Aggressive engines?

[midgard]

May be in this tread : forum3/viewtopic.php?t=60709

Thanks, Vinvin. It's a great thread! I was looking for something like this before writing but I didn't see it. A good bunch of recommendations for testing (I don't know if I'll find all those engines).

Another highly entertaining engine is Homer 2.01 in gambit mode. It also has 4 or 5 GM personalities. ELO is about 2600.

I'll try it too, thanks.

Auto skill is a good option to have. Lucas chess GUI has a good implementation, The GUI will play a move that can be at the level at, or slightly better than the player etc. Sometimes, with Lucas chess ill play an engine at about my level, then Ill usually get a long game, and I will get to play an endgame. I think the GUI uses multi PV mode. Its a little artificial, But I will have a general idea how well I have played and off course I can always analyse the game afterwards, Its also another option to weaken an Engine, particularly those engines that cant be easily weakened. So a good option and in general Lucas chess is woth checking out.

To train, I usually use a fixed skill level. Or at most, an opponent that adapts to my current strength (something like what Deep Shredder does) but remains stable throughout the entire game. I don't rule out Auto Skill, but I can't get it to work well (or I don't configure it correctly). I have tried in Luchas Chess with Dragon 1 (Auto Skill activated in the engine settings and "Something lower" in the Luchas Chess settings) and it does strange things. An example (33... Kg8):

[pgn][Event "Jugar contra un motor"]
[Site "El ajedrez de Lucas R 2.18c"]
[Date "2025.03.11"]
[Round "?"]
[White "Nacho Ros"]
[Black "Dragon1free"]
[Result "1-0"]
[ECO "B20"]
[EventDate "2025.??.??"]


1.e4 c5 2.c4 Nc6 3.Nf3 Nd4 4.Nxd4 cxd4 5.d3 e6 6.f4 Ne7 7.Nd2 d5 8.cxd5 f5
9.dxe6 Bxe6 10.e5 Qd7 11.Nf3 Nd5 12.Be2 Bb4+ 13.Bd2 a5 14.O-O O-O 15.a3 Bxd2
16.Qxd2 Ne3 17.Rfc1 h6 18.Ne1 Qd8 19.Nc2 Qb6 20.Nxe3 Rac8 21.Nc4 Bxc4 22.Rxc4
Rxc4 23.dxc4 d3+ 24.Kh1 dxe2 25.Qxe2 Qd4 26.g3 Rc8 27.Rc1 b5 28.b3 a4 29.bxa4
bxc4 30.e6 c3 31.e7 Kf7 32.Re1 Qe4+ 33.Qxe4 Kg8 34.Qe6+ Kh7 35.Qxf5+ g6
36.Qxc8 h5 37.e8=Q Kg7 38.Qf8+ Kh7 39.Qh8# 1-0[/pgn]

Greetings to everyone.

[Rowen]

May be in this tread : forum3/viewtopic.php?t=60709

Thanks, Vinvin. It's a great thread! I was looking for something like this before writing but I didn't see it. A good bunch of recommendations for testing (I don't know if I'll find all those engines).

Another highly entertaining engine is Homer 2.01 in gambit mode. It also has 4 or 5 GM personalities. ELO is about 2600.

I'll try it too, thanks.

Auto skill is a good option to have. Lucas chess GUI has a good implementation, The GUI will play a move that can be at the level at, or slightly better than the player etc. Sometimes, with Lucas chess ill play an engine at about my level, then Ill usually get a long game, and I will get to play an endgame. I think the GUI uses multi PV mode. Its a little artificial, But I will have a general idea how well I have played and off course I can always analyse the game afterwards, Its also another option to weaken an Engine, particularly those engines that cant be easily weakened. So a good option and in general Lucas chess is woth checking out.

To train, I usually use a fixed skill level. Or at most, an opponent that adapts to my current strength (something like what Deep Shredder does) but remains stable throughout the entire game. I don't rule out Auto Skill, but I can't get it to work well (or I don't configure it correctly). I have tried in Luchas Chess with Dragon 1 (Auto Skill activated in the engine settings and "Something lower" in the Luchas Chess settings) and it does strange things. An example (33... Kg8):

[pgn][Event "Jugar contra un motor"]
[Site "El ajedrez de Lucas R 2.18c"]
[Date "2025.03.11"]
[Round "?"]
[White "Nacho Ros"]
[Black "Dragon1free"]
[Result "1-0"]
[ECO "B20"]
[EventDate "2025.??.??"]


