Stockfish 15.1 is ready

[Modern Times]

ended up getting one of the new Macbook Pro's 13 inch with the new M2 chip. OMG !!! I cannot explain how incredibly impressed I was with the video editing performance of my spearfishing GoPro footage. It was dramatically faster ... I mean by several orders of magnitude ... t

Of course - Apple know that that userbase is incredibly important to them and made sure their new CPU was fast at that specific type of work. All great for marketing that is what they are the best at. On top of that they worked with some of the key software vendors to make sure their software was optimised for it. That's what I read. Outside this specific use-case, the performance is competitive but not superior. What does impress me is the low power usage, so performance per watt.

[Modern Times]

We have a regression of approx. 20 ELO after 800 games
(only!) with shorter TC
https://cegt.forumieren.com/t1830-testi ... ish-15-1nn

Funnily enough my 4CPU results for SF 15.1 show a slight regression (around 10 Elo) so far as well, but only 120 games played, so the error bars are still big. Many more games to go.

Well, out of all the books used for 40/15 testing Graham, you are using the one that is the most draw-ish - Top10SuperGM2020.cgb - is that right ? If so, once more games are played I expect you will reach parity with SF 15 and a bit more, but with that book I wouldn't be optimistic.

[M ANSARI]

ended up getting one of the new Macbook Pro's 13 inch with the new M2 chip. OMG !!! I cannot explain how incredibly impressed I was with the video editing performance of my spearfishing GoPro footage. It was dramatically faster ... I mean by several orders of magnitude ... t

Of course - Apple know that that userbase is incredibly important to them and made sure their new CPU was fast at that specific type of work. All great for marketing that is what they are the best at. On top of that they worked with some of the key software vendors to make sure their software was optimised for it. That's what I read. Outside this specific use-case, the performance is competitive but not superior. What does impress me is the low power usage, so performance per watt.

Yes ... I was never an Apple guy but I do use an Iphone. But on the PC or laptop Apple stuff I wouldn't touch an Apple product with a 10 foot pole. I grew up building my own PC's and like how I can customize things to my liking and not have others decide what I need to have, I still will never travel with my Mac laptop unless I am using it to edit GoPro videos. I just don't want to go through the learning curve of learning a new OS and I have been extremely frustrated just getting to do simple tasks. However I will be the first to admit that when it comes to battery efficiency and video or photo editing ... it is just incredibly impressive. It is not a slight performance edge and slightly better battery life ... it is dramatically better by several orders of magnitude. Plus the video and photo editing performance trashes even my souped up PC !!! Hard to explain but like when you use the dial to go to a certain part of an edited video ... absolutely no stutter even with Ultra 4K video. Really has to be seen to be believed.

[Werewolf]

ended up getting one of the new Macbook Pro's 13 inch with the new M2 chip. OMG !!! I cannot explain how incredibly impressed I was with the video editing performance of my spearfishing GoPro footage. It was dramatically faster ... I mean by several orders of magnitude ... t

Of course - Apple know that that userbase is incredibly important to them and made sure their new CPU was fast at that specific type of work. All great for marketing that is what they are the best at. On top of that they worked with some of the key software vendors to make sure their software was optimised for it. That's what I read. Outside this specific use-case, the performance is competitive but not superior. What does impress me is the low power usage, so performance per watt.

Yes ... I was never an Apple guy but I do use an Iphone. But on the PC or laptop Apple stuff I wouldn't touch an Apple product with a 10 foot pole. I grew up building my own PC's and like how I can customize things to my liking and not have others decide what I need to have, I still will never travel with my Mac laptop unless I am using it to edit GoPro videos. I just don't want to go through the learning curve of learning a new OS and I have been extremely frustrated just getting to do simple tasks. However I will be the first to admit that when it comes to battery efficiency and video or photo editing ... it is just incredibly impressive. It is not a slight performance edge and slightly better battery life ... it is dramatically better by several orders of magnitude. Plus the video and photo editing performance trashes even my souped up PC !!! Hard to explain but like when you use the dial to go to a certain part of an edited video ... absolutely no stutter even with Ultra 4K video. Really has to be seen to be believed.

Provided you use the Apple codecs, yes. Otherwise it's no faster except in performance/Watt

[Wolfgang]

Our 40/4 test is finished after 3400 games
https://cegt.forumieren.com/t1830-testi ... ish-15-1nn

-3 is equal strength, no improvement, no regression.
Exact difference will pop up as soon as our list is updated

[Modern Times]

These days I think the choice of opening book can make a huge difference, particularly when the Elo gains are not enormous. That alone can swing the results by up to 20 Elo. And I'm not talking about deliberately unbalanced books either.

