Sleep IGO(en) – Meta Technology

Overview

This app is a simple viewer specialized in replaying Go game records (kifu).

Top Bar
Displays player names (Black/White, ranks) and match information.
Tap to open the game list.
Board
Shows the current position being replayed.
Tap the center of the board to toggle play / pause.
Evaluation Graph
Displays the transition of evaluation values (only when enabled).
Toolbar
Contains Play / Pause and Settings buttons.
Depending on the situation, a “Back to Critical” button may appear.

Tap the player information in the top bar to open the game list.
Use the search field to filter records.
(Matches Japanese / English game titles, player names, event names, and file names.)
Tap a row to open the selected game.
The currently selected game is marked with a check icon.

Tap the board to toggle play / pause.
(A brief icon appears at the center to indicate the current state.)
The same operation is available using the Play / Pause button in the toolbar.

Overview
A graph showing the transition of board evaluation (win rate).
Definition of Win Rate
Win rates are calculated by AI (KataGo), assuming Black has a 6.5 komi.
Green Line
Represents the evaluation transition of the original game record.
Critical Points
Positions where the evaluation changes sharply (major turning points in the game) are marked.
Best Move Overlay
When “Play Best Moves” is active, the evaluation transition of the AI’s best moves is overlaid on the graph.

When the replay reaches a position after a critical point,
a “Back to Critical” button appears on the right side of the toolbar.
After tapping “Back to Critical”, choose one of the following:
- Play Best Moves
  Replays the AI’s best moves starting from the critical position.
- Play Original Game
  Returns to and replays the original game record.
If the evaluation graph is turned OFF, these critical-related buttons are not displayed.

After the game ends, the result is briefly shown,
then a “Proceed to the next game” modal appears.
Play Now
Immediately starts replaying the next game.
Stay Here
Remains on the current board position.

Sleep Timer
Specifies how long playback continues before the app (device) enters a suspended state.
Tap the screen to resume and continue playback.

Main settings include the following:

Random Selection
Selects the next game at random.
Auto Play on Load
Automatically starts playback when a game is loaded.
Playback Speed
Adjustable from 0.5x to 2.0x.
Sleep Timer
Sets the duration of continuous playback.
After the specified time, the app enters a suspended state.
Evaluation Graph
Toggles the evaluation graph on or off.
When turned off, critical-related buttons
(Back / Best Moves / Original Game) are also hidden.