Not So Deep Blue
•LED chess board
•Detect piece movement
•Magnets/Reed switches
•Show possible moves
•Track game time
(picture taken from a DIY project)
Product Comparison
Features
Dual Chess
Clocks
Piece
Recognition
Illuminating
Pieces
Possible
Move
Display
Not So
Deep Blue
Excalibur Grand
Master
Product Comparison
Features
Dual Chess
Clocks
Piece
Recognition
Illuminating
Pieces
Possible
Move
Display
Not So
Deep Blue
Saitek Mephisto
Chess Trainer
Piece Detection
Us:
Magnets on pieces,
reed switches under board squares
Them:
Little Alec

Variations of the game of Chess

Lights, other circuitry in each piece

Chess clocks
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…”
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.

No commercial products similar (price?)

No literal infringements found (yet)