Android UCI engine update: armFish 2018.02.11 to 2018.02.19

ArmFish is a project based on the assembly code to achieve the highest speed with Stockfish engine. A lot of updates have rained during February, so frequently that i thought it would be easier to share them all together, in a single post.

ArmFish and MateFish are provided side by side, bearing in mind that MateFish is a specific version of ArmFish, dedicated to find mating attacks quicker rather than breaking ELO records.

GET armFish 2018.02.11.LA for arm8
GET armFish 2018.02.11.CP for arm8
GET mateFish 2018.02.11.LA for arm8
GET mateFish 2018.02.11.CP for arm8

GET armFish 2018.02.13 for arm8
GET mateFish 2018.02.13 for arm8

GET armFish 2018.02.14 for arm8
GET mateFish 2018.02.14 for arm8
GET armFish 2018.02.15 for arm8
GET mateFish 2018.02.15 for arm8

GET armFish 2018.02.19 for arm8
GET mateFish 2018.02.19 for arm8

In case of trouble dowloading from PC, use your mobile or refer to THIS POST.

Android UCI engine update: CT800 1.20

CT800 is an average level engine released by Ratmus Althoff who recently concentrated on compiling for Android and finally managed to obtain working binaries.

CT800, in fact, was born as a dedicated chess computer idea and it was designed by Rasmus Althoff.  The original CT800 featured an ARM Cortex M4 microcontroller of an Olimex H405 board that operates up to 168 Mhz, with 1 MB of flash memory, 192+4 kB of SRAM, and multiple I/O and USB connectors, with a 4x20 character text display, two leds, and a 4x4 + 1 keypad as peripherals aka user interface. Voltage source is due to four NiMH rechargeable AA batteries or external 5 V DC power supply.

The "chess computer" CT800

CT800's firmware is developed by Rasmus Althoff, released under the GPL Version 3. The chess playing software is an ARM port of George Georgopoulos' open source engine NG-play including a KPK bitbase by Marcel van Kervinck.

GET CT800 1.20 for arm7 and arm8

Previous stable version was:
GET CT800 1.12 for arm7

Development versions from 1.12 to 1.20 were:
GET CT800 1.20p11 for arm7 and arm8
GET CT800 1.20p13 for arm7 and arm8
GET CT800 1.20p14 for arm7 and arm8
GET CT800 1.20p15 for arm7 and arm8

In case of trouble downloading from PC, use your mobile or refer to THIS POST.

Android UCI engine update: Cheese 1.9.2

Another bugfix update by the author, Patrice Duhamel. No ELO change expected.

WHAT'S NEW (17-Feb-2018):
Version 1.9.2
- fix engine not responding in pondering mode since version 1.9
- fix illegal moves in pondering when the search ends before receiving message from the interface
- fix an error with Arena/UCI when pondering is enable, always return a move to ponder (if possible)
- fix a problem when starting next tournament game in Fritz GUI

GET Cheese 1.9.2 for arm7 and arm8

You can also visit CHEESE HOMEPAGE for more info.

Android UCI engine update: Cichess 2.0.2018021.ACH

For the followers of the Stockfish derivatives.

GET Cichess 2.0.20180216.ACH for arm7 and arm8

In case of trouble dowloading from PC, use your mobile or refer to THIS POST.

Android UCI engine update: Cfish 2018.02.15

I fear that the day when SF and Cfish will get hourly updates that we will try to share in time. We would probably be dying of hunger because no time would be left to eat.

GET Cfish 9.0.2018.02.15.ACH for arm7 and arm8

In case of trouble downloading from PC, use your mobile or refer to THIS POST.

Android UCI engine update: Stockfish Matefinder 9.0.ACH

Matefinder is a Stockfish fork maintained by Joseph Ellis and dedicated to solve puzzles rather than hitting the highest possible ELO. Like many other derivatives, Matefinder is now updated to a new version based on Stockfish 9 code too. Enjoy!

Joseph Ellis

GET Stockfish Matefinder 9.0 for arm7 and arm8

In case of trouble downloading from your PC, use your mobile device or refer to THIS POST.

Android UCI engine update: Cfish 2018.02.13

Cfish keeps going... thanks to Alexei for regularly compiling it for Android.

GET Cfish 9.0.2018.02.13.ACH for arm7 and arm8

In case of trouble downloading from PC, use your mobile or refer to THIS POST.

Android UCI engine update: McBrain 9.0.ACH

McBrain is a tweaked Stockfish, maintained by Micheal Byrne. You can read more about it HERE. As the name suggests, this version is based on Stockfish 9.0.

GET McBrain 9.0.ACH for arm7 and arm8

In case of trouble downloading from PC, use your mobile or refer to THIS POST.

Chess Engines Collection 1.2 by APE Studios

Another engine collection by APE Studios brings yummy updates. The builds are OEX compatible, so they will be automatically recognized by all compatible GUIs, like CfA and Droidfish.

WHAT'S NEW (10-Feb-2018):
- Senpai updated to version 2.0.
- Stockfish updated to version 9.
- New engine: asmFish (an assembler port of Stockfish, available for ARM64 and x86-64).
- New engine: Rodent III.

The app is available for download at GOOGLE PLAY.

Android UCI engine update: Cfish 2018.02.10

2nd Cfish ported to Android by Alexei after SF9 official. For archivers, because others already followed.

GET Cfish 9.0.2018.02.10.ACH for arm7 and arm8

In case of trouble downloading from PC, use your mobile or refer to THIS POST.

Android XB engine update: Scorpio 2.7.9.20180206.APE

Here they are: New Scorpios bundled with Acid APE Chess Beta 16.8. I didn't test these but i guess they are compatible with CfA and other GUIs.

