Rebel 16.2: Impressive!

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Steve Maughan
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Re: Rebel 16.2: Impressive!

Post by Steve Maughan »

Eduard wrote: Fri Feb 24, 2023 8:20 pmI ran Rebel 16.2 through my test suite (at 60s per move) but in all tactical positions Stockfish is better and faster.
Here are six tactical positions where Rebel is faster than Stockfish:

[d]r4rk1/5p2/p1b1pQpq/8/1B2P3/2NR4/PPP3PP/1K6 w - -

[d]1R3b2/3r3k/2p1bp1p/r1q1pNpQ/2PpP2P/6B1/P4PP1/1R4K1 w - -

[d]2kr3r/pRp3q1/2Pppn2/4p2p/B2bP1p1/7P/2P2PP1/2BQ1RK1 w - -

[d]r5r1/8/bRP1pk1p/3pNp2/5P2/7P/PR4P1/6K1 w - -

[d]r1r3k1/p3bppp/2bp3Q/q2pP1P1/1p1BP3/8/PPP1B2P/2KR2R1 w - -

[d]2qrr1n1/3b1kp1/2pBpn1p/1p2PP2/p2P4/1BP5/P3Q1PP/4RRK1 w - -

In all likelihood Stockfish is better than Rebel at tactics (but not by that much). And it's incorrect to say Rebel is "better and faster" in "all tactical positions".

— Steve
http://www.chessprogramming.net - Juggernaut & Maverick Chess Engine
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mclane
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Re: Rebel 16.2: Impressive!

Post by mclane »

Eduard wrote: Fri Feb 24, 2023 8:20 pm
chrisw wrote: Fri Feb 24, 2023 10:40 am
Eduard wrote: Fri Feb 24, 2023 9:39 am Oh guys depth 16 from Stockfish (and maybe Ponder OFF) - that's a joke. How can you get excited about games like this? You live on another planet! :mrgreen:
Well, some of us engine programmers are interested in toppling the long time champion from her number one spot and to do that we have to know where her weaknesses lie. Since it is very difficult trying to work out what a chess engine is thinking/doing from incomprehensibly deep lines, it helps to play fast games and look for her problems with shallower lines. What these games show is the very high pruning and type of pruning that SF does, namely very materialistic. What does SF miss? Clearly elements related to king safety. So now we have a line of attack. Theee fast games show the line of attack working, which gives us confidence (or excitement or whatever you want to call it) to continue. Plus it’s fun.
Oh well,
you're welcome to do it, have fun! Stockfish achieves incredible search depths on modern computers and currently outperforms all other engines. On the server with 8 cores in the middle game with Stockfish I achieve a search depth of about 40 plies and more.

I ran Rebel 16.2 through my test suite (at 60s per move) but in all tactical positions Stockfish is better and faster.

You pick out a few individual positions here and are fascinated by what happens on lame hardware and bullet (16 plies). Have fun.
Eduard. Are you a grandfather?
You said the engines are for grandfathers.
If NOT, you are not allowed to use it by your own definition you posted here.
What seems like a fairy tale today may be reality tomorrow.
Here we have a fairy tale of the day after tomorrow....
Eduard
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Re: Rebel 16.2: Impressive!

Post by Eduard »

I don't use this engine. I was just looking at them because they're talking about Impressive! I can't let that stand. Unfortunately, the engine proved to be very weak in my test.

Also keep in mind that you want to make fun of Stockfish here even though Stockfish is light years better than Rebel 16.2. Keep living your dreams that are not true!
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Re: Rebel 16.2: Impressive!

Post by chrisw »

Eduard wrote: Fri Feb 24, 2023 10:09 pm I don't use this engine. I was just looking at them because they're talking about Impressive! I can't let that stand. Unfortunately, the engine proved to be very weak in my test.

Also keep in mind that you want to make fun of Stockfish here even though Stockfish is light years better than Rebel 16.2. Keep living your dreams that are not true!
Why are you so heavily invested in Stockfish?
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Rebel
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Re: Rebel 16.2: Impressive!

Post by Rebel »

Eduard wrote: Fri Feb 24, 2023 10:09 pm I don't use this engine. I was just looking at them because they're talking about Impressive! I can't let that stand. Unfortunately, the engine proved to be very weak in my test.

Also keep in mind that you want to make fun of Stockfish here even though Stockfish is light years better than Rebel 16.2. Keep living your dreams that are not true!
Some of us appreciate the beauty of chess when they see it posted.

And who has said Rebel is better than Stockfish?

Oh wait, it's only you how implied so :wink:
90% of coding is debugging, the other 10% is writing bugs.
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Rebel
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Re: Rebel 16.2: Impressive!

Post by Rebel »

Eduard wrote: Fri Feb 24, 2023 10:09 pm I don't use this engine. I was just looking at them because they're talking about Impressive! I can't let that stand. Unfortunately, the engine proved to be very weak in my test.

Also keep in mind that you want to make fun of Stockfish here even though Stockfish is light years better than Rebel 16.2. Keep living your dreams that are not true!

