What puzzle do I need to bring to a WCA competition?

Short answer: you need any working puzzle for the event you’re competing in that complies with WCA rules. You don’t need the “most expensive” model. The important part is that the puzzle is an allowed type, does not provide an unfair advantage, and is in good condition.

1) The puzzle must match the event

Each event requires its own puzzle: for 3×3 you need a 3×3 cube, for Pyraminx you need a Pyraminx, etc. Organizers are not required to provide puzzles for competitors — bring your own.

2) Basic WCA requirements (in simple terms)

• No electronics: the puzzle must not contain electronic components (Bluetooth/Wi-Fi, motors, sensors, lights, etc.).
• No “concept upgrades”: you may not modify a puzzle in a way that gives extra information about its state (piece orientation/identity) or changes the puzzle’s “concept” (new moves, automatic movement, etc.).
• Colors must be clear: one uniform color per face, and all colors must be clearly distinguishable.
• No distinguishable pieces: you may not make similar pieces identifiable by touch or appearance (marks, bumps, damage, etc.).
• The Delegate decides edge cases: if a puzzle is “non-standard”, a WCA Delegate may allow or disallow it.

3) Examples of unsuitable puzzles (common rule violations)

A) “Smart” and electronic puzzles — not allowed

• Any smart cube with Bluetooth/Wi-Fi (even if you “don’t connect anything”).
• Puzzles with sensors, lights, a motor, vibration, sound, etc.
• Any electronic “modules” built into a puzzle (even if it looks like “just move counting”).

B) Textures, marks, and “hints” on pieces — not allowed

• Textured stickers (especially if the texture lets you identify pieces by touch).
• Bumps/dents/relief on specific pieces (for example, a “dot” on one edge/corner).
• Marker/pen, numbers, arrows, dots on colored parts if they help distinguish otherwise similar pieces.
• Tape on specific pieces if it makes a piece identifiable compared to similar pieces.
• Engraving/embossing used to “label” pieces (generally not considered acceptable as common practice).

C) Transparency that reveals “extra information” — not allowed

The key is not transparency itself, but whether you can see more than you normally could.

• A fully transparent cube or “windows” that let you see colors/stickers from the back side, internal colored parts, etc.
• Transparent parts that make it easier to determine the state (for example, seeing “wrong orientation” or exact internal positions where that is normally hidden).

Note about Clock: a transparent Clock case can be allowed, but any transparent/non-standard design that reveals “extra information” about the state may be disallowed. If you’re unsure, show it to the Delegate in advance.

D) “Unusual coloring” and hard-to-distinguish colors — often not allowed

• Colors that are too similar (e.g., two close shades of blue/green), making it hard for a judge to verify solved state.
• Gradients, patterns, semi-transparent/iridescent finishes that break the “one uniform color per face” principle.
• Non-standard color schemes for polyhedra if faces are not “one color per face” and it departs from the base model.

E) Modifications that change the puzzle’s “concept” — not allowed

• Mods that make normal moves impossible (e.g., intentionally bandaged/glued parts that block movement).
• Mods that enable new moves or create additional solved states.
• Any elements that cause automatic movement (roughly: “it turns/finishes by itself”).

F) Poor condition that makes pieces identifiable — not allowed

• Major chips/cracks or pieces that feel different by touch, allowing identification of a specific piece.
• Dirt, glue residue, worn areas that create noticeable differences between otherwise similar pieces.

4) Special events: where checks are stricter

Blindfolded

Here it’s especially important that pieces cannot be distinguished by touch. Any bumps/textures that allow identifying piece orientation/identity by feel can lead to the puzzle being disallowed.

Clock

Clock has some specific allowed visual modifications (for example, custom inserts and certain design customizations), but the core principle still applies: no unfair advantage. If your Clock is non-standard, show it to the Delegate in advance.

Also important: a Clock with “loose” pins that switch/drop due to gravity is considered not allowed.

5) If you’re unsure — what to do

1. Bring a spare puzzle if you have one.
2. Before your attempts start, show your puzzle to the WCA Delegate and ask if it’s okay.
3. If the Delegate says “not allowed” — don’t argue at the station: just use a replacement.

Short answer

Any working puzzle for your event is fine as long as it has no electronics and no “hints” (marks/textures/transparency that reveals extra information). The safest choice is a standard mass-market model with normal colors. If your puzzle is unusual, show it to the Delegate in advance.