ducks act like bricks until duck chess is activated; see step 7 for info about activating rules.

If duck chess is activated and there is a duck, then the duck has to move every turn. If there is more than one duck and duck chess is activated, then either duck can be moved.

Step 6: Fairy Pieces

You may notice some unfamiliar pieces. They are called fairy pieces. Hover your cursor over the piece to learn about it.

Step 7: Rules

While in the editor, click the X button.
Scroll down and click "Edit Rules".
You should see a list of rules. You can also change how pieces look.

Rule Examples:

Stonewall: After capturing, that piece becomes a brick.
Atomic: Pieces create a small explosion after capturing. The explosion would capture all adjacent pieces.
Pawns survive explosions.
If the explosion captures the king, the player who caused the explosion wins.
King of the hill: Reach the KOTH squares with your royal piece to win.
By default, the KOTH squares are the middle four, but you can change them with the editor.
Fog of war: Fog is present on tiles that your pieces do not occupy and tiles your pieces can't move on
Crazyhouse: Pieces you capture can be dragged onto the board.
Giveaway: Sacrifice all your pieces to win.
Capturing is required unless not possible.

Step 8: 1-Point Queen

This is a special queen. It is equal to a regular queen until game of points is activated. This type of queen is different because it is worth one point in point games.

Introduction: Making a Chess Variant on Chess.com