1. Not So Deep Blue

2. Project Overview LED chess board Detect piece movement
Magnets/Reed switches
Show possible moves
Track game time
(picture taken from a DIY project)

3. Product Comparison Features Not So Deep Blue Excalibur Grand Master
Dual Chess Clocks
Piece Recognition
Illuminating Pieces
Possible Move Display

4. Product Comparison Features Not So Deep Blue
Saitek Mephisto Chess Trainer
Dual Chess Clocks
Piece Recognition
Illuminating Pieces
Possible Move Display

5. Piece Detection
Us: Magnets on pieces, reed switches under board squares
Them:
Little Alec

6. Patents Variations of the game of Chess
Lights, other circuitry in each piece
Chess clocks

7. Patents: Electronic chess game
Claim:
“…An electrical circuit associated with the playing position causes other positions to which the playing piece is capable of moving to be illuminated with an appropriate color…”

8. Patents: Electronic chess game
Claim:
“…An electrical circuit associated with the playing position causes other positions to which the playing piece is capable of moving to be illuminated with an appropriate color…”
Same functionality as “possible moves”, but claim filed in 1980.

9. Conclusion No commercial products similar (price?)
No literal infringements found (yet)

10. Questions?