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There are 0 results for Raj Kri in the games.
There are 18 results for Raj in the forum.
Thibault de Vassal (2006-07-27 11:20:24)
ajout en cours ;)
ce ne sera pas dans la liste ELO mais dans la liste des joueurs (classés par ordre alphabétique).
http://www.ficgs.com/directory_players.html
je suis en train de le rajouter, ça devrait être en ligne d'ici quelques minutes...
Thibault de Vassal (2006-12-01 11:19:43)
Deep Fritz, Rybka & future
The Chess Challenge 2006 in Bonn between classical world champion Vladimir Kramnik and chess engine Deep Fritz 10 confirms (who ignored ?) the best chess programs can rivalize with the world champion in a match, but it first shows us these calculating monsters still have weaknesses.
Question is : What are the real improvements in Fritz 10 compared to Fritz 9 (engine speaking only) ?
Here is what I think about chess engines nowadays (Fritz 10, Shredder, 10, Junior 10, Hiarcs 10 and particularly Rybka 2.2) :
The way of think to play correspondence chess is (or should be) mostly human one combined with a chess engine algorithm. We follow the tree of moves like a program with our selective algorithm (much better than chess engines), applying our judgement of the position when necessary only. The point is we evaluate moves and we almost never evaluate a position twice.
Chess engines are very good analysis tools but are surprisingly not designed to be very good chess players. I think a major improvement in chess engines should be recognition of 'sufficient moves' : ie. it is no worth to always find the best move at a particular point of the tree, this reflection time could be used later... It depends on the evaluation of the position, on the clocks... Iterative model is quite basic (in a game at least !).
Another point is recognition of traps. This is the start of psychology in chess engines, and basics of the art of war. It first depends on who your opponent is, and on the clocks too. Finally, at the end of the tree, chess engines evaluate positions, but how many evaluate moves ? .. Speculative moves were a step, but it first shew chess engines were not able yet to see what move is worth to be analysed really deeper, consequently creating a 'human' weakness, particularly against some other chess engines.
I don't know how Rybka works, but as far as I read about this one that calculates much less positions (about 10 times) than Fritz, I wouldn't be surprised that Vasik Rajlich had implemented a better approach of human way of think, which is undoubtly the future of chess engines.
A good 'centaur' in ie. Playchess rapid tournaments is first a good choice between Chessbase engines according to the position and clocks. Fritz qualities probably apply best in standard games, where clocks are really designed for him. Among Chessbase engines, Hiarcs is probably the best Blitz player and could be the best correspondence chess player (even if it isn't the best CC tool for humans). Rybka is probably a kind of centaur itself (sorry, herself ;)), knowing when to use (in the tree !) brute force and more selective approachs - not to be compared to Hydra or Deep Blue which, on contrary, use most brute force.
My conclusion is chess engines have much to learn from humans yet, we'll see a Rybka 5 and Fritz 13, with much better results against other chess engines, but their results shouldn't increase a lot against the best humans in future. Finally, it will never be a good correspondence chess player :)
My two cents.
If I find time, I'll continue to implement my own chess engine..... but it's a lot of work :/
Thibault de Vassal (2007-02-07 00:52:58)
Rybka 2.3
An interesting thread about Rybka 2.3 (should be available on february 12) and his new features, described by Vasik Rajlich. In a few words : stronger, new chess knowledge, better search algorithm, better positional play, bug fixes and an interesting feature called "randomizer" :
Quote : "You can put Rybka into a mode where she will play against herself over and over from the same position without repeating variations - she will systematically explore the space of possibilities in the variation, branching from the previous games at later and later points. It's an effective way to get a Monte-Carlo-based evaluation of a position."
http://rybkaforum.net/cgi-bin/rybkaforum/topic_show.pl?tid=180
Thibault de Vassal (2007-02-10 03:08:52)
Rybka, Fritz and future...
Computerchess is definitely an exciting challenge... The community is fast-growing, new versions of chess engines appear every day, many dream to be the next Vasik Rajlich and to produce an engine that would beat the well-known Chessbase engines and the famous Rybka.
These days, I had a look at Fruit 2.1, TogaII and Crafty source code that are available to download, and started to implement new search & evaluation functions. It's quite easy to understand why chess programming is so addictive, so much done and so much to do... finally I did not enter this mad race without an ending, probably for the same reasons Anthony Cozzie (the author of Zap! Chess Zanzibar) and many others retired.