Code: Select all

RANK   ENGINE                                    GAMES  POINTS   1  2  3  4  5  6  7  8  9  10
-------------------------------------------------------------------------------------------------
1.   STOCKFISH 15.1 64-BIT                       10     6.0    ** =. =. =. 11 =. =. =. =. =.
2.   REBEL 16.2 64-BIT                           10     5.5    =. ** =. == =. =. =. =. =. 1.
3.   BERSERK 11.1 64-BIT                         10     5.5    =. =. ** =. =. == =. =. 1. =.
4.   DRAGON 3.2 BY KOMODO 64-BIT                 10     5.0    =. == =. ** =. =. =. =. =. =.
5.   SLOWCHESS BLITZ 2.9 64-BIT                  10     4.5    00 =. =. =. ** 1. =. =. =. =.
6.   IGEL 3.4.0 64-BIT                           10     4.5    =. =. == =. 0. ** =. =. =. =.
7.   ETHEREAL 14.00 64-BIT                        9     4.5    =. =. =. =. =. =. ** =. =. =.
8.   REVENGE 3.0 64-BIT                           9     4.5    =. =. =. =. =. =. =. ** =. =.
9.   KOIVISTO 9.0 64-BIT                          9     4.0    =. =. 0. =. =. =. =. =. ** =.
10.   RUBICHESS 20221120 64-BIT                    9     4.0    =. 0. =. =. =. =. =. =. =. **

Total games = 48
Graham's current tournament.

Don't reply, I am only teasing you :wink:

And....... CSTAL when released will be a lot stronger, no teasing.
90% of coding is debugging, the other 10% is writing bugs.
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silentshark
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Re: Rebel 16.2: Impressive!

Post by silentshark »

Well.. assuming there a still a few other old school lurkers about, I say 'go for it, Ed and Chris' and 'bravo'.

Feels like you are injecting some fun back into computer chess.

All the best,

Tom (never met you Ed, but your engine smashed mine in London in 2000. And Chris, we met once, I think in 1997, Paris when CSTal was causing commotion - in a good way!)
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Rebel
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Re: Rebel 16.2: Impressive!

Post by Rebel »

silentshark wrote: Fri Feb 24, 2023 11:57 pm Well.. assuming there a still a few other old school lurkers about, I say 'go for it, Ed and Chris' and 'bravo'.

Feels like you are injecting some fun back into computer chess.

All the best,

Tom (never met you Ed, but your engine smashed mine in London in 2000. And Chris, we met once, I think in 1997, Paris when CSTal was causing commotion - in a good way!)
Thank you.

If you meant the WCCC in the Aleandra Palace in London 2000 then we must have met, I was there.
90% of coding is debugging, the other 10% is writing bugs.
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Re: Rebel 16.2: Impressive!

Post by BrendanJNorman »

Eduard wrote: Fri Feb 24, 2023 8:58 pm What excuse? I play on the server. Come by with your engine and your 15.000 euro computer. We play Bullet. I allow you to use all books, I run Stockfish with 8 cores without book. We play 100 bullet games. OK?

I might have tested it myself with Rebel 16.2 on the server. Unfortunately I don't understand the options for Move Overhead. The default value is 7 and can be adjusted between 0 and 25.

Is that 25ms? To be able to play on the server because of LAG I need an overhead of 300ms.

In the past more than 20 years ago there were no fast machines. However, the technology industry has made extreme progress. 20 years ago nobody could have imagined such devices as smartphones. Today everyone has a smartphone. Today everyone has a fast PC. Why shouldn't programmers use this technique to create fast engines? The neural networks are also very new. Before 2017 nobody could have imagined an engine like Lc0 or Stockfish NNUE.

Why should Stockfish be programmed differently? Stockfish uses state-of-the-art technology and is an amazing modern engine. But you wanted to bring back the past. Some here are talking about great knowledge-based engines that understand chess better than stockfish. That may be the case, but on modern computers Stockfish is worlds better, also tactically! I therefore see no point in dealing with engines that dominated the computer chess scene 25 years ago.

I think it's great what's happening with Lc0. Unfortunately, graphics cards are expensive and eat up too much power. The programmers of Komodo Dragon do it better. Great progress has been made in the last 3 years. Ethereal is also interesting. These are engines with a future.
What motivates you to adopt the role of an aggressive gatekeeper in this thread? Why not applaud what the legends of computer chess are attempting here?

Everyone knows Stockfish is strong and so there is no need for you to spend endless paragraphs massaging his back.

Also, the way you say "I play on the server" somehow has the tone that you think you yourself are somehow a "player" here and not merely a mouse-controller (who clicks "accept" when a challenge comes in) for your hacked versions of Stockfish.

Humility goes a long way when criticising the work of people 40 years into their career in the very field you speak on.

The way I read the thread was that Chris and Ed are pushing the boundaries of playing STYLE, whilst still hitting Stockfish-LIKE strength levels.

The CHESS is what matters (for chessplayers, not mouse-clickers), as in GAMES OF CHESS, not how an engine does in cherry-picked test suites.

An artist's work is praised not for a little brushstroke in the corner of the painting, but for the overall picture presented.

It is the same in chess.
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Re: Rebel 16.2: Impressive!

Post by Eduard »

I have nothing against this engine. I wouldn't have even read the topic if the word impressive hadn't been mentioned. So I was curious and installed the engine. But I couldn't find anything that I would call impressive. I already know Rebel from the MS DOS times, I also know MChess and Chess Genius. I also remember old forum posts on the German platform Gambit Soft, where "Mclane" played with CSTal vs. Junior forum games.

It was a good time, but it's history. These programs are history, and by being revisited over and over again (countless new Rebel variations) will not serve the advancement of computer chess. I have the feeling that the old programmers only do it because they are either bored with life or they need attention.