Novag sapphire II Instruction Manual - page 20
19
For example the following well known end game position takes the computer about 28 seconds to find the correct solution
= move KB1!. With Hash Tables turned off this would take perhaps many hours to find!
-+-+-+-+
mk-+-+-+-
-+-zp-+-+
zp-+P+p+-
P+-zP-zP-+
+-+-+-+-
-+-+-+-+
mK-+-+-+-
37.
SELECTIVE SEARCH (Key B2)
The default mode is [SEL
≡≡≡≡
] which means Selective Search ON. Normally the Selective Search allows the computer to find
combinations much faster than a Brute Force Search. Selective Search ON should play about 120 rating points stronger
than having Selective Search OFF.
38.
PASSIVE BOOK (Key C3)
Turning on Passive Book [PASS
≡≡≡≡
] will make the computer prefer to play certain opening book lines that are more passive
in nature.
39.
ACTIVE BOOK (Key D4)
Turning on the Active Book [Act
≡≡≡≡
] will make the computer prefer to play certain opening book lines which are more active
in nature. Both Active and Passive Book may be on at the same time!
40.
OPENING BOOK (Key E5)
Turning off the opening book [booH] will disable both the normal built in opening book and the PRO-OP book.
41.
LEARN (Key F6)
Turning Learn mode on [LEArn
≡≡≡≡
] will allow the computer to learn from some of its mistakes. When the computer plays a
move in which it becomes worse off, it will remember the position and how deeply it searched into the position. When it
comes to this position again it will remember that things turned out badly and will try and find a different move to play.
To clear all remembered positions, press the CLEAR key while the LCD shows [LEArn
≡≡≡≡
]. The display will then show
[cLEAr] to indicate that you have cleared the current learning table.
42.
EXTENSIONS (Key G7)
The chess playing program in your computer uses a number of intelligent heuristics to direct the search to look deeper into
relevant positions and to try to resolve tactical skirmishes. Turning off this mode will disables the Extension possibility.
This makes the search faster in most positions but means the computer may miss some important tactical threat.
43.
*TEST (Key H8)
This function is mainly provided for the authorised NOVAG service technician.
Pressing the TAKE BACK key twice will cause the internal test to be performed which checks the hardware of your
computer and reports any problems to the interface. Do not be alarmed when the LEDs and LCD behave erratically for a
few seconds while the tests are being performed. This is because all the memory is being tested which affects the operation
temporarily of the LEDs and LCD.