Partner 1680X Chess Computer
(600-2428A)             Advanced Functions            Faxback Doc. # 17071

VERIFYING PIECE POSITIONS

If you want to verify the location of any piece on the chess board, you can
use the piece symbol keys to find the position of all pieces. Each time you
press a piece symbol key, the computer displays the piece's color and
location, and the rank/file board lights indicate the piece's location.

For example, if the white queen is on square D1, and you want to verify its
location, press the queen piece symbol key. The computer displays symbol
d1.

If there is more than one of the same color pieces on the board, repeatedly
press the piece symbol key. The display and the rank/file board lights show
you the location of each same color pieces. If you press the piece symbol
key more times than the number of same color pieces on the chess board,
the display shows the piece symbol and --.

You can use the piece symbol keys to verify the location of your pieces
during your turn. During the computer's turn, the piece symbol keys verify
the location of the computer's pieces.

To verify the location of the black pieces, press COLOR, then press the
piece symbol key for the pieces you want to find. Press COLOR again to
switch back to white.

Press any key to return to normal play.

TAKING BACK MOVES

This function lets you take back any move made by you or the computer after
the move has been completed. If you change your mind before pressing the
piece down on the TO square, follow the procedures in "Correcting
Accidental Wrong Moves."

NOTE:  You can take back moves only during your turn. If you try to take
       back a move during the computer's turn, the computer will not allow
       you to take the move back until you have made the move it specifies.

1.  Press TAKE BACK. Both the rank/file board lights and the display
    show the TO square of the last move

2.  Press the piece on the indicated TO square. The rank/file board lights
    show the FROM square of the last move

3.  Move the piece from the TO square to the FROM square

4.  Press the piece on the indicated FROM square.

5.  Repeat Steps 1 through 4 to take back additional moves. You can take
    back up to 3 moves (your move and the computer's move counts as 1
    move)

As you take back moves, the computer will not remind you to return a
previously captured piece to the board nor a castled rook to its original
square. If you are not sure about the position of a previously captured
piece or castled rook, see "Verifying Piece Positions."

PROBLEM SETUP

During your turn, you can use the setup mode:

    To erase, re-enter , or relocate pieces any time before or during a
    game.

    To set up problems or puzzles for the computer to solve.

Press SET UP to enter the set up mode.

Before using this mode to create your own positions, familiarize yourself
with this procedure by setting up the board positions described in the
following examples.

FULL BOARD SETUP

In a full board setup, the computer records the positions you enter into
memory and assumes all other pieces remain in their initial positions. You
only need to go through these steps for pieces which you want to remove or
move from their initial positions.

Follow these steps to set up a game with most of the chess pieces in their
original positions.

1.  Press NEW GAME

2.  Choose the pieces you want to play with.

3.  Press SET UP. The computer displays -- SET Up.

4.  Press the piece symbol key for the piece you want to move or remove and
    COLOR to change the color, if necessary. The computer displays the
    piece symbol for the piece you want to move or remove, and the
    rank/file board lights indicate the FROM square. If you want to move or
    remove more than one of the same pieces, repeatedly press the piece
    symbol key until the rank/file board lights indicate the FROM square of
    the correct piece.

5.  Press the piece on its square. The computer displays the piece you want
    to move or remove, and the rank/file board lights flash to indicate the
    FROM square

6.  Either remove the piece, or move the piece to he square where you want
    to put it, then press it on the square. The computer displays the piece
    symbol and either the square you removed it from or the square you
    moved it o, and the rank/file board lights indicate the new square

7.  Repeat Steps 5 and 6 for any other pieces you want to move or remove.

8.  When you finish setting up the pieces, press COLOR until the computer
    displays a piece symbol for the color whose turn it is, then press SET
    UP. Otherwise, simply press SET UP, then choose the level you want
    and continue the game

NOTE:  If the computer displays ILL after you complete Step 7, it indicates
       that one or more pieces were moved, removed, or entered illegally.
       To correct the set up, see "Correcting Illegal Setups."

PARTIAL BOARD SETUP

Follow these steps to clear the chessboard and set up only a few pieces.

1.  Press NEW GAME.

2.  Press SET UP. The computer displays -- SET Up.

3.  Press TAKEBACK. The computer displays CLr for about 2 seconds, and
    clears the positions of all pieces from the board

4.  Press the piece symbol key for the piece you want to add and color to
    change the color, if necessary

5.  Press the piece on the square where you want to put it. The computer
    displays the piece symbol for the piece you added and its TO square,
    and the rank/file board lights indicate the TO square

6.  Repeat Steps 4 and 5 for any other pieces you want to set up.

7.  When you finish setting up the pieces, press COLOR if necessary to
    choose whose turn it is to make the move, then press SET UP. Then
    choose the level you want and continue the game

NOTE:  If the computer displays ILL after you complete Step 7, it indicates
       that one or more pieces were set up illegally. To correct the setup,
       see "Correcting Illegal Setups."

Erasing or Adding Pieces During a Game

Follow these steps to erase or add pieces during a game.

1.  Press SET UP. The computer displays --SET UP.

2.  Press the piece symbol key for the piece you want to erase or add and
    COLOR to change the color, if necessary

3.  Press the square where you want to erase or add the piece, then remove
    or add the new piece. The compute displays the piece symbol for the
    piece you erased or added and its FROM square, and the rank/file board
    lights flash to indicate the FROM square

4.  Repeat Step 3 for any other pieces you want to erase or add.

5. When you finish setting up the pieces, press SET UP.

NOTE:  If the computer displays ILL after you complete Step 5, it indicates
       that one or more pieces were erased or added illegally. To correct
       the set up, see "Correcting Illegal Setups."

Correcting Illegal Setups

To be legal, a set up must meet the following conditions. Otherwise, you
must correct any illegal entry.

    Each side has one king.

    The king for the side which is to move is not in check.

    There are no pawns on the first or eighth rank.

If the computer displays ILL, it indicates that one or more pieces were set
up illegally. To correct the setup:

1.  Press the piece symbol key for each piece on the board to verify piece
    positions

2.  Set up a piece, or remove the illegal piece, or replace an incorrectly
    placed piece with the right piece

3.  Press SET UP

POSITION EVALUATION

The computer can evaluate the current board position. Press EVALUATION
during the computer's turn. The computer displays symbol E nn.  nn is an
evaluation rating from-99 to 99.

If the evaluation raring is a positive number, it means that white has an
advantage over black. If the evaluation rating is a negative number, it
means that black gas an advantage over white.

NOTE:  The evaluation rating might change during the computer's move
       because the computer follows different play lines in its analysis.

When the computer makes its move, it returns to normal display. Press
EVALUATION again after you have made your move to see the computer's next
move and continue the game.

NOTE:  The computer will not display an evaluation rating while set to a
       mate search level.

SEARCH DEPTH AND CURRENT MOVE

While the computer is thinking, press DISPLAY MOVE to see the search depth
and move that it is currently considering. The computer displays the search
depth, indicating how far ahead in the game the computer is considering its
reaction, to a move you might make. For example, d-2 shows that the
computer is considering its move to a depth of 2 half-moves (1 move). The
computer also changes the rank/file board lights, showing the moves it is
considering.

When the computer makes its next move, it displays the move.

NOTE:  The computer will not display search or current move information
       while set to a mate search level.