GET Scorpio 2.7.9.20180206.APE for arm7, arm8, x86_32 and x86_64

In case of trouble downloading from PC, use your mobile or refer to THIS POST.

Android UCI engine update: Arasan 20.4.1.APE

These are the builds taken from Beta 16.8 of Acid APE Chess GUI.

GET Arasan 20.4.1APE for arm7, arm8, x86 32 and 64 bits

In case of trouble downloading from PC, use your mobile or refer to THIS POST.

Android UCI engine update: Cfish 2018.02.06

After Stockfish, that's the turn for Cfish. This should be the first development version ported to Android following the 9.0 official. Thanks to Alexei.

GET Cfish 9.0.2018.02.06.ACH for arm7 and arm8

In case of trouble downloading from PC, use your mobile or refer to THIS POST.

Android UCI engine update: Stockfish dev't 2018.02.06.ACH

This should be the first development version ported to Android following the 9.0 official. Thanks to Alexei.

GET Stockfish 9.0.2018.02.06.ACH for arm7 and arm8

In case of trouble downloading from PC, use your mobile or refer to THIS POST.

Android UCI engine update: Zevra 20180131.ACH

Zevra is a weak engine written by Oleg Smirnov, around 1700 in Rapidroid scale. The Android build still causes issues on my devices, like the previous 1.4 version: A remarkable % of the games played with black by Zevra needs to be replayed after a division. I keep hoping Alexei can find the trick behind this problem with Chess for Android.

However, you can always try Zevra with Droidfish or for human vs machine games in CfA.

GET Zevra 2018.01.31.ACH for arm7 and arm8

In case of trouble downloading from PC, use your mobile or refer to THIS POST.

Android UCI engine update: Cfish 9.ACH

The story of compiler optimization issues observed with SF9 were applying to Cfish 9 too. That's why multiple builds came in a queue. You just pick the one that suits you well. Or, i guess you will all be more interested in the development builds which followed Cfish 9 during February. So, you may keep this Cfish 9 as a reference only in your archive.

GET Cfish 9.ACH for arm7 and arm8 (Based on official SF9 code)
GET Cfish 9.ACH no PGO for arm7
GET Cfish 9.ACH PGO fix for arm7
GET Cfish 9.ACH fixed for arm7 (build of Feb-7th)

In case of trouble downloading from PC, use your mobile or refer to THIS POST.

Android UCI engine update: Brainfish 2018.02.01.ACH

The engine:
GET Brainfish 2018.02.01.ACH for arm7 and arm8

Cerebellum book at Zipproth.de:

GET Cerebellum Light 2017.02.01

How to setup Cerebellum book:

"To use the book Cerebellum_Light_Poly.bin (download the latest version of this book from the official site in polyglot format), create a book folder in the phone's memory and put a book in it. The path should look like this: /sdcard/book/Cerebellum_Light_Poly.bin, when the engine starts the book connects automatically."

In case of trouble downloading from PC, use your mobile or refer to THIS POST.

Android UCI engine update: Stockfish 9

The long awaited ninth fish was finally released after TCEC-9, thanks to latest fruitful patches adding the utilization of the contempt factor. This number defines how positive (or negative) the engine will interpret its evaluation. More contempt means more optimism and less contempt means more desperation for an engine. By definition, contempt factor can convert draws to wins against a weaker engines but it can also cause losses instead of draws, while forcing for a win.

By the end of Janary, the official SF9 has been released on Stockfish website. It has included Alexei Chernakoff's Android builds that i share below. The choice of the Stockfish team made us extremely happy and proud of what he achieved.

GET Stockfish 9.ACH (OFFICIAL) for arm7 (Jan-31th, CRC32: 23404375) and arm8

After first tests, arm7 build has been found to perform worse than expected due to incompatibility between latest patches and heavy PGO+LTO optimizations used by the compiler. Arm8 builds were healthy but arm7 delivered less than +60 ELO vs SF8.

Therefore, following alternatives came quickly in a few days during first week of February.

GET Stockfish 9.ACH for arm7 (2nd build on Feb-2nd, probably without PGO/LTO, CRC32 = D38AD094)
GET Stockfish 9.ACH for arm7 (3rd build on Feb-2nd, fixed PGO, CRC32 = 251627CA)
GET Stockfish 9.ACH for arm7 (4th build on Feb-7th, noPGO?, CRC32 = 25D1EE16)
GET Stockfish 9.ACH for arm7 (5th build on Feb-7th, fixed PGO, no LTO, CRC32 = 65FEB516)

I'd already chosen the 3rd build for Rapidroid before the 4th and 5th came out and didn't change it afterwards because it had played a lot and its performance was satisfying (+60 to 90 ELO depending on the progression of the rounds). So, it's up to you to decide which one suits you best.

One thing is sure: More nps didn't mean higher ELO this time.

In case of trouble downloading from PC, use your mobile or refer to THIS POST.

Android UCI engine update: armFish 2018.01.28

ArmFish is a project based on the assembly code to achieve the highest speed with Stockfish engine. The Android port below was done by Alexei1976. Thanks for the contribution.

GET armFish 2018.01.28 for arm8
GET mateFish 2018.01.28 for arm8

mateFish is a specific version of armFish with some specific code aiming to find mating lines quicker rather than playing the strongest level of chess.

In case of trouble dowloading from PC, use your mobile or refer to THIS POST.

Android UCI engine update: Stockfish dev't 2018.01.23.ACH

This is the last development version of Stockfish made available by Alexei before v9 has been released.

GET Stockfish 8.0.2018.01.23.ACH for arm7 and arm8

In case of trouble downloading from PC, use your mobile or refer to THIS POST.