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About CXG Sphinx Legend (1992) Electronic Chess Computer

CXG Legend picture taken from the box front.

CXG Legend picture taken from the box front.

 

The CXG Sphinx Legend chess program was created by the Hungarian programmer Guyla Horvath and is based on his “Pandix” program that won the amateur world championship in 1987.

The normal out of the box playing style is a little passive but you do have the ability to change its play in 9 styles ranging from ultra-cautious play when the program is WHITE and ultra-aggressive play when it is BLACK (style number 1), to ultra-aggressive play when the program is WHITE and ultra-cautious play when it is BLACK (style number 9). The normal style is style number 5.

The CXG Sphinx Legend also has some other interesting features:

WHY NOT?

After the computer has made a move you can ask it the question: “Why did you not play ......?” and suggest a different move. The computer will then tell you what it expected you to play in reply if it had chosen your suggested move. (This will not always be the best move but it will be a move which the computer considered strong enough to counteract your suggested move.)

 

This logo was typically used on a CXG Chess Computer box

This logo was typically used on a CXG Chess Computer box

 

USER PROGRAMMABLE EVALUATION FUNCTION

Every chess program needs to know how to evaluate a chess position. It does so using an Evaluation Function which gives a point-score to various features of the position, such as king attack, material, mobility, center control, etc. Associated with each of these features is a “weighting” which tells the program how much importance to attach to a feature.

The Sphinx Legend allows you to change these weightings so that you, the user, are programming the computer to play in a particular way. For each feature the minimum weighting is 0 (when this feature would be completely ignored) and the maximum weighting is 99 (when the feature will be given 10 times its normal importance).

The normal factory out of the box weighting is 50 for all of these features. There are 7 features in total where the weightings can be adjusted from 0 to 99:

              • Pin against the enemy Queen.
              • Pawn structure around the King.
              • King attack by pieces.
              • Aggressive play by White’s pieces.
              • Aggessive play by Black’s pieces.
              • Doubled pawns.
              • Rooks on open and half open files.

Partial excerpts taken out of the CXG Legend User Manual.

 

This picture is taken from the CXG Legend Box. In the United States Excalibur Electronics marketed the CXG Legend. This also explains why Excalibur Electronics later named their own slightly different designed version as Excalibur Legend II. Both computers are identical in playing strength. Only the electronic board looks different.

This picture is taken from the CXG Legend Box. In the United States Excalibur Electronics marketed the CXG Legend. This also explains why Excalibur Electronics later named their own slightly different designed version as Excalibur Legend II. Both computers are identical in playing strength. Only the electronic board looks different.

 

Information on  CXG Sphinx Legend (1992) Electronic Chess Computer
CXG Sphinx Legend (1992) Electronic Chess Computer

Technical Specification

CXG Sphinx Legend (1992)

CXG Sphinx Legend (1992) Box
CXG Sphinx Legend (1992) User Manual
CXG Sphinx Legend (1992) LCD Display

Box

User Manual

LCD Display

Spacious Mind

Schachcomputer.Info

Active 2017

Tourn. 2015

1792

-

T1

T2

T3

T4

T5

Final

2028

2068

2258

1914

1934

2054

MANUFACTURER

PROGRAMMER

CXG / Newcrest Technology Ltd.

Gyula Horvath

1950  European

1992

$129,00

1800

Year:

MFR ELO:

Original Price:

Wiki ELO:

Model #:

CXG - 603

My Serial #:

Not Available

Processor OEM

Hitachi

Processor:

H8

Speed:

Type:

8 Bit

10 MHz

ROM:

32 KB

RAM:

1 KB

Battery Type:

4 x AA

Power Adapter:

9V DC 5 mA

Display:

16 Board LEDs

Board Type:

Press Sensory

Overall Size:

Board Size:

8x8 in

11x9.1/2x1

Options Select:

Button Select

Play Levels:

100

Opening Book:

3000 Positions

Take Back:

16 Half Moves

Position Setup:

Available

Position Verify:

Available

Move Analysis:

Display Info:

Available

Available

Solve Mate:

Mate in 6

Save Game:

Available

Ponder:

Available

Search Depth:

Not Known

Provide Hint:

Available

Teach Mode:

Available

Change Sides:

Available

Active Level:

TM Level:

93

Infinite Level:

94

53

Hardware Specification

Game Features

Matchplay & Test ELO Ratings

Computer Game Rating

Rating Test

Other  Computer Chess Ratings

USCF

USCF

Spacious Mind

Human Rating

USCF

CCR 95

CCNS

Ply

FIDE

USCF

1985

-

-

1861

1878

Class A Level Electronic Table Top Chess Computer!

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