FIFO stands for "First-In, First-Out." You can train your memory and also oblivion. Train your capability of oblivion to forget useless things and memorize a lot of important things!

Symbol Button Layout Display Sample Difficulty Note O/X

1

This is a built-in symbol for novice players.

Digits

5

This is a built-in symbol using digits which are comparatively easy to memorize. Medium grade. Marks

10

You may confound triangles and rhombi in your memory. Dogs

(C) Tomoko

6

The capability of quick distinguish is required. Sounds1

8

It may be difficult if you can't read scores.

Sounds2

14

The capability to recognize musical notes by listening is required. Sounds3

13

This is more difficult than Sounds1 as chromatic seminotes are included. Sounds4

19

If you are a perfect-pitch person, you should try this. GoGame1

7

You must be confused, though this has only four varieties.

GoGame2

13

I don't know how to memorize this.

Symbol Button Layout Display Sample Difficulty Note Dices1

6

Dice has only six sides, but 2, 3 and 6 spots have two different orientations. Dices2

9

Even if you remember it is a deuce, which orientation of spot is it? NFlags

12

There are similar flags and similar names. Those must make you confused. Arrows

5

It seems to be easy at a glance, but ... Iroha

6

These are Japanese Hiragana characters. These must be seen just as graphics for you. ABC

5

Alphabets. There are 26 varieties, but this symbol is relatively easy. Morse1

10

Morse code. Codes are displayed with the beep sound. Morse2

18

You have to figure out the alphabets by listening the beep sound. Braille

10

Braille alphabet. This is easy if you master Braille. EEggs1

6

Easter Eggs. All eggs have same shape. Weather

11

Weather mark. Some are composed of two marks. Symbol Button Layout Display Sample Difficulty Note BBalls1

11

Billiard balls. It will be difficult to memorize two-digit numbers. BBalls2

13

Billiard balls. Some balls don't show the number. Curling

9

Curling stones. You may be able to memorize the colors, but must forget the angles. Landolt

17

Landolt ring. You may be able to handle it if it is in one column. 3.1.0 (06/02/04):

• Symbol list sort
• Preference setting such as turning off sounds for correct answers
• Bundled 14 extra symbols

3.2.0 (05/07/06):

• Increased bundled extra symbols to 18

3.3.0 (06/17/07):

• Increased bundled extra symbols to 20
• Fixed minor bugs

3.4.0 (12/29/08):

• Increased bundled extra symbols to 23
• Support drawing images in button area