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FeaturesMate Search Levels.OperationPlay LevelsPowerorder parts

Chess Champion 2150L(600-2254) Features Faxback Doc. # 31331

The Radio Shack Chess Champion 2150L is an advanced chess computer endorsedby world chess champion, Garry Kasparov. Your computer is a greatopponent, referee, and teacher. Special features include the following:

Display - shows the current positions of the pieces in case you accidentally disturb the chessboard, gives helpful messages, and lets you view a variety of special displays.

Sixty-Four Play Levels - give you 16 difficulty levels for standard play, 37 time-controlled play levels including several that simulate various types of tournament play, and 11 analysis play levels that let you learn from the computer's solutions to special chess problems.

Rule Enforcement - prevents illegal moves as you play against the computer or another person.

Opening-Book Memory - lets the computer respond more rapidly during the opening moves in a game.

Pause - lets you turn off the computer and continue the game later. With fresh alkaline batteries, the computer remembers information for the current game for up to 2 years.

Help - lets you ask the computer to suggest your next move.

Setup - lets you set up special chess problems.

Auto-Play - lets you learn by watching the computer play against itself.

Take-back/Replay - lets you take back and replay up to 50 moves.

Markers - lets you mark crucial points in a game so that you can take another look later.

Two Power Options - gives you the choice of powering the computer from internal batteries or a standard AC outlet. (AC operation requires an AC adapter).

NOTE: This computer's maximum Elo rating is 2150. Elo ratings have not been determined for individual play levels. In addition, it is not possible to give a meaningful comparison of the skill levels of the various play levels. In general, the computer is more powerful at the play levels that allow it to search longer.

BEFORE YOU BEGIN

This computer knows the rules of chess, including special moves such ascastling and capturing en passant. The computer might appear to playirregularly when it is actually obeying these rules.

If you are not familiar with the rules of chess, be sure you read thesupplied pamphlet called "Rules of Chess". If you need more information,your local library is sure to have several books about the subject.

Levels B8 and H1 through H8 are Mate Search Levels. The computer in theselevels is searching to see whether or not it can checkmate the playerwithin a set number of moves. Levels H1 through H8 check one to eightmoves ahead, respectively. B8 checks 16 moves ahead.

(IR/all-04/05/95)

(600-2254) Operation Faxback Doc. # 31332

Although it might take you months to fully explore all the features yourcomputer offers, you can begin using your computer within minutes.

Begin by following the steps in "Playing Against the Computer". Then, readthe rest of "Basic Operation" for more detailed information.

After you know how to start a game, enter moves, and read basic displays,refer to "Additional Features" for information about the computer's moreadvanced features.

NOTES: When you first turn on the computer, the play level is A3. We recommend you play at this level until you are familiar with the basic steps for using the computer. If you find this level too difficult or too easy, you can later change the level as described in "Play Levels".

Normally, you play the white pieces and the computer plays the black pieces. We recommend you play this way until you are familiar with the basic steps for using the computer. You can later change sides as described in "Changing Sides".

PLAYING AGAINST THE COMPUTER

Remove the chess pieces from the storage compartment on the back of thecomputer. To remove the compartment cover, press the latches in thedirection of the arrows. Be sure you replace the cover.

Then, follow these steps to play a game against the computer.

1. Place the chess pieces on the chessboard as shown. Be sure the white pieces are on the side near you (with the board turned so that the control names are right-side-up.

2. Press GO to turn on the computer.

3. Adjust the display contrast.

4. Press NEW GAME. The WHITE indicator lights to show that it is your move.

5. Select the piece you want to move, and press it down on its current square on the board.

Row/column indicators flash to indicate the piece you select.

After a few seconds, the display message shows the symbol and current coordinates for the piece.

NOTE: See "Chess Piece Display Symbols" to identify the symbols used on the display message.

6. Move the piece to its new position and press it down. The BLACK indicator flashes while the computer plans its move.

NOTE: During the opening moves of a game, the computer operates from its opening book memory, and indicates its moves almost immediately. The computer also plans during your turn, so it might immediately indicate a move even during the later moves of a game.

7. When the computer decides its move, row/column indicators light to show you which piece the computer wants to move. In addition, the display chessboard alternately flashes the piece's current and new positions.

NOTE: See "Chess Piece Display Symbols" to identify the symbols used on the display chessboard.

The display message also indicates the current position and new position coordinates.

Press down the indicated piece on its current square.

8. Row/column indicators show you where the computer wants to move the piece, and the display chessboard continues to alternately flash the piece's current and new positions. Move the piece to the indicated square and press it down.

