CyberNezh BOT now at lichess.org

[supersharp77]

On which engine CyberNezh based?

Well, Rodent has been a source of inspiration, conceptually. I would look at Nezh as being rather based on great unsung attacking heroes from the past such Rashid Nezhmetdinov and Nicolas Rossolimo, with a nod to Tal and Alekhine's genius as well.

Its strength is substantial and it can take care of any opposition below 2800 Elo, be it human or engine. One of the goals was to reach a level of strength equal to or slightly stronger than the best human GMs. Even more important than strength is the swashbuckling, daring style, of course. Nezh is fearless and can take enormous risks in pursuit of winning. There's no 'draw death' to worry about.

[pgn]
[Event "Rated Blitz game"]
[Site "https://lichess.org/zUGsO9Lg"]
[Date "2020.04.04"]
[White "Nezh-BOT"]
[Black "Alayan"]
[Result "1-0"]
[UTCDate "2020.04.04"]
[UTCTime "23:11:48"]
[WhiteTitle "BOT"]
[Variant "Standard"]
[TimeControl "300+3"]
[ECO "B30"]
[Termination "Normal"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 Qc7 4. O-O a6 5. Bxc6 Qxc6 6. d4 e6 7. Re1 Nf6 8. e5 Nd5 9. c4 Nb6 10. Nbd2 d5 11. exd6 Bxd6 12. Ne4 Nxc4 13. b3 Nb6 14. Bh6 gxh6 15. dxc5 Bxc5 16. Ne5 Qc7 17. Rc1 Qxe5 18. Rxc5 Qg7 19. Nd6+ Ke7 20. Nf5+ Kf6 21. Qa1+ Kg6 22. Nh4# 1-0
[/pgn]

Hats off to Alayan for not being afraid to take on Nezh. The lightning bolt is 14. Bh6!!, a move that leaves a lasting impression.

[pgn][Event "Blitz"]
[Site "https://lichess.org/zUGsO9Lg"]
[Date "2020.04.04"]
[Round "1"]
[White "CyberNezh-Engine-Bot"]
[Black "Alayan"]
[Result "1-0"]
[ECO "C84"]
[WhiteElo "2700"]
[BlackElo "2000"]
[Annotator "Ross-SF Ipman SE3"]
[PlyCount "43"]
[EventDate "2020.04.04"]

1. e4 c5 2. Nf3 Nc6 (2... d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 {
Of Course Najdorf Is Best!}) (2... a6 ! 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e5 !)
3. Bb5 !? {A positional move..aiming for a Ruy Lopez..} Qc7 ! (3... e6 !? 4.
O-O Nge7 !) 4. O-O a6 (4... Na5 !? 5. Nc3 a6 6. Be2 e6 !?) 5. Bxc6 Qxc6 ?! (
5... bxc6 ! 6. Nc3 Nf6 7. e5 Nd5 8. Ne4 $14) 6. d4 $1 e6 (6... cxd4 $1 7. Nxd4
Qc7) 7. Re1 Nf6 (7... cxd4 8. c3 !? {SF suggests..}) 8. e5 Nd5 9. c4 Nb6 (9...
Nc7 ! 10. dxc5 Bxc5 $14) 10. Nbd2 d5 (10... cxd4 11. b3 ! d5 12. exd6 Bxd6
13. Ne4) 11. exd6 Bxd6 12. Ne4 (12. b4 !! {
spotted instantly by SF and Yours truly..} cxb4 13. c5 Bxc5 14. dxc5 Nd5 15.
Nb3) 12... Nxc4 (12... O-O !! {sensing the danger...}) 13. b3 Nb6 (13... O-O
14. bxc4 cxd4 15. Qd3 !?) 14. Bh6 !? {
Not showing at all on my SF Ipman moves list...dunno} (14. dxc5) (14. Bb2) (14.
Nfg5) 14... gxh6 (14... O-O !! 15. Ne5 Qc7 ! 16. Nxd6 f6 17. Nxc8 Raxc8) 15.
dxc5 Bxc5 16. Ne5 Qc7 (16... Qb5 !? 17. Qf3 Rf8 18. Nf6+ Ke7 19. Nxh7 Nd7 !?)
17. Rc1 Qxe5 18. Rxc5 Qg7 19. Nd6+ Ke7 ?? (19... Kf8 !) 20. Nf5+ {
And Wins...} Kf6 21. Qa1+ Kg6 22. Nh4# 1-0[/pgn]


