Mirror Setup Guide:

1. Choose the Mirror:

• • Use a small, compact mirror (e.g., a makeup mirror, tiny glass fragment) for subtlety. Avoid shiny objects like CDs, which reflect too much light.

2. Optimal Placement:

• • On-Table Position: Place the mirror near the edge of your side of the board, angled downward to reflect your opponent’s pieces. Ensure it’s hidden among your pieces or against the table’s border.
  • Under-Table Option: Tape the mirror to the underside of the table, tilted upward to capture reflections. Use clear tape or adhesive putty to avoid detection.

3. Angle Adjustment:

• • Angle the mirror so it reflects the opponent’s half of the board clearly. Test the view beforehand to confirm visibility without obstructing play.

4. Covert Observation:

• • Practice glancing at the mirror naturally during moves (e.g., while adjusting a piece). Avoid excessive head movements that might alert your opponent.

5. Alternative Techniques:

• • Periscope Method: Use two small mirrors—one on your side reflecting to a second hidden under the table—for better coverage.
  • Glass Pieces Trick: Hollow out a chess piece and place a mirror inside to reflect their board when viewed from above.

Key Considerations:

• Lighting: Ensure ambient light allows clear reflections but avoid glare that might reveal the mirror.
• Subtlety: Keep the mirror small and blend it with surroundings (e.g., behind pawns or near the table’s edge).
• Legality: Note that using aids in official tournaments is prohibited. This method works best in casual settings.

By testing placement and maintaining discreetness, you can effectively use a mirror to gain strategic insight without detection.