9. Continue play until the game ends. See "End of Game Displays". Then, press STOP to turn off the computer.

Or, press STOPS to pause play. To later resume the game, press GO. Formore information, see "Pausing Play".

CHESS PIECE DISPLAY SYMBOLS

Use the following chart to identify the symbols the computer uses toindicate the chess pieces.

MORE ABOUT MOVES

Illegal Moves

The computer prevents illegal moves as follows:

If you make an illegal move, the row/column indicators for the piece'snew position flash, and the display tells you to clear the move.

Press the piece down on the indicated square. The row/column indicators for the piece's previous position flash. The display tells you to put the piece back.

Return the piece to the indicated square, and press down. The indicators turn off. You can now move this or any other piece.

If you do not correctly carry out the computer's move, the computercontinues to indicate the move it wants.

Capturing

To capture a piece, press down the capturing piece on its original square.Remove the captured piece from the board. Then, press down the capturingpiece on its new square.

Capturing En Passant

Capture en passant as follows:

1. Press down the capturing pawn on its original square. Then, press it down on its new square. The captured pawn's row/column indicators flash.

2. Press down the capture pawn, and remove it from the board.

Castling

Follow these steps to castle:

1. Press down the king on its current square.

2. Row/column indicators light for the king's new square. Press down the king on the indicated square.

3. The rook's row/column indicators flash. Press down the rook on its current square.

4. Row/column indicators light for the rook's new square. Move the rook to the indicated square, and press down.

Under Promoting

Under-promoting is declaring an advanced pawn to be something other than aqueen. Follow these steps to under-promote:

1. Press down the pawn on its current square and remove it.

2. Press the rook, bishop, or knight button to show what you want to promote the pawn to.

3. Press down the chosen piece on the new square.

When the computer under-promotes, the display message shows what piece itwants to promote the pawn to.

Pausing Play

The computer's memory holds the information for the current game even whenyou turn off the computer. With fresh batteries, the computer holds theinformation for up to 2 years. We recommend you conserve battery power byturning off the computer any time you stop the play.

To turn off the computer, press STOP. All indicators turn off. To resumeplay, press GO and proceed with play as usual.

End-Of-Game Displays

The computer recognizes check, checkmate, forced checkmate, and draw.

Check

When a king is placed in check, the following display appears:

PLAY (last piece moved) (last move) (check symbol)

Checkmate

When a game ends in checkmate during normal play, the WHITE or BLACKindicator lights to show which side is checkmated. When you take back andreplay moves, or any other time you press ANALYSIS and view the checkmatemove, the display shows End.

(Move #) (checkmate symbol) (last move) (end-of-game symbol)

Forced Checkmate

If the computer foresees that the selected side will place the opponent incheckmate, regardless of the opponents defense, the following displayappears during the winning side's turn.

(move #) (black to move) M (Forced checkmate symbol) (Moves to checkmate)

NOTE: At level B8, the computer searches for forced checkmate within 16 moves. At all other levels, the computer searches for forced checkmate within 8 moves

Draw

When a game ends in a draw, the following display appears:

(move #) (type of draw) (last move)

(600-2254) Play Levels Faxback Doc. # 37953

You can choose from 64 play levels.

When you play against the computer, you can select the standard play levelthat matches your level of skill. You can also select from numerous time-controlled play levels, including several that simulate tournament play.Some of the levels let you use the computer to analyze chess problems.

Selecting The Play Level

After you install batteries or reset the computer, the computer is at LevelA3. After that, the computer remains in the last selected level.

See the following for descriptions of the various play levels.

To confirm the current level, press LEVEL. Row/column indicators light toshow the selected level. To return to normal play, press NORMAL.

To change the level, do the following.

1. Press LEVEL.

The MODE indicator flashes orange, row/column indicators light to show theselected level and the display gives information on the selected level (seethe play level descriptions).

2. Repeatedly press + or - to light the row/column indicators for the de- sired level.

Or, repeatedly press TAB/COLOR to light the desired column indicator. Then, repeatedly press + or - to light the desired row indicator.

3. Press NORMAL to return to normal play.

NOTE: If you change the level while the computer thinks, press PLAY after

you return to normal play.

Standard Play Levels

When you play against the computer, select the level that best matches yourchess skills. There are eight novice and eight expert levels.

