Stockfish TI is coming

[pohl4711]

Stockfish with Threat Input Net is finally here, no longer a regression in STC (caused by the severe speedloss, when using TI).
As expected, the Celo-gain gets bigger with longer thinking-time.

STC:
https://tests.stockfishchess.org/tests/ ... d2c195c569

LTC:
https://tests.stockfishchess.org/tests/ ... d2c195c66e

VVLTC (still running, but right now at +6.8 Celo (!)):
https://tests.stockfishchess.org/tests/ ... d2c195c7cd

[towforce]

What is a "threat input net"?

[Damir]

I suppose TI is meant, with the use of graphic cards, same as with Lc0.

[chrisw]

Stockfish with Threat Input Net is finally here, no longer a regression in STC (caused by the severe speedloss, when using TI).
As expected, the Celo-gain gets bigger with longer thinking-time.

STC:
https://tests.stockfishchess.org/tests/ ... d2c195c569

LTC:
https://tests.stockfishchess.org/tests/ ... d2c195c66e

VVLTC (still running, but right now at +6.8 Celo (!)):
https://tests.stockfishchess.org/tests/ ... d2c195c7cd

Fascinating that the addition of smarts even at what must be great cost in speed gives gains, even in CPU environment

[towforce]

I suppose TI is meant, with the use of graphic cards, same as with Lc0.

Thank you.

[Hai]

From Stockfish developers:

On arm machines specifically we’ve hit the sf 18 target already
The difference is that insane
you mean the Elo target is met due to speed increase?
Threat inputs is like +15 elo on arm machines yes
Compared to neutral so far on x86

[Modern Times]

Perfect for those Qualcomm Snapdragon X Elite based laptops on the market now, and the next generation of them due early next year.

[pohl4711]

What is a "threat input net"?

TI means, the net does not get only the board position as input, but also, which pieces are hanging or threating other pieces and so on.
This means, of course, a higher computing effort. That leads to a 20%-25% speedloss compared to a non-TI net with the same size.

[Hai]

Perfect for those Qualcomm Snapdragon X Elite based laptops on the market now, and the next generation of them due early next year.

Exactly
+ we will see more and more ARM laptops.
+ nearly every mobile phone uses ARM, so it's like a big + for everybody
+ compared to amd and intel, with arm we are still at the beginning so we will see a lot of elo+ and speedups on arm devices.
- but engine developers (not only Stockfish developers) must find these improvements.

[Sylwy]

What is a "threat input net"?

Efficiently updatable threat inputs.
This means the neural network used for evaluating positions explicitly knows about all piece interactions (threats, defenses) on the board.