[Eduard]

Our 40/4 test is finished after 3400 games
https://cegt.forumieren.com/t1830-testi ... ish-15-1nn

-3 is equal strength, no improvement, no regression.
Exact difference will pop up as soon as our list is updated

Stockfish 15.1 weaker (equal) than 15.0.

[Modern Times]

Stockfish 15.1 weaker (equal) than 15.0.

With error margins of approx +/- 10 Elo you just don't know. And that also depends on consistency of testing conditions with the two engines - was it on the same book, that can make a difference. Hardware too possibly when things are that close. You need upwards of 10k games with totally consistent testing conditions to really know the answer.

[Hai]

Our 40/4 test is finished after 3400 games
https://cegt.forumieren.com/t1830-testi ... ish-15-1nn

-3 is equal strength, no improvement, no regression.
Exact difference will pop up as soon as our list is updated

If the people want a better development which leads to a stronger Stockfish, they only need to do one thing:
Donate more hardware ->
https://stockfishchess.org/get-involved/
https://tests.stockfishchess.org/tests

Or be ready for Stockfish 15.2 after one year of development and -6.

[Dariusz]

ended up getting one of the new Macbook Pro's 13 inch with the new M2 chip. OMG !!! I cannot explain how incredibly impressed I was with the video editing performance of my spearfishing GoPro footage. It was dramatically faster ... I mean by several orders of magnitude ... t

Of course - Apple know that that userbase is incredibly important to them and made sure their new CPU was fast at that specific type of work. All great for marketing that is what they are the best at. On top of that they worked with some of the key software vendors to make sure their software was optimised for it. That's what I read. Outside this specific use-case, the performance is competitive but not superior. What does impress me is the low power usage, so performance per watt.

Yes ... I was never an Apple guy but I do use an Iphone. But on the PC or laptop Apple stuff I wouldn't touch an Apple product with a 10 foot pole. I grew up building my own PC's and like how I can customize things to my liking and not have others decide what I need to have, I still will never travel with my Mac laptop unless I am using it to edit GoPro videos. I just don't want to go through the learning curve of learning a new OS and I have been extremely frustrated just getting to do simple tasks. However I will be the first to admit that when it comes to battery efficiency and video or photo editing ... it is just incredibly impressive. It is not a slight performance edge and slightly better battery life ... it is dramatically better by several orders of magnitude. Plus the video and photo editing performance trashes even my souped up PC !!! Hard to explain but like when you use the dial to go to a certain part of an edited video ... absolutely no stutter even with Ultra 4K video. Really has to be seen to be believed.

macOS is intuitive and easy to learn even for an old Windows gingerbread like me.
I'm writing this as a person with a couple of half a century of life behind me of which I've had several decades to deal with Windows, PCs, building them, assembling them, configuring them, etc.
In Poland, in Eastern Europe where I live, 30, 20 and even as recently as a dozen years ago, computer = Windows. Nothing else. Drama

For me, the revolution came when I became interested in Linux. I compiled a Gentoo distribution for myself and for my computer something around 2005 and suddenly it turned out that "my Linux, my Gentoo" works better, is faster and I will do more with it than with Windows on the same computer (second partition).

After decades of dealing with Windows and various Linux distributions, for about 10 years my daily driver has been Apple devices: iPhone, iMac, MacBook Pro, etc.
For today for me - there is nothing simpler and better!
Besides, the older I get, the less time and inclination I have to play with assembling and configuring a Windows PC. My passions are chess engines and software. I prefer to devote my precious time to family, work and hobbies.

Even Windows 11, today - works better for me on a virtual machine running on a MacBook Pro with an M1 processor than on one of my computers that is only 2 years old and has fairly modern components; Windows 11 on a virtual machine is faster and more stable than Windows 11 running on this 2-year-old PC.
I use macOS, Windows and Linux simultaneously on an IMac or MB Pro with an M1 processor for my chessengeria.com site. I used to be able to only dream of such convenience and speed on any computer. No computer with Windows or any Linux distribution will offer me such capabilities and freedom. Of course, everyone has different needs, preferences, hobbies. Mine are as I wrote.
I could write and write like this... Sorry for the lengthy comment