Partner 1680X Chess Computer
(600-2428A) Operation - Part 1 Faxback Doc. # 17069
TURNING THE GAME ON OR OFF
Switch I/O to I to turn the game board for a new game or to return to a s
saved game. Switch I/O to O to save the game and turn off the computer.
The computer stores all game positions and any next move calculations it
was computing.
NOTES: To save game information, you must install batteries in the
computer even if you are using an optional AC adapter.
If the computer was calculating a move when you turned it off, but
had not yet completed its calculations, it resumes its calculations
when you turn it back on
TURNING THE SOUND ON OR OFF
The computer's sound is normally on. To turn the computer's sound off,
press COACH LEVEL until the computer beeps once. Then the file board light
next to H (SILENT) lights for about 2 seconds. To turn the sound back on,
press COACH LEVEL until the file board light next to G (NORMAL) lights for
about 2 seconds.
NOTES: You can turn the computer's sound on or off any time during a game.
If you turn the computer's sound off, it does not beep even when
you make an illegal move
STORING/REMOVING GAME PIECES
1. Press down on the piece storage compartment cover's arrow, then slide
the cover in the direction of the arrow
2. Lift and remove the cover.
3. Remove or replace the pieces in the compartment.
4. Replace the cover
ADJUSTING THE DISPLAY CONTRAST
Switch I/O to I, then slide ||||| on the back to adjust the LCD display's
contrast.
STARTING A NEW GAME
Press NEW GAME to start a new game and erase any game stored in memory.
NOTE: The computer always starts a new game with you playing the white
pieces and your opponent the black pieces.
PLAY LEVELS
When you play against the computer, you can select a level that matches
your skill.
There are 64 levels. These include:
8 beginner levels (A1, L-b1 through A8, L-b8)
5 fun levels (B1, L-F1 through B5, L-F5)
1 indefinite response time level (B6, L-ln)
1 problem level (b7, L-CF)
1 mate finder level (B8, L-Fi)
8 practical levels (C1, L-P1 through C8, L-P8)
8 brute force levels (D1, L-t1 through L-t8)
8 fixed depth search levels (E1, L-d1 through E8, L-d8)
8 passive levels (F1, L-c1 through F8, L-c8)
8 aggressive levels (G1, L-g1 through L-c8)
8 normal play levels (H1, L-n1 through H8, L-n8)
The computer uses rank/file board lights to display the current level. It
also displays a code on the LCD display that corresponds to the current
level.
For example, if you choose level B2, the rank/file board lights indicate
square B2, and the display shows L-F2.
After you install batteries or press ACL to reset the computer, it resets
itself to level H4. After that, the computer remains on the last selected
level.
VIEWING THE CURRENT LEVEL
To view the current level, press LEVEL once. The computer beeps, the
rank/file board lights indicate the level, and the display shows the code
that corresponds to the level.
CHANGING THE LEVEL
You can change the level during your turn during a game.
1. Press LEVEL. The computer beeps, the rank/file board lights show the
current level, and the level's code appears on the display
2. Press the square on the game board that corresponds to the level you
want. The rank/file board lights and the display changes to show the
level you selected
3. Press LEVEL again.
CHOOSING A LEVEL
If you are a beginner, start out with the beginner levels (A1-A8) or fun
levels (B1-B5). The computer purposely makes mistakes on these levels so
you can beat the computer and learn while you play.
If you are an intermediate or advanced player, try the higher levels.
NOTE: When you set the level, keep in mind that when the computer has
more time to think about its moves, it plays better.
Beginner Levels (A1 Through A8)
The eight beginner levels let beginning and average players play (and win)
more easily than other levels. The computer makes common mistakes such as
leaving pieces unprotected, failing to capture unprotected pieces, and
capturing pieces while leaving the king unprotected.
To select any of these levels, press LEVEL, press square A1-A8, then press
LEVEL again.
