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A cheater at Gameknot.
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riaannieman
16-Feb-24, 04:54

We don't know yet, do we? That is why I am running the tool.
wasatch
16-Feb-24, 05:28

Ok, to statistically test a data set of Elo game results, you should be using probably a chi-square test linked to the Gaussian distributed differences of expected ELO results vs the actual results. If your “model” is not venturing in this direction, I doubt you’ll find much as catseye won games he should not have and also lost games he shouldn’t have to maintain his ~1500 rating. As an aside, examining the graph of the results you will see a fairly tight distribution of scores, getting above 1600 once while averaging 1532. Normal Elo results vary much wider than this and usually indicates Elo manipulation and cheating techniques.

However, the test I used is the same Chess.com uses, i.e. how many error-free moves a 1500 player can make over a set of games. If you can find 5 error free games of approx. 25 move games, the “testee” is using an aid, either a high rated player or a machine. For this, I used the GK computer and posted the results earlier in this thread.

There is a write up somewhere on the internet…or a least there once was on this method.

Btw, this is essentially the way Hans Neimann was found to be cheating in his early days at Chess.com…and he admitted to it. HN is an existential threat to the entire professional chess world.

Also, Btw, I was a military operations research analyst for 30+ years building decision models for General Staffs using statistical data sets. I also have a Mathematics degree from an American University.
riaannieman
16-Feb-24, 06:53

Well then! You are well beyond me! You have skills that I only dream of. I do not have those mathematical skills or education. My plan was to use the statistics I get, do my analyses and find the answer to the best of my ability with the analyses I have done. But, using my algorithm machine, I can still do one thing and that is to identify with a high degree of probability the algorithm that he used. Will that help you at all?
riaannieman
16-Feb-24, 07:21

Sorry I have to expand on my previous post. I really do not have such a mathematical education at all. My analyses will be much simpler with nothing of anything you mention at all. I will simply identify the games where he cheated, the games where he didn’t, the games that he cheated a little bit but lost, the games where he cheated a little and won, and so on. Then I shall simply ‘draw’ these in a visual representation, with a value added on a tag on each which indicate the probability of him cheating in the particular game and the algorithm used. Lastly I shall arrange these in an order from minimum to maximum, or the other way around, and make a count.

In the past I assigned one of four values to games: 1/2, 1, 2 and 0. The higher the value the higher the probability of cheating, based on the result of the algorithm machine.

This is really a far cry from what you did. I wish I could do what you did. I really am jealous of your skills.
saguaro
16-Feb-24, 07:59

wasatch - GK program to find error-free games
Where can I find it, please. Thanks
lord_shiva
16-Feb-24, 10:08

Keep at It
The results will prove instructive, however they turn out. That catseye through private games is beyond dispute. Zero odds he tossed queens in consecutive private games right and left, without ever doing that in team games. The manipulation is blatant.

I received a message about the player’s team rating being higher than their ELO was another good clue, but in the history of games where this was the case I failed to detect obvious patterns.

I don’t look at players with negative team scores. If they are pitching team games to improve tournament ratings, that is a problem for their captain to address.

So the ratio of team score to games played is a tell. For catseye it was 80%, but I did not see this as an issue with only ten team games. It was the low ELO that excited my suspicion, and just the win/loss record alone seemed significant. But when I examined the lost games, as many of you did, the manipulation became indisputable. A queen toss followed by resignation a few moves later. Or in one case, a resignation while up seven points and decent positional advantage. This was in-your-face cheating to game lower rated opponent matches.

Please don’t direct Catseye’s attention to this thread, I do not wish to have it serve as a training ground for cheaters.
riaannieman
23-Feb-24, 03:59

Good day everyone. My algorithm machine returned the probability of using the AlphaZero algorithm with a probability of 94,6%. That is significantly high, and I for one shall make sure not to accept him in my team or in a team challenge as an opponent.

The next highest algorithm was Stockfish II, with a probability of 90,1%. This is also significantly high.

Remember that this is just an indication of the probability that an algorithm has been used. This is not a sure indication. To actually identify the algorithm with 100% certainty is a matter for the mathematicians, who can do the complex calculations. I cannot do that.
wasatch
23-Feb-24, 04:12

@saguaro

Sorry for the delay, I missed your message…I’m currently on vacation.

Go to the results page for a list of games the player has completed. In the win, lose or draw column you will see links (underlines)… open one of those. Then at the bottom of the game page you will see a computer results tab.

This exists so that you can analyze the results of your or anybody’s games. In my category I’m allowed 20 analyzed in a 30 day period. You can request analysis of any game on GK.
lord_shiva
23-Feb-24, 12:25

Thanks, R
Interesting results!
wasatch
03-Mar-24, 02:55

Catseye has been allowed to play again…
…in mini-tournaments.

GK is really a pain.

