Random musings from Acid Ape Studios
In particular about Acid Ape Chess

June 11, 2020 Acid Ape Chess 1.6 released

Acid Ape Chess 1.6 has been released:

  • Multiple engine best moves (aka MultiPv) can now be displayed (increase the Principal variations setting).
  • Analysis can now be paused (long-press the stop analysis toolbar button).
  • A Samsung bug affecting the main menu button has been worked around.
  • Is compatible with the upcoming version of Chess Engines Collection.
  • A few minor issues have been fixed.
May 20, 2020 Acid Ape Chess 1.5 released

Acid Ape Chess 1.5 has been released:

Lichess changes

  • Challenges are now supported (in and out).
  • Friends are now supported.
  • Ultra Bullet games can now be played (¼-, ½-, and ¾- minute).
  • Acid Ape Chess no longer prompts for resuming correspondence games on login (Lichess supports playing normal games and correspondence games simultaneously).
  • Resuming games now works properly.
  • A Lichess protocol change caused Acid Ape Chess to no longer receive chat messages from the opponent: fixed.

Other changes

  • An evaluation graph has been added.
  • FICS friends are now supported.
  • The game information subpage now displays local PGN duel statistics (for human duels and engine duels).
  • To be compatible with the upcoming Android 11, PGN files are now saved in the app-specific storage area. Games from a previous installation of Acid Ape Chess will be automatically copied to this location on first startup. An import/export feature has also been added to the PGN Explorer.
  • The system file picker is now used when adding a custom engine and when importing a puzzle collection (required by the upcoming Android 11).
  • When using a DGT board, red exclamation marks would sometimes be displayed during castles: fixed.
  • The Select Option 25 on your DGT3000 message is no longer displayed for the DGT Revelation II.
  • Arasan has been updated to 22.0.
  • Performance has been improved.
  • A few minor issues have been fixed.
November 28, 2019 Online user manual

The Acid Ape Chess User Manual is now available on our website (singlepage HTML).

PDF and multipage HTML versions may be released in the future.

November 25, 2019 Acid Ape Chess 1.4.1 released

Acid Ape Chess 1.4.1 has been released:

  • Arasan has been updated to 21.4.
  • A few minor issues have been fixed.
May 7, 2019 Acid Ape Chess 1.4 released

Acid Ape Chess 1.4 has been released.

New in this release:

  • Favorites support has been added to the OTB player list.
  • The OTB player list can now be filtered by sex.
  • The OTB player search has been made smarter. For instance, simply type v anand to easily reach Viswanathan Anand.
  • The auto-annotation algorithm has been improved.
  • Specific Lichess users can now be searched (Main Menu > Players > Lichess > Search for more).
  • The Komodo-specific "Skill" UCI setting is now supported natively by Acid Ape Chess. This setting was introduced in Komodo 11.
  • The rankings page now features an OTB tab, listing the FIDE world rankings.
  • Arasan has been updated to 21.3.
April 10, 2019 Acid Ape Chess 1.3 released

Acid Ape Chess 1.3 has been released.

New in this release:

  • An eval gauge is now displayed next to the board during analysis or engine play; this gauge can be turned off in the settings page.
  • A link to our privacy policy has been added (Main Menu > Settings and help > Privacy policy).
March 29, 2019 Congratulations!
When choices are to be made...

Congratulations to Mohammad Fahad Rahman for his stellar performance at the Asian Zonal Chess Championships 2019, finishing ahead of several adult Grandmasters to claim the title! This achievement instantly made him an IM and qualified him for the FIDE Chess World Cup 2019.

Needless to say, Mohammad is using Acid Ape Chess Grandmaster Edition for his game preparation and analysis. His next goal is to become a Grandmaster, and we have decided to support him in that quest. By purchasing Acid Ape Chess Grandmaster Edition, you help young talents such as Mohammad.

March 19, 2019 Acid Ape Chess 1.2 released

Acid Ape Chess 1.2 has been released.

Highlights from this release:

  • Games can now be auto-annotated (using a chess engine and the endgame tablebases).
  • Game subpage layouts can now be saved and restored (long-press a game subpage title to access the subpages layout selection dialog).
  • Engine evaluation scores can now be displayed as absolute values (positive when white is winning, zero when sides are equal, negative when black is winning) by disabling the Display relative score in the global settings page.
  • Some annotated moves (!, !!, ?, ??) are now colored in green, light green, red or light red.
  • The DGT3000 sounds can now be toggled.
  • The move speech recognition algorithm has been slightly improved.

Auto annotation in action, using the game 10 of World Chess Championship 2018:

Auto annotation, step 1 Auto annotation, step 2 Auto annotation, step 3 Auto annotation, step 4

As can be seen in the last screenshot, Stockfish 10 believes that Fabi could have won this game, as he had a quite favorable eval when the draw was agreed.

March 12, 2019 Acid Ape Chess 1.1 released

Acid Ape Chess 1.1 has been released.

Highlights from this release:

  • Physical board support: a stabletime algorithm (similar to the one in the DGT Rabbit Plugin) has been implemented; this eliminates incorrect detection of sliding moves on sensitive boards.
  • Time control support has been greatly extended. A wide range of predefined time controls is now provided. You can also add custom time controls supporting multiple periods, move limits and Fischer increments.
  • Engine and two-player games can now be adjourned and resumed later on.
  • The flipped and clock at left physical board page settings are now saved permanently.
  • Acid Ape Studios notifications (if any) are now periodically retrieved from our server and shown as Android system notifications (you can disable this notification channel in the Android system settings).
  • Physical board support: kings can now be placed in two of the center squares to encode the game result.
  • Physical clock support: opponent moves are now displayed on the physical clock.

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