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from  storage.  Memory  Mode  can  be entered only 

when it is your turn to move. 

7.1  Entering  Move  Sequences,  Referee 

Option 

lf  you  want  to  enter  individual  moves  or  a 

sequence  of  moves from  the initial  position or  any 

other  position  currently  on  the  board,  press  the 

MEM key once. 

.-, 

.-

,-, ,-, 

,: 

' ,_, 

Now  execute  the  desired  moves  tor  White  and 

Black on the chessboard. The computer won't start 

calculating  a  reply  to  any  of  these  moves.  Once 

you  have  reached  the  desired  position,  you  can 

leave  Memory  Mode  by  pressing  CL  and  resume 

playing  against  the  computer  from  the  current 

position with the colour that is to move. 

In  Memory  Mode  you  can  also  play  a  complete 

game against a human opponent.  In this case, the 

computer only acts as referee and checks whether 

the moves input by either side conform to the rules 

of chess. 

lllegal  moves  will  be  rejected  by  means  of  the 

display  "Err1"  and  a  tone  signal.  Return  the  piece 

you have just moved  to its  original square and then 

make a legal move. 

Memory  Mode  by  pressing  CL.  You  can  now 

resume  playing  against  the  computer  from  the 

position currently  on  the board  and  with  the colour 

that is to move. 

7 .3  Automatic take-back option 

Let's  assume  that you  have just  made a very bad 

move  and  realized  your mistake  immediately  after 

executing  it  on  the  board.  Naturally,  you now  teel 

the desire to retract that move. 

After  the  computer  has  announced  its  answering 

move  and  you  have  executed  it  on  the  board. 

there are two alternatives: 

1) You  can  enter  Memory  Mode  as  described  in

section 7.2  and take back  the last two half moves

of the game.

2) You  can  take  back  first  the  computer's  last

move  and  then  your  own  move  directly  on  the

chessboard, 

without  entering  Memory  Mode.  by

simply  carrying  them  out  in  reverse.  MEPHISTO"s

a�tomatic  take-back  facility  will  recognize  your 

w1sh  to  retract  these moves' and  pass  it  on  to  the 

program. 

However.  when  taking  back  a  longer  sequence  of 

moves,  your memory may fail  you.  so it is better to 

use the method described in section 7.2 in order to 

avoid  any mistakes. 

On  the  other  hand,  when  taking  back  only  a  tew 

7.2 Taking back move 

MEPHISTO's  interna!  memory  allows  you  to  play 

the current game backwards, either in its entirety or 

far  a few moves only.  Press the MEM key  to enter 

Memory  Mode while it is your tum  to move.  In  the 

display window you will see the message "memo". 

By  repeatedly pressing the input key  labelled  <-9, 

you  can  now  take  back  as  many  moves  as  you 

like.  Every  tirne  you  press  the  key,  there  will  be  a 

tone  signal,  the  corresponding  LEDs  will  start 

flashing  and  the  move  to  be  taken  back  will  be 

shown  in  the  display  window  with  three  dots 

between the characters. 

Execute  each  backward  move  by  replacing  the 

respective  piece  on  t�  square  it  originally  came 

from.  lf after doing so you observe that  one  of the 

LEDs is still flashing, this means that the move you 

have  just taken  back  was  a  capture  and  that  you 

need  to  restore  the  captured  piece  to  its  original 

square. 

18

Moves  that  have  been  taken  back  in  the  fashion 

described  above  may  be  played  forward  again  by 

repeatedly  pressing  the  key  labelled  ->0.  Again, 

the  moves  will  be  shown  both  in  the  display 

window  and  on  the  board  by  means  of  the 

corresponding  square  LEDs,  but  there  will  be  no 

tone signal. 

As  soon  as  you  have  reached  a  position  from 

which  you  would  like  to  continue  the  game,  leave 

moves,  the  automatic  take-back  option  is  to  be 

preferred,  since  it  allows  you  to  retract  moves 

without pressing any keys. 

7 .4  Replaying a game 

MEPHISTO's  interna!  memory  allows  you  to  go 

back  to  the  beginning  either  during  or  after  a 

game. 

Press  the  MEM  key  to  enter  Memory  Mode  and 

then  ENT  to  go  to the starting point  of  the  game. 

