Mastermind – board game

This model brings the full Mastermind board game into a compact, fully 3D‑printable form.

The complete game measures 235 × 140 × 30 mm .

The game uses a sliding system — the pin storage box slides into the main board . This keeps everything secure, portable, and neatly organized.

• The board is designed for bed‑printed graphics (ideally two‑color).
• For single‑color printing , an emboss version of the graphics is included.
• You can apply Fuzzy skin on the upper rim of the game pins for better grip.
• The lower part of each pin (the part inserted into the board) should remain smooth .

The locking pins that keep the sliding box closed are 1.5 mm tall . They are intentionally designed larger , so each user can adjust the opening force to their preference.

• At the original height, the box requires a lot of force to open — not ideal.
• I recommend lightly sanding the pins — I reduced them to about 0.9 mm .
• You can also trim them using a slicer modifier .

This adjustment significantly improves usability.

Game pins (colors)

• 160 pieces total
• 20 pieces for each of 8 colors

Information pins (black/white)

• 50 pieces total
• 25 pieces for each of 2 colors

Mastermind is a logic game for two players.

This version includes 5 positions for the secret code, offering a more challenging game. Players may start with easier variants:

• 4 positions – classic difficulty
• 3 positions – fast and simple
• You can also use fewer colors to simplify the game

Guess the secret color code created by the opponent.

• One player creates a secret combination of colored pins.
• The opponent places a guess in each row.
• The guess is evaluated using information pins:
• Black pin = correct color in the correct position
• White pin = correct color in the wrong position
• The guessing continues until the code is cracked or all rows are used.

The winner is the player who guesses the code in the fewest attempts .