Not to rain too much on the CyberNezh Parade but of course needed to take a bit deeper look...has CyberNezh played some match games vs Open Tal? What was the result?... Thx AR

[BrendanJNorman]

Not to rain too much on the CyberNezh Parade but of course needed to take a bit deeper look...has CyberNezh played some match games vs Open Tal? What was the result?... Thx AR

400-500 Elo difference in strength.

OpenTal was designed (by me) for patzers (like me) to train against, while Nezh seems around 3000 Elo.

[supersharp77]

Not to rain too much on the CyberNezh Parade but of course needed to take a bit deeper look...has CyberNezh played some match games vs Open Tal? What was the result?... Thx AR

400-500 Elo difference in strength.

OpenTal was designed (by me) for patzers (like me) to train against, while Nezh seems around 3000 Elo.

Well.....based on that game analysis.....can't see 3000+....(or even 2800+) at least not yet...Thx AR

[Alayan]

I'm just an average blitz player, I had not much chances against an engine... I watched live Nezh against another bot, and was sent a challenge. I had no illusion about my chances, but I accepted by curiosity.

[BrendanJNorman]

Not to rain too much on the CyberNezh Parade but of course needed to take a bit deeper look...has CyberNezh played some match games vs Open Tal? What was the result?... Thx AR

400-500 Elo difference in strength.

OpenTal was designed (by me) for patzers (like me) to train against, while Nezh seems around 3000 Elo.

Well.....based on that game analysis.....can't see 3000+....(or even 2800+) at least not yet...Thx AR

Oh ok. I'm just basing my estimation on game results against other engines, which Carl has previously posted.

[supersharp77]

Not to rain too much on the CyberNezh Parade but of course needed to take a bit deeper look...has CyberNezh played some match games vs Open Tal? What was the result?... Thx AR

400-500 Elo difference in strength.

OpenTal was designed (by me) for patzers (like me) to train against, while Nezh seems around 3000 Elo.

Well.....based on that game analysis.....can't see 3000+....(or even 2800+) at least not yet...Thx AR

Oh ok. I'm just basing my estimation on game results against other engines, which Carl has previously posted.

Meanwhile Open Tal shows fantastic promise in both Shredder and Banksia Gui's and limited progress in Fritz (Engine name and ID in wrong position for recognition by GUI..from the beginning)....Next possible test Chess Tal vs Open Tal Match (couple of games) "Let Just see shall we"....should be fascinating...

[carldaman]

Not to rain too much on the CyberNezh Parade but of course needed to take a bit deeper look...has CyberNezh played some match games vs Open Tal? What was the result?... Thx AR

400-500 Elo difference in strength.

OpenTal was designed (by me) for patzers (like me) to train against, while Nezh seems around 3000 Elo.

Well.....based on that game analysis.....can't see 3000+....(or even 2800+) at least not yet...Thx AR

Oh ok. I'm just basing my estimation on game results against other engines, which Carl has previously posted.

Brendan is basically right. I estimate it to be somewhere around 2800-2900 Elo CCRL, but things can vary from game to game due to the intrinsic volatility of its risky style, or based on time control.

https://lichess.org/@/Nezh-BOT/all

[carldaman]

A new blitz game (5 0) played today vs a strong human:

[pgn]
[Event "Casual Blitz game"]
[Site "https://lichess.org/cGMhvfNQ"]
[Date "2020.05.07"]
[Round "-"]
[White "Z3NS"]
[Black "Nezh-BOT"]
[Result "0-1"]
[UTCDate "2020.05.07"]
[UTCTime "18:07:26"]
[WhiteElo "2363"]
[BlackElo "2551"]
[BlackTitle "BOT"]
[Variant "Standard"]
[TimeControl "300+0"]
[ECO "D01"]
[Opening "Queen's Pawn Game: Chigorin Variation"]
[Termination "Normal"]