Novice (D1-D8)

At levels D1-D8, even beginners have a chance to win. The computer makescommon beginner's mistakes, such as leaving pieces unprotected, failing tocapture unprotected pieces, or capturing pieces at the expense of leavingits king unprotected. At higher novice levels, the computer makes fewermistakes.

Level D1 is the easiest level.

When you select one of the novice levels, the following display appears.

Hand, L3

Expert (A1-A8)

At levels A1-A8, the computer plays like an experienced player. At higherexpert levels, the computer uses better tactics, looks ahead more moves,and considers more possibilities.

As the level increases, the computer takes longer to plan its moves. Thefollowing chart shows the average response times for levels A1-A8. (Remem-ber that these are averages. During a game, response times are often muchshorter or longer.)

LEVEL AVERAGE RESPONSE TIME PER MOVE

A1 1 secondA2 2 secondsA3 5 secondsA4 15 secondsA5 30 secondsA6 1 minuteA7 2 minutesA8 3 minutes

When you select one of the expert levels, the following display appears.

1:00: 1 L <-- Level Symbol | | | Moves | Response Time

Tournament Play Levels

Each of these levels simulates a type of traditional or modern tournamentplay.

Traditional (B1-B5)

At levels B1-B5, the computer enforces the time limits of one of the tradi-tional tournament types.

Each level has a primary and secondary time control, as shown in the chartbelow. For example, at Level B5, each player must complete at least 50moves within the first 2 1/2 hours of play. After that, each player mustcomplete at least 20 moves every hour. If a player fails to complete the

minimum number of moves within the time limit, that player loses.

The computer adds the time remaining from a previous time control to thatplayer's next time control. For example, at Level B5, a player that com-pletes the first 50 moves in 2 hours has 1 1/2 hours to complete the next 20moves. The computer accumulates the time remaining for each time controluntil the end of the game.

The following chart shows the primary and secondary time controls for eachtraditional tournament level.

NOTE: The computer maintains these times internally, but the normal display does not show the clock. To learn how to view the time remaining in the current time control, see "Remaining Time" under "Viewing Special Displays".

PRIMARY SECONDARYLEVEL DESCRIPTION TIME CONTROL TIME CONTROL

B1 Club 30 Moves/30 Minutes 30 Moves/30 MinutesB2 International 40 Moves/2 Hours 20 Moves/1 HourB3 Grandmaster 40 Moves/2 1/2 Hours 16 Moves/1 HourB4 Fast 45 Moves/1 1/2 Hours 15 Moves/30 MinutesB5 U.S.Open 50 Moves/2 1/2 Hours 20 Moves/1 Hour

When you select a traditional tournament level, the following displayappears.

0:30:30 L 0:30:30 | | | | | | | Moves | | Second Time Limit | Moves First Time Limit

Modern (C1-C8)

Some modern tournament forms (sometimes called sudden death) allow an un-limited number of moves but set a limit on each player's total play time.If a player uses all of the allocated time without checkmating the opponentor ending the game in a draw, that player loses.

When you select one of these levels, the display gives the time limit forthat level, as shown in the following example. (99 shows that there is nolimit on the number of moves.)

L 0:05:99

The following chart shows the time limit for each level.

LEVEL TIME LIMIT

C1 5 minutesC2 7 minutesC3 10 minutesC4 15 minutesC5 20 minutesC6 30 minutesC7 60 minutesC8 90 minutes

Other Time-Controlled Levels (E1-E8, F1-F8, G1-G8)

These levels are similar to the traditional tournament levels. The follow-ing chart shows the primary and secondary time controls for each level. Formore information, see "Traditional (B1-B5)" under "Tournament Play Levels".

PRIMARY SECONDARYLEVEL TIME CONTROL TIME CONTROL

E1 20 moves/30 minutes All remaining moves/30 minutesE2 20 moves/30 minutes Same as PrimaryE3 20 moves/40 minutes Same as PrimaryE4 25 moves/60 minutes Same as PrimaryE5 30 moves/45 minutes Same as PrimaryE6 30 moves/45 minutes All remaining moves/30 minutesE7 30 moves/60 minutes Same as PrimaryE8 30 moves/70 minutes Same as PrimaryF1 30 moves/75 minutes Same as PrimaryF2 30 moves/80 minutes Same as PrimaryF3 30 moves/80 minutes 10 moves/30 minutesF4 30 moves/100 minutes Same as PrimaryF5 35 moves/90 minutes All remaining moves/15 minutesF6 40 moves/40 minutes 20 moves/20 minutesF7 40 moves/60 minutes 20 moves/30 minutesF8 40 moves/80 minutes 20 moves/40 minutesG1 40 moves/90 minutes 20 moves/45 minutesG2 40 moves/100 minutes 20 moves/50 minutesG3 40 moves/105 minutes All remaining moves/15 minutesG4 45 moves/120 minutes 23 moves/60 minutesG5 50 moves/90 minutes 25 moves/45 minutesG6 50 moves/100 minutes 25 moves/50 minutesG7 50 moves/120 minutes 25 moves/60 minutesG8 60 moves/60 minutes 30 moves/30 minutes

Analysis Play Levels

These levels let you use the computer to solve special chess problems.

