Android binary

[acristescu]

Now that we have a CPU-only version of the engine, would it be possible to add arm7 and/or arm64 to the compiled binary of the release? I couldn't get it going, but then I haven't compiled any C++ since I finished uni many years ago :) It should be possible though as there are several of these floating around for both Leela Zero and SAI (for example https://github.com/Grant-Tao/compiled-leelaz-0.17-for-android-phones and https://github.com/evdwerf/leela-zero/tree/android ).

The second repo above even has the modifications to the Makefile for Android (see this comparison leela-zero/leela-zero@next...evdwerf:android ).

Is that something that could be achieved?

[simonguoxm]

this will be a great feature for the phone.

[l1t1]

ahq weiqi pro includes it.

http://www.flygo.net/bbs/forum.php?mod=viewthread&tid=112497&extra=page%3D1&mobile=2

[cryptsport]

@l1t1 I seem to have the wrong site. do you have another link? is this program paid?

[portkata]

@cryptpark
acristescu will probably have one in a few months, until then we have https://github.com/aki65/aki65.github.io/releases
version .1 and .2 are opencl for qualcomm phones, .4 and .5 are eigen cpu for any phone, tablet or chromebook. Speed is good but i wish the katrain calibrated ai equation could be applied and distributed as a paid app. Everyone is doing great work with katago, it is a dream come true

[acristescu]

@portkata could you please describe what do you mean by the "calibrated ai equation"? FYI after I posted this, somebody on reddit pointed the aki65 stuff to me and I manage to reverse engineer the binary out of it. It's still not great as the guy did not put the scripts online, just the resulting APK and he or she might not build a newer version. Not having an official build is a big miss IMHO.

I am planning to include the AI into the free app OnlineGo (https://play.google.com/store/apps/details?id=io.zenandroid.onlinego&hl=en). I have solved most technical problems I think, I just need to tweak some things so that it doesn't beat us mere mortals too badly :)

[portkata]

@acristescu Thank you for your work :)
Sanderbaduk uses an equation to weaken katago on one visit to play at various ranks 15k to low dan, but weaker than the policy. It is explained in this issue thread in his katrain software sanderland/katrain#74 and also referred to in passing here sanderland/katrain#73
Incorporating this into a katago android gui if possible would let users of any rank play an even match against katago. It gives the user the ability to set katago's rank to weaker than 3d (1 visit). Your gui is the best android go experience so far, allowing the user to play against katago at >1500 visits/move, but it is not possible to be competitive against such a strong bot. It is still such great joy to play.

[portkata]

ahq weiqi pro includes it.

http://www.flygo.net/bbs/forum.php?mod=viewthread&tid=112497&extra=page%3D1&mobile=2

link to download http://aqgo.ezandroid.cn/AQGoPro_1.3.0_2020-09-27.apk
Paypal ($15 US): 397093109@qq.com
activation code arrives in one business day.

[acristescu]

What?!?! $15 for just integrating the hard work of other people into an android app? That is highway robbery... Now I feel like a schmuck for giving the app for free :)

As for Katrain, yes, I am aware of that (see for example this reddit thread in which both me and @sanderland are discussing it). Thank you for pointing out the equation in the Katrain code, I'm going to give it a honest go at implementing it in the app, but @sanderland put a lot of work and thought into this I'm pretty sure I will not be able to do nearly as good a job as him/her. Perhaps @sanderland could be persuaded to contribute that aspect to my open-source app once I manage to get the integration going? :)

[sanderland]

@acristescu wait until you see things like this - when you pick a license you know what people can do with it, and I can't get worked up about it.
AI code is here and is quite simple overall. KaTrain being based on kivy should be able to run on android, but no luck so far from my end.

[portkata]

@sanderland would it be very difficult for you to write the code for the calibrated ai in @acristescu's apk if he does the gui and katago implementation? Thanks for the time.

[acristescu]

That would be awesome, otherwise I'll have to "git gud" at magic such as this:

elt = [(math.log(random.random()) / (item[1] + 1e-18), item) for item in items]  # magic
    return [e[1] for e in heapq.nlargest(pick_n, elt)]  # NB fine if too small

[sanderland]

well if you ignore the name of the function, which is weighted_selection_without_replacement....
I'm hesitant to get pulled into other projects as my own is already taking far more than I ever imagined. Please try it yourself first, I bet the main work is mapping things onto your own data structures, which I wouldn't know about anyway.

[portkata]

Maybe the calibrated ai was too much to ask. Does this zip file have all the files necessary to run katago in android in the command line? https://drive.google.com/file/d/12QNGdFx0e0GHfpzB6GFWcsHoq1TRJklg/view?usp=drivesdk
what files are absolutely necessary to play a game? Like do i only need the katago file, gtp.cfg, and the tensorflow file, or just the first two, etc? Thanks!

[acristescu]

@portkata all that you need is available in the APKs you've initially posted ( https://github.com/aki65/aki65.github.io/releases ). You just have to unzip the APK, then locate a file called private.mp3 then rename that as .tar.gz then unzip that, then find the katago executable. What you need are the binary (which is the one that this issue asks for as an official release) + any net + an appropriate cfg file. I have all that and I am now migrating my app from using GTP to using the katago JSON analysis engine (which IMHO is a lot nicer). I should have that done shortly, and then I can release a version without scaling. I expect that to play at 3-4d. Once that is done, I can, in a second iteration, try to reverse engineer @sanderland 's work (for which I am grateful, please don't misinterpret my "magic" comment as dismissive).

That being said, I still think the initial request of this issue is a valid one: a katago binary that I don't have to basically steal from somebody that is ripping people off with $15 price tags would be great (but beyond my skill).

[portkata]

(edited) Thanks for all the detailed replies and hard work towards this. Sorry, probably stupid, but just one last question. So if I'm understanding correctly the 3 files in the zip file attached below
64-bit_katago_android.zip
32bit_katago_android.zip
(android binary, 10b net, and gtp.cfg 14mb) are the only ones needed for katago on android command line on any phone? no dll file equivalents are needed? Thanks so much!