15
15. ACOUSTIC SIGNALS (Sound Key)
The acoustic signals and beeps can be switched ON and OFF with the SOUND key.
16. CHESS
PROBLEMS
On Level H1-H6, your NOVAG OPAL II can solve most chess problems as well as
mate problems up to Mate-in-6. Press NEW GAME and set up the required board
position (see section 12.). Before you start with the mate search, it is advisable to
verify the Set-Up board position via the VERIFY function and make sure that the
color to move is correct, if not change this by pressing the COLOR key. Set now
one of the Problem Solving Levels as described before.
Press GO once to exit the setting up of the mate search and then press GO a second
time and the computer begins with the mate search.
Mates-in-1 to Mates-in-3 are usually found quickly, whereas Mates-in-4 to Mates-
in-6 require quite a long time.
If there is a solution, the computer will show you the moves to execute. If there is
no solution, the ERROR LED will light up.
If you wish to continue the game, select another level and enter your next move.
Example
:
If you wish to solve a Mate-in-2 problem, place the 3 pieces on your chessboard as
shown on the diagram.
Proceed now as follows and press:
NEW GAME
→
LEVEL key
→
press square H2
→
GO key
→
VERIFY/SET UP key twice
→
CLEAR key
→
King piece symbol
→
enter square F6
→
Rook piece symbol
→
enter square B4
→
COLOR key
→
King piece symbol
→
enter square G8
→
COLOR key, it is White to move
→
GO key : to exit the above setting
→
GO key : to start the mate search
The NOVAG OPAL II will answer with the first halfmove:
1. B4-H4. The Black King can only move G8-F8; please execute this move. The
NOVAG OPAL II will make its counter move with 2. H4-H8 MATE!