1.e4 c5 2.c4 Nc6 3.Nf3 Nd4 4.Nxd4 cxd4 5.d3 e6 6.f4 Ne7 7.Nd2 d5 8.cxd5 f5
9.dxe6 Bxe6 10.e5 Qd7 11.Nf3 Nd5 12.Be2 Bb4+ 13.Bd2 a5 14.O-O O-O 15.a3 Bxd2
16.Qxd2 Ne3 17.Rfc1 h6 18.Ne1 Qd8 19.Nc2 Qb6 20.Nxe3 Rac8 21.Nc4 Bxc4 22.Rxc4
Rxc4 23.dxc4 d3+ 24.Kh1 dxe2 25.Qxe2 Qd4 26.g3 Rc8 27.Rc1 b5 28.b3 a4 29.bxa4
bxc4 30.e6 c3 31.e7 Kf7 32.Re1 Qe4+ 33.Qxe4 Kg8 34.Qe6+ Kh7 35.Qxf5+ g6
36.Qxc8 h5 37.e8=Q Kg7 38.Qf8+ Kh7 39.Qh8# 1-0[/pgn]

Greetings to everyone.

That position demonstrates a disadvantage of the implementation. If the engine takes the pawn on move 33 it is a drawn evaluation (At least according to stockfish) any other move leads to checkmate against the engine, as you chose somewhat lower it had to go for the lower evaluation that results in a mate

[Vinvin]

May be in this tread : forum3/viewtopic.php?t=60709

Thanks, Vinvin. It's a great thread! I was looking for something like this before writing but I didn't see it. A good bunch of recommendations for testing (I don't know if I'll find all those engines).

3 more similar threads :
forum3/viewtopic.php?t=80708
forum3/viewtopic.php?t=54132
forum3/viewtopic.php?t=32698

[midgard]

3 more similar threads :
forum3/viewtopic.php?t=80708
forum3/viewtopic.php?t=54132
forum3/viewtopic.php?t=32698

Thanks again, Vinvin. I understand that this is a common and repeated question in the forum. It is very useful to me, I will take advantage of as much information as I can, especially by modifying engine parameters. I hope I haven't bothered you with the question.
Best regards.

[Vinvin]

3 more similar threads :
forum3/viewtopic.php?t=80708
forum3/viewtopic.php?t=54132
forum3/viewtopic.php?t=32698

Thanks again, Vinvin. I understand that this is a common and repeated question in the forum. It is very useful to me, I will take advantage of as much information as I can, especially by modifying engine parameters. I hope I haven't bothered you with the question.
Best regards.

No problem !
I like sacrifices in chess and I think that Gambit Tiger and Rebel Anti-GM were 2 very good experiences.
https://www.rebel.nl/r11-rt2.htm
https://www.rebel.nl/rebel10c.htm#ANTI-GM

My best !

[mclane]

Yes from Paris world computer chess championship christophe therons engine Chess Tiger made good progress.
He even topped the rating lists at that time.
Its good that we still can buy chess tiger for IOS.

https://www.chessprogramming.org/WMCCC_1997

There tiger was 27th from 34.

But THEN after paris Christophe made big progress.


I think the reason Christophes engine was overtaken had to do with multi processing.
Tiger is a single cpu engine and from the moment the others had more cores, tiger was beaten by 2, 4 or 6 cores.

[Dann Corbit]

Komodo is not to be overlooked for wild sacrifices.
If you do a web search for Komodo sacrifice tcec you will find some interesting examples including a queen sacrifice that drew a lot of conversations.

[Engin]

Good afternoon. I am a chess player but I have always liked to face engines. I am a bit tired of engines that play like rocks. Even when you weaken them they play very strong and at some point there is a mistake that is difficult to see.

I have discovered the Patricia engine and it is a delight, it attacks, sacrifices and destroys me like a hammer against a poppy. I weaken it to a level similar to mine and I enjoy the games very much. So I have asked myself if there are engines that play like kamikazes. Engines that forget about the pawn structure, or the safety of their king. I don't care if the engine is already that aggressive or if I have to change some parameters.

I hope the question is not too silly and that I have some answer.

Thanks in advance.

There are maia human-like networks for leela that playing strength from 1100-1900 here:
https://lichess.org/@/lichess/blog/intr ... e/X9PUixUA

its playing really like a human and not like a monster computers that shrink his strength like massakre legs or arms, sometimes very strong or sometimes very weak.

[midgard]

Komodo is not to be overlooked for wild sacrifices.
If you do a web search for Komodo sacrifice tcec you will find some interesting examples including a queen sacrifice that drew a lot of conversations.

Very interesting. I found among others this fantastic queen sacrifice (for 3 minor pieces but a sacrifice all the same). Thanks for the information, Dann.

There are maia human-like networks for leela that playing strength from 1100-1900 here:
https://lichess.org/@/lichess/blog/intr ... e/X9PUixUA

its playing really like a human and not like a monster computers that shrink his strength like massakre legs or arms, sometimes very strong or sometimes very weak.

I knew Maia and often played against this engine. In fact, it was one of my favorites until I found Patricia. Thanks in any case.