Four peg color code breaking game

Read the feedback and crack the four-color code. Choose colors for your guess, then submit it. Guess the code before your attempts run out.

How to play

1. Choose a color for every code position; colors may repeat. Fill every slot before submitting a guess.
2. Black dots mean the position and color are both correct; white dots mean a correct color in the wrong position. Dots are not position-ordered.
3. Use previous feedback to narrow the code and solve it before attempts run out. Locking saves a color choice; it does not confirm correctness.

Board strategy

• Dots and Boxes — Draw the last edge to claim a little square.
• Hex — Connect your two sides with a chain of pieces.
• Nim — Who should take the very last stone?