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move or make a move of your own.
3.5 Mate Finder Level (B8)
MATE FINDER LEVEL
Square B8 ......... Solves mate problems
Selecting this level activates a special mate finder
program. If you have a position where there may be a
mate and you want the computer to find it, set the com-
puter on this level. The computer will then search for a
forced mate, and will only play a move if it finds a mate. It
can solve mates in up to four moves.
If there is no mate present or if the computer cannot
find a mate, it sounds a beep and the previously flashing
color indicator turns on steadily. You may continue play, if
desired, by simply changing levels.
3.6 Practice Levels (C1-C8)
PRACTICE LEVELS
Square C1 ...................... 1 second
Square C2 ...................... 2 seconds
Square C3 ...................... 5 seconds
Square C4 .................... 10 seconds
Square C5 .................... 30 seconds
Square C6 ...................... 1 minute
Square C7 ...................... 2 minutes
Square C8 ...................... 3 minutes
The Practice Levels offer you a great chance to
sharpen your chess playing skills! On these levels, the
computer will play for captures and checks as much as
possible. The program may intentionally overlook traps in
order to encourage you to play for traps and threats. You
will also notice the computer positioning its pieces so that
they may easily be attacked.
3.7 Tactical Levels (D1-D8)
TACTICAL LEVELS
Square D1 ...................... 1 second
Square D2 ...................... 2 seconds
Square D3 ...................... 5 seconds
Square D4 .................... 10 seconds
Square D5 .................... 30 seconds
Square D6 ...................... 1 minute
Square D7 ...................... 2 minutes
Square D8 ...................... 3 minutes
Although the Tactical Levels have the same search
times as the Normal Playing Levels, the computer plays
differently here because it employs a different search
method. On the Normal Playing Levels, the computer
uses a Selective Search algorithm. This method allows
the computer to see combinations that would otherwise
take much longer to compute. On the Tactical Levels,
however, the computer switches to a powerful Brute
Force Search algorithm. This helps to minimize the risk of
an occasional oversight.
3.8 Fixed Depth Levels (E1-E8)
FIXED DEPTH LEVELS
Square E1 .......................... 1 ply
Square E2 .......................... 2 ply
Square E3 .......................... 3 ply
Square E4 .......................... 4 ply
Square E5 .......................... 5 ply
Square E6 .......................... 6 ply
Square E7 .......................... 7 ply
Square E8 .......................... 8 ply
On the Fixed Depth Levels, the computer's search
depth is limited to certain number of ply. A ply is an indi-
vidual move, or a move for either side. As an example, on
Level E1, the computer only searches to a depth of one
PURPOSE
AVERAGE TIME PER MOVE
AVERAGE TIME PER MOVE
SEARCH DEPTH
TEACH MODES AT A GLANCE!
1. Press LEVEL to enter Teach Mode.
2. Press a square to select a playing level (see the
chart in Section 3.)
3. Choose your mode.
To study QUEENS...
Press
(Only Kings, Queens, and pawns
on the board)
To study ROOKS...
Press
(Only Kings, Rooks, and pawns
on the board)
To study BISHOPS...
Press
(Only Kings, Bishops, and pawns
on the board)
To study KNIGHTS...
Press
(Only Kings, Knights, and pawns
on the board)
To study PAWNS...
Press
(Only Kings and pawns on the
board)
4. Press LEVEL to enter your selection into the computer.
Now you can play, studying the piece of your choice!
Note: The KING key is reserved for the standard game,
using all 32 pieces. Board lights 2 and 7 will turn on to
indicate this if the KING key is pressed during the above
procedure.
ply, and thus only looks ahead one individual move. This
results in much weaker play, giving beginners and aver-
age players a better chance of beating the computer.
These levels start out easy and get progressively more
difficult—as you conquer each level, go on to the next!
3.9 Quiet Closed Game Levels (F1-F8)
QUIET CLOSED GAME LEVELS
Square F1 ...................... 1 second
Square F2 ...................... 2 seconds
Square F3 ...................... 5 seconds
Square F4 .................... 10 seconds
Square F5 .................... 30 seconds
Square F6 ...................... 1 minute
Square F7 ...................... 2 minutes
Square F8 ...................... 3 minutes
On these eight levels, the computer gives preference
to a quiet, passive style of play. Here, you will see the
computer exchanging pieces as much as possible, in an
effort to avoid complications and simplify the board posi-
tion. With this type of play, the program also avoids at-
tacks and keeps positions closed whenever possible.
3.10 Aggressive Game Levels (G1-G8)
AGGRESSIVE GAME LEVELS
Square G1 ...................... 1 second
9
Board Lights On
7
6
6
5
5
4
4
3
3
2
AVERAGE TIME PER MOVE
AVERAGE TIME PER MOVE
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