ABOUT RADIOSHACK 2-IN-1 CHESS & CHECKERS MODEL 60-2725 ELECTRONIC TRAVEL CHESS
Ron Nelson reported that in 1999 he spent 9 months in developing a new 4 Bit chess program which became the foundation for many future Excalibur models as well as its continued use by Excalibur's successor EB Electronics. The first 4 Bit Model 375 Excalibur LCD Chess was launched in the year 2000. This program can also be found inside many chess computer models sold by other companies such as Radio Shack.
This 4 Bit program seems to be per Nelson's comments an even further slimmed down version of the original Nelson H8 program, compressed into this much smaller hardware and trimmed with many of the features of the original stronger H8 program removed in order to squeeze a workable chess program into the lesser ram space available on the 4 Bit hardware. This included removal of many of the more sophisticated chess routines used in stronger chess programs such as Nelson's Attack Bit Map Tables, much smaller opening books, removal of any pondering routines and excess search routines.
Nelson commented on his great interest in developing a capable program suitable for any beginning or hobby chess player and thereby finding larger outlets of distribution for the Excalibur chess products. Radio Shack 2-in-1 Chess & Checkers is a very playable and capable chess program ideal for most players was one of the many creations that followed as a result of this nine month period of new program development in 1999.
Radio Shack 2-in-1 Chess & Checkers was sold to Radio Shack by Excalibur. Excalibur contracted the manufacturing to Cybertronics (Expert) in the Shenzen Province of China.
The chess program is Ron Nelson's Version 3.8 24K 4 Bit program which comprised of his 16K 4 Bit chess program plus 8K additional programming. Part of this additional 8K programming was to create a Universal I/O to allow easier adaptation to other chips used in other Excalibur chess computer models.
MAIN RADIOSHACK 2-IN-1 CHESS & CHECKERS MODEL 60-2725 GAME CHARACTERISTICS
GREAT GAMES
Select on of 16 of the world’s greatest chess games.
MATE PROBLEMS
Select one of 31 mate-in-2 problems. Problem 32 is a mate-in-3 problem.
- Chess and Checker included
- 1 or 2 Players
- Great for beginners and challenge the most seasoned players
- Multiple advanced training features
- Automatic power down features
- Large LCD Screen
- Powerful Opponent and No Board to Setup!
- User Selectable 16 Checker and 73 Chess Levels
Excerpts taken from the RADIOSHACK 2-IN-1 CHESS & CHECKERS user manual.
Technical Specification
RadioShack 2-in1 Chess & Checkers (2004)
Control Buttons
LCD Dot Matrix
Direction Buttons
Spacious Mind
Schachcomputer.Info
Active 2017
Tourn. 2015
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T1
T2
T3
T4
T5
Final
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MANUFACTURER
PROGRAMMER
RadioShack/Tandy Corporation
Ron Nelson
1750 USCF
2004
$49.00
Not Available
Year:
MFR ELO:
Original Price:
Wiki ELO:
Model #:
60-2725
My Serial #:
Not Available
Processor OEM
Samsung
Processor:
SAM47 S3C72P9
Speed:
Type:
4 Bit
1.5 MHz
ROM:
16 KB + 8 KB
RAM:
1056 x 4 Bit
Battery Type:
3 x AA
Power Adapter:
Not Available
Display:
LCD Dot Matrix
Board Type:
LCD Chess Board
Overall Size:
Board Size:
2x2 in
5.1/2x3.7/8x1 in
Options Select:
Button Select
Play Levels:
73
Opening Book:
34 Openings
Take Back:
Complete Game
Position Setup:
Available
Position Verify:
Available
Move Analysis:
Display Info:
Not Available
Not Available
Solve Mate:
Mate in 8
Save Game:
Available
Ponder:
Not Available
Search Depth:
16 Ply Max.
Provide Hint:
Available
Teach Mode:
Available
Change Sides:
Available
Active Level:
TM Level:
72
Infinite Level:
73
25
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
CCNS 2013
Ply
FIDE
USCF
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Class C Level Electronic Travel Chess Computer!