The display will change to this: 

Now you can replay the game move by  move from 

the  initial  position  by  repeatedly  pressing  the  ->O 

key.  As  soon  as  the  end  of  the  game  has  been 

reached. the following message will be displayed: 

.-

,: ,-, c, 

You  �an  leave  Memory  Mode  at  any  tirne  by 

pressIng CL. You may then resume ptaying against 

the  computer  from  the  position  currently  on  the 

board and with the colour that is to  move. 

19

Summary of Contents for MMV

Page 1: ...ne another There are copious cross references to supplementary material in other sections We recommend that you start out by going through the entire manual section by section once After having tt us obtained a general overview of the way your computer is operated you can make a more detailed study of specific points whenever the need arises And now we wish you lots of fun with your new electronic...

Page 2: ... six keys each that allow you to set all the necessary parameters and to access various items of information You are assisted in the handling of your computer by a four character seven segment display 6 function indicators the light emitting diodes or LEDs located above the keys and 64 square indicators one LED on each square of the chessboard The extensive explanations contained in this manual ar...

Page 3: ...making the capture on the respective square 3 3 Capturing en passant Execute the pawn move in the normal fashion The computer will then remind you to remove the captured pawn by flashing the LED on the square that it stands on lf you are not sure whether the rules allow an en passant capture please refer to the relevant chapter in any elementary chess course When castling you must always move the ...

Page 4: ...ffice tor you to know that even if one of these drawn positions is reached you can stil go on playing as lcfflg as you like 3 8 Starting or interrupting the calculation of a move Pressing the ENT key while it is your turn to move will start the computer calculating the next move in your stead Pressing ENT while the computer is analyzing will interrupt its current thinking process and cause it to p...

Page 5: ...a tournament game within the prescribed tirne limit of two hours the computer will repeatedly Here follows a descnption ot the d1fferent play1ng sound a warning tone and display the following 8 message C This means that strictly speaking you have now forfeited the game on tirne However it you wish to continue the game in spite ot that you are free to do so The 7 key Level 7 tournament level human ...

Page 6: ...computer must be given ample tirne far its calculations we recommend levels 6 or 8 10 Games played with the autoplay option may later be reviewed in Memory Mode The Automatic Play Option is accessed by pressing the LEV key 5 times IILI Vou can now enable this special option by pressing ENT The display will change to this _I_IL_I _ As soon as you leave Level Mode by pressing CL the computer will st...

Page 7: ...d moves it has found 5 5 6 Disable Opening Book With this option you can turn otf your MEPHISTO s extensive opening library or book The chess program then has no access to the opening theory stored in its memory and will start calculating moves on its own from move 1 It you want to disable your computer s op ning book proceed as lf you want to play Black against the computer proceed as follows Pre...

Page 8: ...TO s super iority and resign in your tum During the early pl ase of a game while the computer is stili playing its moves from its store of 14 opening theory or book the following message will be displayed instead of an evaluation _ You can leave lnformation Mode at any tirne by pressing CL 6 2 lnfo 2 Chess clock While the computer is analyzing the display normally shows only the tirne taken tor th...

Page 9: ...TO anticipates mate in 2 1 l l MEPHISTO RESIGNS CHECKMATE STALEMATE Patt in German J 16 position evaluation or if only a few opening moves have been made so far the theo message By pressing the key labelled O you can now cause the comment MEPHISTO wishes to make to appear in the display window In some positions it may be that MEPHISTO has more than one comment for you Theretore you should always p...

Page 10: ...so it is better to use the method described in section 7 2 in order to avoid any mistakes On the other hand when taking back only a tew 7 2 Taking back move MEPHISTO s interna memory allows you to play the current game backwards either in its entirety or far a few moves only Press the MEM key to enter Memory Mode while it is your tum to move In the display window you will see the message memo By r...

Page 11: ...ey The disptay will change to this J This means Do you really want to ctear the computer s interna board Confirm your intention by pressing ENT once more and the display will switch to the symbol tor the white king __ _ Briefly lift the white king from its square The corresponding square LED will start flashing and the coordinates of the white king s location will be shown in the display window un...

Page 12: ... as a travelling chess computer Finally we the MEPHISTO team wish you lots of tun with your new electronic chess partner Technical Data Microprocessor 65C02 ROM 32 KByte RAM 8 KByte Processor speed 4 9152 MHz Display 4 character Fits these units Modular Exclusive CE Munich Mobil LCD Thls lnstruction manual descri s the produd as ex acUy as poss1ble bul does not guarantee any specific property or s...

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