A Master of Go

powered by that neural network

6.2.1 for iPhone, iPad
$12.99
8.9

14 Ratings

Update Date

2023-06-17

Size

615.8 MB

Screenshots for iPhone

iPhone
A Master of Go Description
It is a Go AI featuring a neural network of that strong, open source AI. Leela Zero, ELF OpenGo, PhoenixGo, Minigo, SAI, and optionally KataGo!

You can use it as a strong opponent, and as a good teacher at the time of study.

With M2 processor of iPad Pro, the playouts are performed over 650 times per second with ELF OpenGo weight v1, and with A15 Bionic processor of iPad mini, over 200 times per second! Both exceed notebook computers and is comparable to desktop computers. With M2 processor of iPad Pro, the playouts are performed over 250 times per second with KataGo b18c384nbt!
Other famous weights are also included.

For your information, the playout speed on the iPad Pro 9.7 inch model(A9X processor) will be about 10 times per second, and the one on the iPhone 6(A8 processor) will be about 1 time per second. I think that even so it is stronger than most amateurs, but I am sorry that patterns of misreading ladders will increase.
Please be careful when considering purchasing.

Enjoy it!
A Master of Go 6.2.1 Update
2023-06-17
This is a bug-fixed version.

1. fixed a bug that situation bar and charts were not updated when playing with KataGo.
More Information
Price:
$12.99
Version:
6.2.1
Size:
615.8 MB
Update Date:
2023-06-17
Developer:
Yuji Ichikawa
Language:
Chinese English Japanese Korean

Safe to Download

AppPure.com and the download link of this app are 100% safe. The download link of this app will be redirected to the official App Store site, thus the app is original and has not been modified in any way.

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6.2.1 2023-06-17
This is a bug-fixed version.

1. fixed a bug that situation bar and charts were not updated when playing with KataGo.
6.1.1 2023-05-01
This is a bug-fixed version.

1. fixed a bug that the app crashed when no variations.
5.15.4 2021-11-10
This is a bug-fixed version.

1. fixed a bug that the app crashes when reading an SGF file. This issue was introduced in the version 5.15.3 by the mistake of refactoring.
5.15.2 2021-09-26
This is a bug-fixed version.

1. fixed a bug that the app crashed on A14/A15 devices with iOS/iPadOS 15 when you use batchSize more than 2.
5.9.0 2020-11-06
This version supports A14 processor.

1. fixed a problem that KataGo weights did not run on Neural Engine in A14 processor.
2. updated Leela Zero weight to #279.
3. updated SAI weight to #534.
4. supports automatic download of SGF files in iCloud Drive.
5.8.0 2020-10-07
This version is a minor update.

1. fixed a bug that an SGF did not be copied by "Copy" button in share menu on iOS 14/iPadOS 14.
2. added purple markers for highest policy candidate in study mode.
3 added a setting of analysisWideRootNoise for KataGo engine.
4. updated the weight of Leela Zero to #277.
5. updated the weight of SAI to #502.
6. changed "American rule" as aga-button, which includes pass stone.
7. tuned KataGo engine a little.
5.7.0 2020-09-22
This is a bugfix version for iOS 14/iPadOS 14.

1. fixed a serious bug that KataGo engine did not work on iOS 14/iPadOS 14 for processors without Neural Engine.
2. updated KataGo engine to v1.6.1. Note that you cannot use previously downloaded KataGo weights.
3. extended support of ten-key pad. Now "." toggles suspend/resume of search, "," and "0" toggle main/variation display, and pagedown/pageup slide charts.
5.5.0 2020-06-22
This is a weight updated version.

1. Finally added 40b KataGo weight (g170-b40c256x2-s5095420928-d1229425124).
2. updated 20b KataGo weight to g170e-b20c256x2-s5303129600-d1228401921.
3. increased selectable rules for KataGo.
4. fixed a bug that the displayed rule was wrong when using the default engine and importing an SGF.
5.3.0 2020-05-12
This is an improved version.

1. updated KataGo b20 weights to g170e-b20c256x2-s4384473088-d968438914.
2. added a new feature that situation charts can be switched between winrate and score when using KataGo.
3. fixed a bug that the board keeps zoomed even after returning full screen from splitview.
5.1.2 2020-04-29
This is a version which fixed a bug that the app may crash when purchasing an item failed.
5.1.1 2020-04-24
This is a bug fix version.

