Fat Titz 1.1 released!

[gaard]

The previous thread has been closed for an unknown reason (perhaps for off-topic unrelated to the engine?). As far as I know this was the first engine to have its thread closed, and I feel discriminated.

Fat Titz 1.1

Changes:

• मुझे पढ़ें का हिंदी अनुवाद जोड़ें
• 添加中文自述文件
• Fix "Use NNUE" UCI option, now works correctly
• Fix not printing "holy hell" when ep is the bestmove in the Anarchy mode.
• Update to "do more LMR extensions for PV nodes"
• Update to "CMH Pruning Tweak"

Note: The new nodes speedup formula with 3 fundamental constants by Additional Pylon aka ChickenLogic was unfortunately lost due to a github force-push malpractice. Stockfish should be thankful for this loss as otherwise the engine would just be unbeatable.

New binaries available here: https://drive.google.com/drive/folders/ ... sp=sharing. The _bin zip doesn't contain the net, as it has not changed.

Fat Titz 1.0

This is a FREE UCI-compatibile chess engine. It is a fork of cfish.

Thanks to Norman Schidt and Albert Sliver for inspiration on creating my own fork of Stockfish. Also big thanks to Robert Houdart for great optimization ideas, overall making the engine almost 20% faster!

This engine uses a HalfKAv2-2048x2-64-64-1 evaluation network, which contains whopping 4 times the knowledge of Stockfish 14. It was trained partially on Lc0 data, which gives it a unique positional style, while still preserving the tactical sharpness of Stockfish. The network was trained using a modification of the state-of-the-art NNUE trainer, utilizing publicly available datasets 1, 2, 3

Due to the large size the release is available only on google drive here. It includes Windows and Linux binaries for all supported architectures, along with the network. This is the only place where the network can be found.

Additional features

• Polyglot support
• Anarchy mode

  • Code: Select all

    setoption name Anarchy value true

  • makes en-passant forced
• 64-bit hash key
  • reduces the amount of hash collisions and allows for more robust long analysis
  • resizing the transposition table preserves the contents as much as possible
• Persistent transposition table

• Code: Select all

  setoption name PersistentTTMinDepth value 4

  (min 0, max 255). The minimum entry depth to store/load.

• Code: Select all

  setoption name PersistentTTFileName value filename.ptt

  . The file which contains the persisted TT. Doesn't do anything on itself.

• Code: Select all

  setoption name PersistentTTSerialize

  . Serializes the current transposition table according to the options above. The file is overwritten.

• Code: Select all

  setoption name PersistentTTDeserialize

  . Deserializes the current transposition table according to the options above. Only worse entries are replaced.

How large of nets have you tested? What were the returns?

[lucasart]

Thank you Sopel. Nice! In the other thread I only wrote serious postings and only topics related to chess. The thread was closed for no reason. Can't the moderator at least write why he is closing the thread? I feel discriminated against, I don't know what I did wrong.

Indeed. It’s not like this is Gamergate. A little light misogyny never hurt anyone, right?

There is nothing misogynistic about this.

In fact, I find Fat Fritz more offensive. What about all the Germans called Fritz (a very common name), who are obese, overweight, or just uncomfortable about their weight ?

Where is the class action lawsuit on behalf of the Fritz fatties ?

[Michel]

The people here that think Fat Titz is an appropriate name should consult with their wives or daughters.

But I guess they probably don’t have them.

[AndrewGrant]

The people here that think Fat Titz is an appropriate name should consult with their wives or daughters.

But I guess they probably don’t have them.

Have them? What do you mean by HAVE them? Men don't own women. Keep your bigoted views to the relevant forums please. I am here to see the latest innovations by Sopel. I follow his work very closely, and am a huge fan of Fat Titz.

Sopel, have you reached out to CCRL to see if they would like to rate your engine? I would be excited to see it at the top of the list! Likewise perhaps CCC and TCEC could be notified. It would not be unprecedented afterall.

[smatovic]

The people here that think Fat Titz is an appropriate name should consult with their wives or daughters.

But I guess they probably don’t have them.

You can not fix this Michel. Pubertal twenty-somes who suffer from Corona-Lockdown stress are taking over TC with their gamer-culture. Bullying, in-group-thinking, flame-wars, blabla...there is a reason people like Dann, Chris or Mar do not come in here anymore.

--
Srdja

[Thomas Lagershausen]

E N,Fat Titz 310821 64 - Victorious,Stockfish 310821 0-1 0.0, Rated game, 5 min 2021
Position from my game today:
[d]3k1r1r/3bqp1n/1p1p1np1/pPpPp2p/K1P1P3/PNN1P2P/4BQPR/5R2 b - - 0 1

After move 33. What great knowledge does the engine have when it plays that?

What is the best move?

The maschine says that black is better. with ...Ng8 and f5.

But the position is very, very complicated. If white survive the next 10 moves it has a chance to play the sac Nxa5 and create some passpawns.

Is ...Ng8 best?

[Michel]

The people here that think Fat Titz is an appropriate name should consult with their wives or daughters.

But I guess they probably don’t have them.

Have them? What do you mean by HAVE them? Men don't own women.

I guess I hit a nerve since you felt the need to reply with a straw man.

For the non native English speakers: "to have" in this context is just a common idiom (e.g. "to have a brother"). It does not mean possession.

[AdminX]

So let me get this straight, any word that is picked up by it's slang definition should now be banned because some might find it offensive. This is how people give up their freedom inch by inch. Once you give it up, you will never get it back without a fight.

[Michel]

So let me get this straight, any word that is picked up by it's slang definition should now be banned because some might find it offensive. This is how people give up their freedom inch by inch. Once you give it up, you will never get it back without a fight.

I am really surprised by this opinion.

I leave it to your imagination to make up an offensive engine name which contains "niger". After all, you can always claim that you just meant the latin word for "black".

[Sopel]

How large of nets have you tested? What were the returns?

HalfKAv2-4096x2-32-32-1 (~2x larger), HalfKAv2_e9_hm-1024x2-64-64-1 (~2.5x larger), but at this point they don't learn enough to counter the speed loss.