1. d4 Nf6 2. Nc3 d5 3. Bf4 Bf5 4. e3 e6 5. Nf3 Bd6 6. Bxd6 cxd6 7. Nh4 Bg6 8. Nxg6 hxg6 9. Be2 Nc6 10. O-O Kf8 11. h3 Ne7 12. a4 Rc8 13. a5 a6 14. Qb1 g5 15. Qa2 Nf5 16. Qb3 Qe7 17. Rfd1 g4 18. hxg4 Ne4 19. Nxe4 Qh4 20. Ng3 Qh2+ 21. Kf1 Qh1+ 22. Nxh1 Rxh1# 0-1
[/pgn]

A typical game with Black, where things look a little quiet, but under the surface lurks great danger. The position is built up slowly, but once ready, the axe falls with great ferocity. Of course, not everything may be entirely sound, especially at faster time controls, but enough to dazzle even a strong opponent.

[carldaman]

Very telling is move 10, where White castles, while Black responds with Kf8!, keeping the Rook where it belongs on the semi-open h-file. This proved decisive. Pretty basic you might say, but a 2300+ human opponent walked right into it.

[carldaman]

ShashChess 5.0 (last stylistic ShashChess) finds Bh6 instantly, thinks capturing the sacrificed Bishop is a mistake:

[d]r1b1k2r/1p3ppp/pnqbp3/2p5/3PN3/1P3N2/P4PPP/R1BQR1K1 w kq -

Engine: ShashChess 5.0 64 (128 MB)
by A. Manzo
17/32 0:02 +5.92 14.Bh6 gxh6 15.dxc5 Be7 16.Ne5 Nd5 17.Qh5 Rf8 18.Nxc6 bxc6 19.Nd6+ Bxd6 20.cxd6 Rg8 21.Qxh6 Bd7 22.Qxh7 O-O-O 23.Qxf7 Kb7 24.Rac1 c5 25.h4 Kb8 (8.055.774) 2787
-----

Yes, other engines may find moves like Bh6 easily, but the more relevant question is 'can other engines reach those positions in the first place'? This is the same distinction that great attacker Rudolf Spielmann made between himself and the legendary Alekhine, where he acknowledged that while he could find the same brilliant shots as Alekhine, reaching the same positions was an entirely another level of skill.

Here's a fresh win vs a master:

[pgn]
[Event "Rated Blitz game"]
[Site "https://lichess.org/CLzKn17H"]
[Date "2020.05.17"]
[Round "-"]
[White "Nezh-BOT"]
[Black "r*****"]
[Result "1-0"]
[UTCDate "2020.05.17"]
[UTCTime "17:42:23"]
[WhiteElo "2629"]
[BlackElo "2339"]
[WhiteRatingDiff "+3"]
[BlackRatingDiff "-1"]
[WhiteTitle "BOT"]
[BlackTitle "NM"]
[Variant "Standard"]
[TimeControl "300+3"]
[ECO "A45"]
[Opening "Indian Game"]
[Termination "Normal"]

1. d4 Nf6 2. Bf4 e6 3. e3 Bd6 4. Bg3 O-O 5. Bd3 b6 6. Nf3 Bb7 7. Nbd2 Bxg3 8. hxg3 h6 9. e4 d6 10. Qe2 Nc6 11. e5 dxe5 12. dxe5 Nd7 13. O-O-O Nc5 14. Ne4 Nxd3+ 15. Rxd3 Qe7 16. Nf6+!! gxf6 17. Qd2 1-0
[/pgn]

https://lichess.org/@/Nezh-BOT/all

"What am I supposed to do, trade in my romantic style and become a hunter of points at any price? No, I will not do so. I will fight for the art of chess. I shall not turn into a monster" - Nicolas Rossolimo