1. Updated KataGo weight to g170e-b20c256x2-s3761649408-d809581368. A little faster with A12 and later processors.
2. Improved the speed of 9-grid weight KataGo G170e_b10c128 significantly with the A12 or later processor.
3. Fixed a bug that the next move marker was not correct when backing in study mode.
4. Displayed all next moves as markers in study mode.
5. Interprets "Old Chinese" of SGF RU property as "stone-scoring" rule for KataGo engine.
6. Fixed a bug that PL property is not reflected when undoing when reading SGF with PL property.
7. Fixed a bug that the numerical value of the situation bar might be wrong when loading SGF with PL property.
8. Fixed a bug that the app crashes when a user operated the game conditions hurriedly in the main menu.
5.0.9 2020-03-17
This is a minor-improved version.

1. updated Leela Zero weight to #270.
2. updated KataGo weight to g170e-b20c256x2-s2971705856-d633407024.
3. improved search after undo/back/rewind for KataGo.
4. fixed a bug that search information of initial position of handicapped game in study mode for KataGo was wrong.
5. updated KataGo engine to v1.3.3.
5.0.8 2020-03-11
This is a minor modified version.

1. updated Leela Zero weight to #269.
2. improved memory usage when using the default engine.
3. fixed a bug that setting "Max time per position(sec.):" to finite time cause unintentional pauses when using KataGo.
4. added additional stroke color in study mode when using KataGo.
5. displayed current estimated score in situation bar when using KataGo.
6. made "Batch Size" setting effective for KataGo.
5.0.7 2020-03-06
This is an urgent bug-fixed version.

This fixed that the previous version (5.0.6) failed to start on iOS 12 or earlier.
5.0.5 2020-02-18
This is a bug-fixed version.

1. fixed a bug that the app crashed when trying to play 9 or 13 grid game by KataGo.
2. fixed a bug that selecting a ruleset was not reflected for "Start Game".
3. fixed a bug that "minigo v17" helper did not work in "DL weight from" field.
4. fixed a bug that putting an invalid URL in "DL weight from" field and type enter key caused app crash.
5.0.4 2020-02-15
This is a bug-fixed version.

1. updated Leela Zero weight to #264.
2. fixed a bug that the rule was not set when loading a SGF file and alerting about the rule.
3. fixed a bug that doing backing or rewinding a pass move caused inconsistency between display and KataGo engine.
4. fixed a bug that changing a handicap after changing a grid caused app crash.
5. hopefully modified Korean localization.
5.0.3 2020-02-02
This is a bug-fixed and weight-upated version.

1. updated KataGoG170_b20c256x2 to g170-b20c256x2-s1913382912-d435450331.
2. fixed a bug that suspending and resuming KataGo engine did not work.
3. changed notation of "percentage points" from "pts." to "%pt" for clarification.
4. fixed a bug that game conditions were not effective after changing an AI engine.
5.0.2 2020-01-28
This is a minor improved version.

1. changed to show the numerical value of the information of the first 10 candidate moves in the study mode.
2. added support for downloading KataGo weights. Now you can download b15c192 weight.
3. salvages an SGF when crashing not only in game mode but also in study mode.
5.0.1 2020-01-25
This is a bug-fix version.

1. updated KataGo 20b weight to v1.3.1-nets.
2. updated Leela Zero 40b weight to #261.
3. supports ruleset tag in SGF file for KataGo
4. fixed a bug that next move indicator was not displayed when next move was not in candidates.
5. fixed a bug that coloring of candidates was slightly inconsistent.
6. fixed a bug that the app crashed when starting study after a game ended by sequential passes.
7. fixed a bug that the app crashed when opening a file in a state that an alert was presented in the app.
5.0.0 2020-01-23
This version is a major update especially for users unlocking KataGo.

1. KataGo v1.3, which is stronger than v1.2 and supports Japanese rule, Chinese rule as well as Tromp-Taylor rule.
2. updated Leela Zero weight to #259.
3. improved to display only infos of important candidates in study mode.
4. shows actual next move when exists in study mode.
5. fixed a bug that variation length is limited to 9 for KataGo.
6. fixed a bug that search cache was not cleared after undo for KataGo.
7. fixed a bug that stop button was not functional after opening an illegal sgf file.
4.0.6 2020-01-15
This is a bug-fixed version.

1. fixed a bug that playouts were limited upto 1000 when you play with KataGo.
2. fixed a bug that game status were not reset when starting a game.
3. improved synchronization of displayed status of purchase button.
4. updated Leela Zero weight to #258.
4.0.5 2019-12-28
This is a bug fixed version.

1. fixed a bug that the main menu modal did not open at start up when unfinished transaction of purchasing existed.
2. added an indication at in-app store when waiting for an approval for family sharing.
3. added a log functionality for unfinished transaction.
4. updated Leela Zero weight to #257.
4.0.4 2019-12-19
This version fixes a few bugs.

