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

March 25, 2020 Status update

We are in the process of finalizing the next version of Acid Ape Chess, featuring some great new features and improvements.

We will also update Chess Engines Collection soon (yes, it will ship Stockfish 11).

Stay tuned!

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 13, 2019 Pricing changes

Our prices are going down. Read about it, and enjoy!

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.
March 6, 2019 Thanks!

We would like to thank our users for their considerable support and encouragements following the release of Acid Ape Chess 1.0.

We have received a massive amount of feedback (public and private). A lot of funny reactions, too. We have met amazing people from all over the world and this has been a very nice experience. We should write a long article about all this someday.

We have hired a chimp to answer the Google Play one stars of a vocal minority of users that have decided not to purchase Acid Ape Chess Grandmaster Edition (which is of course perfectly ok) but find it absolutely necessary to grant us a one star about it, coupled with an (often unfactual) incendiary comment. We are proud that this vocal minority only ever complains about the price of our products (tells a lot about the quality we are able to deliver).

Today we have released Acid Ape Chess 1.0.3, which fixes some Android 9.0 network issues (online opening book, opening explorer, EGTB, etc). These were caused by the fact that starting with version 9.0, Android has changed a default setting, forcing all apps to update for that new default.

With your continued support, we are now proceeding with the items in our pipeline that will keep Acid Ape Chess on the leading edge:

  • iOS support;
  • intelligent landscape mode;
  • UI optimizations for tablets;
  • a desktop version;
  • video conferencing and human coaching;
  • support for more electronic boards and clocks;
  • and more!
February 4, 2019 Acid Ape Chess reaches 1.0!

Acid Ape Chess 1.0 has been released!

New in this version:

  • An user manual has been added
  • A fullscreen clock has been added, for playing OTB without a physical clock
  • A standalone clock app has been added, for non-connected OTB games
  • The DGT Smart Board is now supported
  • The DGT3000 chess clock is now supported
  • DGT support has been improved
  • A player manager has been added, for registering human players for OTB games
  • A setting to always annunciate moves has been added
  • Several piece themes from Maurizio Monge have been added
  • Chess engines can now use our large online opening book
  • Arasan has been updated to 21.2
  • Scorpio has been updated to 2.8.9 MCTS+NN-20181229
  • Endgame tablebases have been made functional again and now provide access to 7-men Syzygy tablebases
  • Game sharing now provides a downloadable PGN link
  • Move input issues that were apparent in fast games have been fixed
  • Lichess support has been adapted to Lichess protocol changes
  • Some PGN Explorer issues have been fixed
  • Some battery usage optimizations have been applied
  • And more!

Please note: to make Acid Ape Chess even better in the future, this release is using a free/paid model. Some of the listed changes are to be found in Acid Ape Chess Grandmaster Edition.

December 4, 2018 Chess Engines Collection 1.3 released

Chess Engines Collection version 1.3 has been released.

It features two updates: Stockfish 10 (the newest version of the strongest engine in the world at the time of this writing), and its assembler variant armFish.

As part of our testing we have organized an interesting match between Stockfish 10 and armFish 20181204. This match was played on a powerful octa-core phone.

This means that each engine had 3 cores, since our core allocation algorithm ensures fairness (an equal number of cores for each engine) while keeping one core free for the Android system and other background apps.

The match consisted of 4 blitz games with 5 minutes for each side and no increment. A coin flip decided that Stockfish 10 started the first game as white.

While this means nothing per se (especially since we were taking screenshots at random moments, thus depriving the side to move from some useful CPU cycles), Stockfish 10 won this match (2½-1½), the results being as follows:

  • Game 1: Stockfish 0 - 1 armFish (White forfeits on time)
  • Game 2: armFish ½ - ½ Stockfish (drawn by repetition)
  • Game 3: Stockfish 1 - 0 armFish (Black forfeits on time)
  • Game 4: armFish 0 - 1 Stockfish (White forfeits on time)

Some screenshots of the games:

Stockfish 10 vs armFish in Acid Ape Chess Stockfish 10 vs armFish in Acid Ape Chess Stockfish 10 vs armFish in Acid Ape Chess Stockfish 10 vs armFish in Acid Ape Chess

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