Aggression Test

[Werewolf]

I'm developing a way of testing for engine aggression, defined as seeking king attacks. It is independent of other methods which test for this quality and it is (mostly) independent of Elo.

Please could I ask the community which engine you feel should be at the top of your list of king-killers? Suggestions will be taken seriously and tested. In a month I'll post results.

[Dann Corbit]

The last version of Leptir is very good at tactical problems. Best by test so far.
Crystal 5 KWK is my favorite Crystal.
Slowchess is great at finding checkmates.
The Huntsman is not to be overlooked.
The latest CS-Tal is fun to watch.
The bleeding edge Stockfish and Lc0 are both much stronger than predecessors. Huge leaps and bounds over previous versions.

[Dann Corbit]

For unsolved edge cases these are useful:
Houdini with full 6 men Nalimov files (don't bother without those files)
ChestUCI
Sting 28
Sugar
Swordfish

[abgursu]

As I watch more and more, the progression of chess engines' strenght got all of their styles similar, so I won't pick anything new because I've seen much more aggressive guys. But from my tests, which I stopped like 3-4 months ago (so might be a little outdated but sf progress is also slow, so...), my top 5 picks from highest aggression to lowest are:

1-)My clone of BrainLearn 23.1, just nuts. Hard to battle against normal Stockfishes, but a great sparring partner for humans. It's rating is in between Latest SF Classical and Komodo 14. I could send it via pm if asked.
2-)Good old Fizbo 2; it doesn't play good, comparable chess against today's engines(once it used to be great) but again, a great sparring partner for us. Definetely one of my fav picks when it comes to aggression.
3-)Kayra 1.5 clone (which is a sf clone by Mehmet Karaman) of Eduard, Kayra 1.5 Attack. It could hustle up with it's time fishes; but it got weaker as fishes got updated, still offers a good fight tho.
4-)Blue Marlin 15.7; Pretty great, pretty great. dorsz's Stockfish clone. A good novelty inventor and a great fighter; despite being outdated, still it scores pretty well against current fishes.
5-)CSTal 2.00 EAS Version: This is also one of the engines that can battle some of the today's tough guys(can't fight sf's tho). One of the engines which kept it's aggressivity and still play in high levels.

These are my top 5, but I could also do a honorable mentions section, which would be Sawfish and Swordfish(both stockfish clones from dorsz), Dragon MCTS and RubiChess. I didn't checked new guys like I said, but what I observed from CCC, new guys Obsidian and Stormphrax look also pretty stylish. I didn't use some sort of a puzzle test to make my observations, because they usually just test tactical abilities only, but I watched and also played against all of my picks repeatedly and talking from the way they move, so a more subjective list than most people but still, you could check all of them out for yourself.

Best regards...

[Whiskers]

When Patricia 2.0 releases (should be within a week or two) it should be the most aggressive engine ever, however it's much weaker than the other engines listed here (at only 3000-3200 depending on how many search patches I can get to work without the aggression level tanking).

[pohl4711]

I'm developing a way of testing for engine aggression, defined as seeking king attacks. It is independent of other methods which test for this quality and it is (mostly) independent of Elo.

Already done by me - my EAS-Tool...
https://www.sp-cc.de/eas-ratinglist.htm

In the full list, the EAS-list is below the ratinglist, just scroll down:
https://www.sp-cc.de/files/uho_full_list.txt

Here the results of my old SPCC-Ratinglist, including weaker engines (the EAS-list is below the ratinglist, just scroll down):
https://www.sp-cc.de/files/spcc_full_list.txt

PS:
If anybody still doubt, that the EAS-tool is not independent of Elo or scoring, just look here:
https://www.sp-cc.de/experiments.htm

[Werewolf]

I'm developing a way of testing for engine aggression, defined as seeking king attacks. It is independent of other methods which test for this quality and it is (mostly) independent of Elo.

Already done by me - my EAS-Tool...

Yes, but I'm so glad there is variety in life...

[Werewolf]

The last version of Leptir is very good at tactical problems. Best by test so far.
Crystal 5 KWK is my favorite Crystal.
Slowchess is great at finding checkmates.
The Huntsman is not to be overlooked.
The latest CS-Tal is fun to watch.
The bleeding edge Stockfish and Lc0 are both much stronger than predecessors. Huge leaps and bounds over previous versions.

Thanks, all added to the list.
Is the latest CS Tal still v2?
Do you have a link to the latest Huntsman by any chance?

[Joerg Oster]

The last version of Leptir is very good at tactical problems. Best by test so far.
Crystal 5 KWK is my favorite Crystal.
Slowchess is great at finding checkmates.
The Huntsman is not to be overlooked.
The latest CS-Tal is fun to watch.
The bleeding edge Stockfish and Lc0 are both much stronger than predecessors. Huge leaps and bounds over previous versions.

Thanks, all added to the list.
Is the latest CS Tal still v2?
Do you have a link to the latest Huntsman by any chance?

Still version 1.
https://github.com/joergoster/Stockfish ... ses/tag/h1

[Werewolf]

I'm developing a way of testing for engine aggression, defined as seeking king attacks. It is independent of other methods which test for this quality and it is (mostly) independent of Elo.

Already done by me - my EAS-Tool...
https://www.sp-cc.de/eas-ratinglist.htm

In the full list, the EAS-list is below the ratinglist, just scroll down:
https://www.sp-cc.de/files/uho_full_list.txt

Here the results of my old SPCC-Ratinglist, including weaker engines (the EAS-list is below the ratinglist, just scroll down):
https://www.sp-cc.de/files/spcc_full_list.txt

PS:
If anybody still doubt, that the EAS-tool is not independent of Elo or scoring, just look here:
https://www.sp-cc.de/experiments.htm

So just so I'm clear here, out of all the engines you've tested, Velvet 4.1.0 is the most aggressive of them all?