1. fixed a bug that the app froze by using hardware cursor key when the engine is suspended.
2. fixed a bug that the engine was terminated abnormally if you start a game or a study without changing a weight after changing a size of board.
3. fixed a bug that the app crashed due to a lack of memory when using KataGo.
4. fixed a bug of memory leak of neural network part of KataGo.
5. KataGo weights now support "symmetries" feature.
3.11.0 2019-11-14
This version is optimized for iOS/iPadOS 13.

1. PhoenixGo v1 weight for iOS/iPadOS 13 is now available. Please see https://github.com/new3Rs/a_master_of_go.
2. updated Leela Zero weight to the latest one (#250)
3.10.0 2019-10-01
This is a workaround version for iOS 13.

1. supports dark mode on iOS 13.
2. fixed a bug that the app crashed when there were no time to search a child node at game mode.
3. fixed a bug that the app might crash when batch size > 1.
4. fixed a bug that "Disable idle timer while charging" setting was not checked at startup.
5. fixed a bug that Coin Store did not open on iOS 13.
6. improved English localization.
3.9.1 2019-09-03
This version fixes a bug that study mode does not work.
I am sorry for this terrible bug.
3.9.0 2019-09-02
This version introduces two new features.

1. introduces "Pair Go with AI" mode. In this mode, AI will play at third, fourth, seventh and eighth moves and so on.
2. includes The latest Leela Zero weight (#242). (ELF v2 and Phoenix v1 weights are alternatively removed.)
3. fixes a bug that the app crashes when pasting content of invalid text file.
3.8.0 2019-08-28
This version improves SGF support for Japanese character encoding.
3.7.4 2019-08-24
This version fixes a terrible bug of the AI engine.
Search result becomes stranger move by move.
Technically virtual loss of MCTS nodes were not restored when terminating.
3.7.3 2019-08-06
This is a bug-fixed version.

1. fixed a bug that the "scale" button did not work after odd number times rotations.
3.7.2 2019-07-24
This is an improved version.

1. There were cases that scoring was not correct even if finished game. tries possibly more accurate calculation.
3.7.0 2019-07-22
This version changes the following two points.

1. Legacy UI for viewing variations is now optional. Please check settings menu.
2. The AI engine architecture is largely modified.
3.6.1 2019-07-12
It was reported that the app crashed at startup on some device (iPhone 8 Plus with IOS 11.2.1).
This is a workaround version.
3.5.0 2019-06-11
This version is a minor modified version.

1. added an option setting to display coordinate labels.
2. changed the default weight from Leela Zero 15b to Leela Master GX89. You will enjoy handicapped games on 19x19 board more. If you want to use Leela Zero 15b, you can download it. See https://github.com/new3Rs/a_master_of_go.
3. modified the use of transposition table. Now nps means nodes per second instead of previous evaluations of neural network per second.
3.4.1 2019-05-27
This version enables to download weight via not only static URL but also dynamic URL.
3.4.0 2019-05-21
This version adds a few new features and fixed several bugs.

1. new feature: Bar chart of numbers of visits in study mode
2. new feature: supports minigo weight. See https://github.com/new3Rs/a_master_of_go.
3. Leela Zero 15b weight is updated (3d77)
4. improved ladder problem a little.
5. fixed a bug that the app may crashes repeatedly when purchasing coins failed.
6. fixed a bug that the app freeze when returning the same position.
7. fixed a bug that the app crashed when pasting SGF from an other device. It also fixed a bug that the app could not resume normally on iPhone 7P or iPhone 6.
3.3.0 2019-05-11
This version is minor modified version.

1. shows an error message when the app fails to retrieve items for in-app purchase.
2. shows the name of weight which the AI is currently using.
3.2.0 2019-05-09
This version is a minor modified version.

1. updated Leela Zero 15b weight.
2. fixed a bug that the AI ran away when reaching a previous position.
3. improved prediction of unevaluated values.
3.1.0 2019-04-23
This version is a minor version to change the followings.

1. discounts price of coins. (You will get double coins at the same price.)
2. added two options to save battery in study mode
3. fixed a bug that the app did not show variation after a search had stopped by timer in study mode
3.0.0 2019-04-18
It is the third major version upgrade!

1. Supported a board of size 9
2. Enabled to try a board of size 13
3. Enabled to try 4-stone and 5-stone handicap games on a board of size 19
4. Enabled to select on/off of showing the winrates
5. Enabled to download weights of neural network on the Internet
6. Fixed a bug that can not read SGF on iCloud Drive
7. Fixed a bug that the scoring popover was misaligned and was cancelled immediately after rotating by odd number of times
8. Updated Weight of 15 Blocks for a board of size 19
9. Fixed a bug of landscape layout on iPhone XS Max / XR
10. Fixed a problem with autoscroll when the keyboard appeared
11. Fixed a bug that was able to play a move on a prohibited intersection
2.2.1 2019-03-16
This version is a bug-fixed version.
I am sorry that the previous version has a serious problem that AI's plays are too random when you play handicapped game.