NOTES: The computer's opening book memory contains many major opening
strategies so the computer can respond more rapidly during a game's
opening moves. The computer does not use its opening book memory to
computer moves in the beginning levels
Level A2 is the easiest, and the computer's playing strength
increases gradually up through level A8
The following table shows:
The square you press to select the level (after you press LEVEL)
The average amount of time the computer takes to determine its move at
that level
-------------------------------
| Square | Times Per Move |
-------------------------------
| A1 | 1 Second |
| A2 | 2 Seconds |
| A3 | 3 Seconds |
| A4 | 4 Seconds |
| A5 | 5 Seconds |
| A6 | 6 Seconds |
| A7 | 7 Seconds |
| A8 | 8 Seconds |
-------------------------------
Fun Levels (B1 through B5)
The five levels are designed especially for beginners. Like in the beginner
levels, the computer makes common mistakes at these levels, such as
capturing an opponents pawn by sacrificing its own higher-value place. To
select any of these levels, press LEVEL, press square B!-B5, then press
LEVEL again.
At the lower fun levels, the computer moves almost instantaneously, not
allowing itself to study a move in any depth.
NOTE: Level B1 is the easiest, and the computer's playing strength
increases gradually up through level B5.
The following table shows:
The square you press to select the level (after you press LEVEL)
Information about how the computer plays at the level.
------------------------------------------------------------------------
| Square | Information |
------------------------------------------------------------------------
| B1 | Computer might sacrifice its own higher-value piece 100 |
| | percent of the time. |
| | |
| B2 | Computer might sacrifice its own higher-value piece 75 |
| | percent of the time. |
| | |
| B3 | Computer might sacrifice its own higher-value piece 50 |
| | percent of the time |
| | |
| B4 | Computer might sacrifice its own higher-value piece 25 |
| | percent of the time |
| | |
| B5 | Computer ignores obvious mate-in-1-move |
------------------------------------------------------------------------
Indefinite Response Time Level (B6)
At the indefinite response time level, the computer searches for one move
that will checkmate an opponent. Use this level to have the computer
analyze complicated positions for hours or even days. To select this level,
press LEVEL, press square B6, then press LEVEL again.
If the computer finds such a move, the rank/file board lights show the
move. Otherwise, it continues to analyze the current game without making
another move until if finds one (or exhausts the batteries).
To stop the search and force the computer to make a move, press PLAY.
The computer displays the best move it found, and play continues.
Problem Level (B7)
At the problem level, the computer searches for one move that will capture
an opponent's piece worth more than 2 points.
NOTE: The computer assigns point values to the following pieces:
Pawn (1 point)
Bishop (3 points)
Knight (3 points)
Rook (5 points)
Queen (9 points)
To select this level, press LEVEL, press square B&, then press LEVEL again.
If the computer finds such a move, the rank/file board lights show the
move. If the computer cannot find such a move, it then analyzes the current
game to find a series of no more than four moves that will checkmate the
opponent's king.
If the computer finds such a series of moves, the rank/file board lights
show the first move in the series. If the computer cannot find such a
series of moves, it sounds an error beep. Then you must change levels and
press PLAY to return to normal play.
Mate Finder Level (B8)
The mate finder level lets you set up a position and let the computer try
to checkmate the opponent's king within 1 to 4 moves, regardless of the
opponent's defense.
To select this level, press LEVEL, press square B8, then press LEVEL again.
If the computer finds such a move, the rank/file board lights show the
move.
The computer sounds an error beep if any of the following occur:
No checkmate is possible
The computer cannot find a checkmate
You press the PLAY button while the computer is searching for a
solution
If an error beep sounds, you must change levels to return to normal play.
Practical Levels (c1 through C8)
At the practical levels, the computer attempts to capture the opponent's
pieces and place the opponent's king in check as often as possible.
However, the computer sometimes overlooks traps set by an opponent, and
sometimes positions its pieces so an opponent can easily attack them.