(Sigh)
dynamic-dv
03-Mar-24, 06:41

Money talks!
neurokarma
03-Mar-24, 07:09

catseye is playing for team Planet Chess
lord_shiva
03-Mar-24, 07:37

Planet Chess
The captain booted him. Resigning the games might unfairly penalize Planet Chess.
piero51
03-Mar-24, 10:00

Rating Manipulation
I check every day that catseye is not accepted by any team.
Piero IHS TEAM ITALIA Captain.
Ciao
wasatch
04-Mar-24, 03:36

@lord_shiva unfortunately, catseye will now probably use his remaining team games as “fodder” to keep his rating from rising, especially since he is allowed to now play in mini-tournaments.

He really is a menace for team play. You team captains really need to get the word out if you can so thank you @Piero for your vigilance.

He seems to be staying away from my mini-tournaments as he seems to not like dealing with me, but he will be messing up a number of other such tournaments in all likelihood.
ace-of-aces
06-Mar-24, 10:47

Please compare the similarities of basic human rights granted to 2 underdogs.
1. SCOTUS granted Donald Trump, the rights to run the Nov. 2024 presidential race.
2. GK granted Catseye, the rights to continue playing in GK chess games.
In spite of protesters who want them not to do so.
dynamic-dv
06-Mar-24, 10:50

Bullsh*t!!!!!!
lord_shiva
06-Mar-24, 14:29

Ace is Right
Both cheaters continue license to cheat. Though I’m not aware catseye has been reported anywhere but here.
king_0_nothing
06-Mar-24, 20:47

Ace, when you stack the court you are, in fact, the complete opposite of an underdog. However, I'd rather take this conversation up in another club and not drag this club into that arena. I'd be happy to continue in Fiat Lux.
apatzer
07-Mar-24, 04:49

king_0_nothing 06-Mar-24, 20:47
Ace just drops whatever post he wants to. There is a very good chance he won't even read your reply and challenge. Good luck getting him to have an actual discussion.
saguaro
07-Mar-24, 06:55

Reporting to GameKnot
There's nobody listening at the other end. I haven't got a reply in almost a year to several messages I sent.
ace-of-aces
17-Mar-24, 05:05

You may not like cat's eye,
youtu.be
but cats' songs appear to be joyful and entertaining. Watch the video and enjoy the music.
wasatch
17-Mar-24, 05:30

Ace-of-aces:
If catseye had stolen a few games from you, you might not be so cavalier in your defense of this scumbag…

And those videos are NOT his…
gmforsythe
17-Mar-24, 06:27

ace-of-aces re: Please compare the similarities of basic human rights granted to 2 underdogs.
Ace,

Please do not compare catseye to Donald Trump. Catseye cheated and was discovered to have done so beyond a reasonable doubt. The left attempted to stop Donald Trump from pursuing an election campaign by having states employ an arcane federal law which the states had no authority to do. That is what SCOTUS ruled.

GK has limited power to prevent cheaters. Word of mouth is the most effective tool against them as has been done on this forum. I note that other names have been brought up and discussed here, and defenses have been raised and considered. However, no defense for catseye's observed behavior has been offered. It is good that someone like that can be boycotted, as it spoils the enjoyment for those of us who prefer honest intellectual combat.
piero51
18-Mar-24, 04:46

UPDATE ON CATSEYE
Dear Captains, Good morning.
I want to update you on catseye. Basically, I want/need to create problems for him during his stay on gknot. Since gknot doesn't intervene (they didn't answer my three massages) so I do it myself. Catseye is playing 50 private matches, he hasn't signed up for any team since. I want to write to the organizers of the mini tournaments where he is playing informing them that he is a cheater.
If there is still someone who does not believe that he is a cheater, who lowers his rating on purpose by losing games voluntarily, I suggest that he go and see his last matches against opponents of 1200 and 1000 rating points: plant1deep, 994 and marcoporko 1281. Thank you for your attention.
Ciao
Piero IHS TEAM ITALIA Captain.
PS
I will continue to be vigilant, I must force him to leave gknot.
lord_shiva
18-Mar-24, 07:22

Interesting
game

White plays:
19. Nd6 Be7
20. Nxe6+ dxe6
21. Nxc8 Kxc8
22. Qxe6+ Nxe6

This passes up the somewhat obvious (and fun):
19. Nd6 Be7
20. Qe8+ Rxe8
21. Ngf7#

It would add fuel to the fire to know who challenged whom.
wasatch
18-Mar-24, 07:28

I spent a lot of time looking at catseye’s games and frankly I think he is about a 1000-1200 player when not using a computer. He is a stupid cheater, i.e. it’s pretty obvious what he is doing and he doesn’t try to hide anything; probably because he simply is not cleaver enough.

lord_shiva
18-Mar-24, 07:42



game

This was wasn’t obvious to me. It looks like he was struggling to survive. But it did end fast.

wasatch
18-Mar-24, 07:47

I have just sent it in to GK’s computer…let’s see what it thinks.

Btw, this is an opening I play on occasion, so somewhat familiar with it’s themes.
lord_shiva
18-Mar-24, 07:54

Earlier Example


The fairly obvious move here is Qa5+ and black picks up the white knight. Cat instead plays the obvious blunder Qe7+ to trade queen for knight and resign to the lower rated player.

Here is the plant1deep fen from above. It should be a puzzle.


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