You can set up problems such as those you find in chess books and newspapercolumns. (See "Setting Up Special Situations.") Then, you can select oneof these levels and let the computer solve the problem.

You can also enter one of these levels to get advice during a game.

Using an Analysis Play Level

Follow these steps to use one of the special analysis play levels.

1. Select the level as described in "Selecting the Play Level."

Descriptions of the analysis play levels follow these instructions.

2. Press PLAY. The color indicator flashes as the computer plans the move.

3. When the computer indicates the move, make the move as usual.

To return to a standard play level, follow the steps in "Selecting the Play Level."

One-Hour Search (B6)

When you select Level B6, the computer spends 1 hour planning the next movefor the selected side. At the end of the hour, it suggests the move, basedon the research it has done up to that point.

NOTE: The computer indicates a move sooner if it finds the move in its opening-book memory, finds a forced checkmate, fully searches to a depth of 16 ply, or runs out of memory before the hour is up.

When you select Level B6, the following display appears.

1:00:1 L <--Level Symbol

Maximum Depth Search (B7)

At Level B7, the computer plans the next move for the selected side untilyou press PLAY. You can let the computer spend hours or even days planninga move.

NOTE: The computer indicates a move before you press PLAY if it finds the move in its opening-book memory, finds a forced checkmate, fully searches to a depth of 16 ply, or runs out of memory.

When you select Level B7, the following display appears.

9:59:1 L

Fixed Depth Search (H1-H8)

At Levels H1-H8, the computer searches ahead a specific number of movesbefore deciding on its next move. For example, at Level H8, the computerlooks ahead eight moves (including the possible response to each move).

When you select one of these levels, the display shows how many moves aheadthe computer searches at the selected level. For example, the followingdisplay appears for Level H6.

F.6 L

Searching for Forced Checkmate (B8)

When you select Level B8, the computer determines whether the selected sidecan checkmate the opponent's king within 16 moves, regardless of the oppon-ent's defense.

When you select Level B8, the following display appears.

Probl L

(600-2254) Power Faxback Doc. # 31333

CONNECTING TO POWER

INSTALLING BATTERIES

You can power the computer from six C batteries. We recommend alkalinebatteries, such as Radio Shack Cat. No. 23-551.

Follow these steps to install batteries.

CAUTION: When you replace batteries, install the inside row of batteries within 10 seconds after removing the old ones. Otherwise, you lose the information for the current game.

1. If you are replacing batteries, press STOP to turn off the computer.

2. Remove the battery compartment cover by pushing the latch in the diretion of the arrow.

3. Install the batteries, as indicated by the diagrams inside the compartment.

4. Replace the cover.

5. The first time you install batteries, press STOP to turn it off. Then,

press and hold down PLAY and press GO. This initializes the computer.

The indicators alternately light as the computer runs a brief self-test. Then, the WHITE and MODE indicators light.

A fresh set of alkaline batteries provides about 100 hours of playing time.Replace the batteries when the display becomes dim or the sound becomesweak.

USING AN AC ADAPTER

To conserve battery power, you can power the computer from a standard ACoutlet. This requires an optional adapter, such as Cat. No. 273-1455.

CAUTIONS: You must use an AC adapter that supplies 9 volts and delivers at least 150 milliamps. Its center tip must be set to negative, and its plug must correctly fit the computer's 9VDC/150 mA jack. Using an adapter that does not meet these specifications could seriously damage the computer or the adapter. We recommend you install the batteries even if you plan to power the computer with an AC adapter. This protects the information stores in the computer's memory in case the AC power fails or you unplug the the adapter. See "Installing Batteries".

Follow these steps to use AC power.

1. Press STOP to turn off the computer.

2. Plug the adapter's barrel plug into the computerr's 9VDC/150 mA jack.

3. Plug the adapter's other end into a standard AC outlet.

CAUTION: Press STOP to turn off the computer before you unplug the adapter from the outlet or computer. This helps protect the information stored in memory.