1. fixed a bug that keeping stochastic even if you set stochastic opening off.
2. restored the algorithm of "stochastic opening" to the old one.
3. changed the default of "stochasitc opening" off.
2.2.0 2019-03-13
This version adds a new neural network and an instant parameter setting, and modifies several issues.

1. Added the Tencent PhoenixGo network.
2. Added Instant Parameter Setting functionality to match engine parameters to famous AIs.
3. Made "Stochastic Opening" stochastic even when the number of playouts was small.
4. Modified the condition to resign at handicapped game.
5. Modified the condition for “admiration”.
6. Improved playout speed when there are many stones.
7. Fixed a bug that did not extend the reading when the AI ​​plays first.
8. Modified the UI of the scroll parts.
2.1.0 2019-03-02
In this version, we added some functionalities and fixed bugs.

· added a time-extension functionality and functionalities to display the primary variation as progress in game mode. You can check the progress of the ladder reading, and in some cases AI may avoid a mistake of ladder.
· made the algorithm closer to AlphaZero's. Please change Cinit to half if you changed it since it means twice of the one of the previous version now.
· fixed a bug that there were cases that AI did not capture a large stone-string with false eye in atari.
- fixed a bug that "Paste SGF for Game" did not work with a SGF of a handicapped game.
- fixed a bug that you could not set byoyomi due to soft keyboard on iPhone 6 etc.
- fixed a bug that PV mode kept after play / back in study mode.
- fixed a bug that the tool bar for viewing was displayed on Go board in the landscape of iPad.
2.0.0 2019-02-16
Major version up at last!

- added scoring function. (You need virtual coins to use it since this is a server-side functionality. You will get free 10 coins initially for trials.)
- added ELF OpenGo weight v2.
- updated Leela Zero 15-block weight.
- added the judgment functionality as bad and admirable moves in study mode.
- added the functionality to make idle timer off. You can let the app read long time.
- added stochastic opening mode in game mode.
- improved UI variously, for instance, magnifier UI.
1.5.0 2019-01-16
This version improved magnifying Glass UI and fixed several bugs.
- Possible largest magnifying glass
- Magnifying glass for slide over and split view on iPad
- fixed a bug that weight selection was reset unintensionally
- fixed a bug that no resigns did in self-play
- fixed a bug that the app crashed because the engine did not treat ending by passes properly
- fixed a bug that the app crashed because hash was wrong
1.4.0 2019-01-14
This version supports handicap games and a lightweight neural network is newly added.
- supports handicap games up to 3 stones though komi is 7.5
- supports a new weight with 15 blocks, which reads ladders a little better
- fixed a bug that the app crashed when the user plays a pass in the condition of battery-saving off and multi-threaded
1.3.0 2018-12-18
This version changed AI algorithm a little and provides you several changeable setting items.
- changed AI algorithm a little
- auto save of game settings
- New sound setting and auto save
- New parameter settings of AI engine and auto save
- fixed a bug that the app could not load SGF with a pass
- improved Simplified Chinese
- supported Traditional Chinese
1.2.2 2018-12-11
This version enables to cancel AI's move in game mode, and fixes a bug that the study toobar may not appear when a file is copied into the app.
1.2.1 2018-12-10
This version fixed a bug that move numbers in variation may be wrong.
1.2.0 2018-12-08
Forward and rewind buttons were added.
1.1.2 2018-12-03
We are sorry that the version 1.1.1 introduced a new bug that you could not see variations in study mode.
This version will fix it.
1.1.1 2018-12-02
This version is for bugfix and some little improvements.
Thank you for reporting the issues!

bugs fixed,
- failed to restart AI after running out maximum nodes
- played a move unintentionally while a modal is shown and the app was crashed after that
- played sounds even in manner mode
- could not finish a game by passes

improvedments
- disabled Magnifying glass for iPad
- proper timing of stone sounds
1.1.0 2018-11-30
Finally iPhone support with a magnifying glass!
And share button to save a record!
1.0.1 2018-11-22
Thank you for reviewing about "A Master of Go"!
Here is a version improving your suggestions.

- bug-fixed that previous sequence was not erased when updating variation sequence.
- UI easier to understand
- improved SGF support
- added functionality to take back a move to touch the move played just before
1.0 2018-11-14