To select any of these levels, press LEVEL, press square C1-C8, then press
LEVEL again.
The following table shows:
The square you press to select the level (after you press LEVEL)
The average amount of time the computer takes to determine its move
------------------------------
| Square | Time Per Move |
------------------------------
| C1 | 1 Second |
| C2 | 2 Seconds |
| C3 | 5 Seconds |
| C4 | 10 Seconds |
| C5 | 30 Seconds |
| C6 | 1 Minute |
| C7 | 2 Minutes |
| C8 | 3 Minutes |
------------------------------
Brute Force Levels (D1 through D8)
The computer normally limits its search to moves most likely to be
successful. However, at the brute force levels, the computer checks every
possibility during play. To select any of these levels, press LEVEL, press
square D1-D8, then press LEVEL again.
The following table shows:
The square you press to select the level (after you press LEVEL)
The average amount of time the computer takes to determine its move
------------------------------
| Square | Time Per move |
------------------------------
| D1 | 1 Second |
| D2 | 2 Seconds |
| D3 | 5 Seconds |
| D4 | 10 Seconds |
| D5 | 30 Seconds |
| D6 | 1 Minute |
| D7 | 2 Minutes |
| D8 | 3 Minutes |
------------------------------
Fixed Depth Search Levels (E1 through E8)
At the fixed depth levels, the computer's search depth is limited by the
level you choose. The level number indicates the number of play (one of
your moves or one of the computer's moves) the computer will look ahead to
find a move.
For example, if you set the computer to fixed depth search level E1, the
computer searches ahead only one move, so it will often overlook a
checkmate in two moves. This gives beginners and average players a better
chance to win.
To select any of these levels, press LEVEL, press square E1-E8, then press
LEVEL again.
The following table shows:
The square you press to select the level (after you press LEVEL)
The number of ply the computer will search ahead to find a move
--------------------
| Square | Ply |
--------------------
| E1 | 1 |
| E2 | 2 |
| E3 | 3 |
| E4 | 4 |
| E5 | 5 |
| E6 | 6 |
| E7 | 7 |
| E8 | 8 |
--------------------
Passive levels (F1 through F8)
The computer normally chooses opening moves that allow openings and open
positions. However, you can set the computer so it can choose moves that
follow more passive and closed strategies.
For example, if you set the computer to passive level, the computer will
avoid attacks and keep closed positions, and often exchange pieces
unreasonably, such as its rook for an opponent's pawn. This results in
weaker play. To select any of these levels, press LEVEL, press square F1-
F8, then press LEVEL again.
The following table shows:
The square you press to select the level (after you press LEVEL)
The average amount of time the computer takes to determine its move
------------------------------
| Square | Time Per Move |
------------------------------
| F1 | 1 second |
| F2 | 2 seconds |
| F3 | 5 seconds |
| F4 | 10 seconds |
| F5 | 30 seconds |
| F6 | 1 minute |
| F7 | 2 minutes |
| F8 | 3 minutes |
------------------------------
Aggressive Levels (G1 through G8)
If you set the computer to the aggressive levels, it will avoid exchanging
pieces so it can present more potential attacks to an opponent (to keep the
game complicated). It will also check and attack an opponent's pieces in an
aggressive manner. This results in stronger play.
To select any of these levels, press LEVEL, press square G1-G8, then press
LEVEL again.
The following table shows:
The square you press to select the level (after you press LEVEL)
The average amount of time the computer takes to determine its move
------------------------------
| Square | Time per Move |
------------------------------
| H1 | 1 second |
| H2 | 2 seconds |
| H3 | 5 seconds |
| H4 | 10 seconds |
| H5 | 30 seconds |
| H6 | 1 minute |
| H7 | 2 minutes |
| H8 | 3 minutes |
------------------------------
NOTE: The time per-move figure is the average amount of time the
computer takes to make each move. During the opening moves of a
game, the computer might move more quickly.
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