To order parts call 1-800-843-7422 or visit your local RadioShack store.

Reference # Cat.No. Description NP Part #------------------------------------------------------------------------ 11318524 BLACK/SILVER BAND AXIAL 1N4001 11318615 ORG GLASS W/BLK BAND AXIL 1N4148 11319001 1N5229B 11319340 REPLACED BY DX-0162 1N60 11319373 1N60P REPLACED BY 8550 1TR0115 10520922 REPLACED BY 8550 1TR0897 11377934 REPLACED BY 1TR0897 8550 USE B2300871 B2300551PK 28 10553477 BUZZER,D1A27MM BC0063 X1 10596187 RESONATOR,16 MHZ 50 PPU CX1202 10596187 AFTER DATE CODE 11A4 CX1202 17 10601854 DOOR,PIECE HIPS PLASTIC DA0541 10601854 COMPARTMENT DA0541 10609832 LID,BATT HIPS PLSTC BLK DB0910 10621712 REPLACED BY 1N4001 DX0007 10621795 REPLACED BY 1N4148 DX0022 10622173 REPLACED BY 1N60 DX0161 10622181 REPLACED BY 1N60P DX0162 49 10670271 CLAMP,SENSOR LARGE HC2004 10685204 PACKAGE SIZE 29/16 PIECES HC5716 21 10699791 RUBBER,CONDUCTIVE YO1G HJ0184 10699791 MAKES CONTACT WITH PCB HJ0184 5 10700888 CONTACT,BATTERY A HJ0298

27 10740611 CONTACT,BATTERY (+) JE0313 26 10740629 CONTACT,BATTERY (-) JE0314 44 10745040 CONNECTOR,ZEBRA SG JE1913 10745040 BOARD JE1913 31 10768323 KNOB,VOLUME BLACK PLASTIC K2871 10768323 CAP K2871 23 10789089 KEY TOP,LARGE PLASTIC KC0270 10789089 FOR FUNCTION (15 PCS) KC0270 22 11623147 KEY TOP SMALL PLASTIC KC0271 11623147 FOR CHESSMEN(6 PCS) KC0271 1-8 10796613 LED,2X5MM RED RECTANGLE LA0028 LED A LED B LED C 10796613 FOR 1-8,A-HAND COLORS LA0028 LED D LED E LED F 10796613 ON FRONT PANEL LA0028 LED G LED H 1-6 10796613 LA0028 43 10797967 LED,DUAL COLOUR LA0206 10797967 PANEL LA0206 46 10800746 LCD, CHESSBOARD LB0120 10800746 LB0120 10833523 MANUAL,SERVICE 60-2254 MS6002254 10860567 MANUAL USERS PHOTO COPY MU6002254 U2 10897890 IC, LM2931AZ-5.0 MX4589 10897890 MX4589 U1 10901866 IC HD6433258P8 DIP64 T MX5500 10901866 MX5500 U4 10901874 IC 15002F FP80 S LCD DRIV MX5502 10901874 80 PIN FLAT PACK MX5502 VR1 10980407 POT,SLIDE VOLUME 50KB PA0414 10980407 4 PINS PA0414 11 11048071 ACTUATOR, SWITCH PIN RS0059 11048071 BLACK PLASTIC RS0059 273-1455 W0000X 11149796 PCB ASSY,LED XB3595 11149804 PCB ASSY,COMMAND XB3596 11149812 PCB ASSY,RFI XB3597 1 11199569 CABINET ASSY,TOP Z4380 2 11199569 CONSISTS OF: Z4380 29 11199569 PANEL PLASTIC HIPS BLACK, Z4380 30 11199569 SENSOR CHESSBOARD COMBO, Z4380 32 11199569 OVERLAY CHESSBOARD COMBO, Z4380 33 11199569 INLAY FOR RATING BLACK, Z4380 34 11199569 INLAY LCD CONTRAST DIM, Z4380 9 11199569 INLAY LCD CONTRAST BRIGHT Z4380 11199569 NAME PLATE AL RADIO SHACK Z4380 14 11199577 CABINET ASSY,BOTTOM Z4383 15 11199577 CONSISTS OF: Z4383 16 11199577 BATTERY LID BLACK PLASTIC Z4383 17 11199577 PIECE DOOR BLACK PLASTIC Z4383 19 11199577 EPROM COVER BLACK PLASTIC Z4383 11199577 SPONGE 60X40X3MM Z4383

(This list was generated on 11/12/2004)