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CXG Sphinx Legend (1992)
CXG Legend

“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.)

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 CXG 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:

  1. Pin against the enemy Queen.
  2. Pawn structure around the King.
  3. King attack by pieces.
  4. Aggressive play by White’s pieces.
  5. Aggessive play by Black’s pieces.
  6. Doubled pawns.
  7. Rooks on open and half open files.

Partial excerpts taken out of the CXG Legend User Manual.

CXG Sphinx Logo

This logo was typically used on a CXG Chess Computer box

CXG marketed by Excalibur Electronics in USA

The above 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

CXG Sphinx Legend (1992)

CXG Sphinx Legend (1992)

Box

CXG Sphinx Legend (1992) Box

User Manual

CXG Sphinx Legend (1992) User Manual

LCD Display

CXG Sphinx Legend (1992) LCD Display

WHY DID YOU NOT PLAY ..........?

Technical Specifications

Manufacturer

Programmer

CXG / Newcrest Technology Ltd.

Gyula Horvath

Year:

1992

Manufacturer ELO

?

Original Price

199.00 DM

Wiki ELO:

1800

Model #:

CXG - 301

My Serial #:

N/A

Processor Type

Speed

ROM

RAM

H8

8 Bit Single Chip

10 (20 MHz Quartz)

32 KB

1 KB

Battery Operated:

4 x AA

Adapter Option:

9V DC 5 mA   -   3.5 mm Plug

Display Type:

LCD 5 Pos 7 Seg. 16 Coord. LED’s.

Board Type:

Sensory Electronic

Board Size:

8” x 8”

Overall Size:

11” x 9.1/2” x 1”

Move Entry

Options Selection

Playing Levels

Opening Library

Take Back Moves

Push Sensory Board

Push Button Controls

100

5300 Half Moves

16 Half Moves

Position Setup/Ver.

Display Move Info/Analysis

Solve Mate

Save Game / Ponder

Hint/ Teach Mode

Yes / Yes

Yes / Yes

Mate in 6

Yes / Yes

Yes / Yes

Active Level:

Level 53

Tournament Level:

Level 93

Infinite Level:

Level 94

Game Information

Schachcomputer.Info

The Spacious Mind

Active Games (30s:1 or 60/30 etc.)

Active Games (30s:1 or 60/30 etc.)

#

W

D

L

%

ELO

#

W

D

L

%

ELO

224

56

74

94

41.5

1793

n/a

n/a

n/a

n/a

n/a

n/a

Tournament Games (180s:1 or 40/2 hrs)

Tournament Games (180s:1 or 40/2 hrs)

#

W

D

L

%

ELO

#

W

D

L

%

ELO

81

26

16

39

39.5

1817

n/a

n/a

n/a

n/a

n/a

n/a

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