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EXCALIBUR E108 Einstein Brain Station User Manual

Page 14

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14

5.3 S

UMS

The display shows an arithmetic problem.

Use the number keys to type the answer

from left to right, then press ENTER.

A rising or falling sequence of notes tells

you whether you are right or wrong. Then

the next problem appears. After a series of

10 problems, the computer displays your

score.

5.4 N

UMBER

S

QUARES

Your task is to insert the numbers 1-9

into the vacant spaces, in such a way that

the horizontal and vertical sums give

the correct totals. Each number can be

inserted only once.

To insert a number: bring the cursor to the

appropriate square using the arrow keys,

then press the number key.

Numbers already entered can be

“overwritten”. The number in the cursor

square can be erased with CLEAR.

NB: You may “lock” a number (with

ENTER), retract and repeat a series of

entries (using UP/DOWN ), and store

“candidate numbers” (using NOTE).

These features are also used in Su Doku;

they are fully described in § 6.1.2.

6 LOGIC PUZZLES

6.1 S

U

D

OKU

6.1.1 O

BJECT

AND

METHOD

The 9x9 grid is subdivided into nine

“boxes” of 3x3 squares each. At the start

of a puzzle, some of the squares contain

numbers. This example is on Level 5:

The idea is to fi ll the empty squares with

numbers (1-9), in such a way that each

number occurs once in each horizontal

row, once in each vertical column, and

once in each 3x3 box. Here is the solution

to the above puzzle:

To play, bring the cursor to a vacant

square using the arrow keys, then press a

number key to insert the number.

Numbers already entered can be

“overwritten”. The number in the cursor

square can be erased with CLEAR.

4 6 8 2 7 9 1 3 5
5 1 9 8 3 4 2 6 7
7 2 3 1 5 6 8 9 4
8 4 5 9 2 1 3 7 6
9 3 6 5 8 7 4 2 1
2 7 1 4 6 3 5 8 9
6 5 7 3 1 8 9 4 2
1 8 4 6 9 2 7 5 3
3 9 2 7 4 5 6 1 8

7 9 1

5

1

8

2

2 3

6 8

8

9

3 7

9 3 6

4

9

1

4

8

2

4 5 6