However here are my feelings about future of chess engines, and the fight that just started between most probably Chessbase engines (Fritz, Shredder, Junior and Hiarcs) and a new era of chess engines that started with Rybka...
First, it's quite obvious to me that Rybka (now Rybka 2.3) is only another one of a long series of chess engines always stronger than each others ! .. I expect the next ones to reach 50, 100 then 200 points more (and maybe more) on the next chess engines elo rating lists, a scale that definitely can't be compared to human elo rating list ! .. Several reasons to this : (1) Chess engines are human killers at standard time controls, but chess engines are far to play perfect chess yet. (2) The way ratings are calculated.
Rybka taught us several things IMO :
- Algorithms and evaluation functions are no more enough. Now chess engines have to play chess, not only search a tree of chess positions... That's probably what Rybka brought to computerchess. Since Fruit 2.1 & Toga II source code is available, and computerchess community is constantly discussing improvements in algorithms, evaluations of positions and new ideas, to implement a chess engine becomes easier so I have no doubt that new very strong chess engines like Rybka will come.
- To become famous, a chess engine must 'also' beat his rivals. I first thought that Rybka was designed to be an engines killer only (at least before to be an analysis tool) with some tricks exploiting most engines weaknesses. No, Rybka is also a great UCI engine, simply stronger and with many options & features. Like Vasik Rajlich, who is engineer and international chess master, you'll have not only to think like an engineer to create such an engine. However I still don't think it is the best analysis tool for correspondence chess, it doesn't play really better chess and in all cases it is not enough. More, Rybka 3, 4, 5 shouldn't influence correspondence chess (maybe even human vs. machine) much... Computerchess influences computerchess first.
It's written sometimes that the strongest chess engines could reach a IM, even GM level at correspondence chess. I definitely disagree with that, at least for the moment (it will take a long time yet), but as chess engines results tend to approach correspondence chess ones (means more and more draws), I do think chess engines have much to learn from correspondence chess players way of thinking, meaning : A more psychological approach, bonus for traps detection. Evaluate moves, not only positions. A more complex search, not 'only' iterative (brute force is definitely useless). No more anti-human style, speculative moves (=weakness, ie. Deep Junior) for speculative results against strongest chess engines, draws are prefered. To avoid positions not understood by the engine. Longer games, closed games (if supported)... Opening books should look like correspondence chess GMs ones (of course according to the engine's style of play) and no more been made of FIDE GM games. A better time management... Future of computerGo may teach to computerchess about some evaluations.
A chess engine must play good moves AND try to win (which is not always the same). It seems Fruit & Rybka play solid and are waiting to exploit their opponent's weaknesses thanks to a better "chess" algorithm/knowledge. As far as I have seen, Shredder & Fritz still have the best 'eye', they see far but fuzzy. Quite the same about Fruit & Toga developped by a great engineer, Fabien Letouzey : Less chess knowledge but an improved algorithm. As for Rybka, a great chess knowledge and probably a smarter algorithm (not better, smarter !) were probably enough already. The future best chess engines will be made by good chess players...
An interesting point is it could be not so easy, maybe even nonsense, to create the best analysis tool that would also obtain the best results against other chess engines. My first prediction is Rybka won't be the top rated chess engine ever, hundreds of new ideas will appear in all parts of chess programming, slowly breaking Rybka secrets, then speed will be a factor again. Deep Fritz, Junior, Fruit or Hydra are most probably the core of the next generations of chess engines... but there's a lot of work yet :)
My two cents.
Thibault de Vassal (2007-02-16 02:11:07)
Rybka 2.3
More info about Rybka 2.3
www.rybkachess.com/index.php?auswahl=Rybka+2.3+readme
The new engine should be a bit stronger than the previous version, Vasik Rajlich ran a blitz match (1' + 1") between Rybka 2.3 and Rybka 2.2n2 and got a result of: +245 =607 -193 (52.5%, +17 Elo).
Thibault de Vassal (2007-03-03 17:12:57)
Rybka 2.3.1
Rybka 2.3.1 beta is available, Rybka 2.3.2 is announced, quite hard to follow Vasik Rajlich's work day after day :) .. Rybka forum is very active and it seems Rybka 2.3.1 is the strongest Rybka and the strongest chess engine today !
I hope Fritz, Junior, Shredder and Hiarcs authors are working hard...
http://rybkaforum.net/cgi-bin/rybkaforum/topic_show.pl?tid=472#fp
Thibault de Vassal (2007-03-05 10:19:11)
Playchess Freestyle Tournament
Thanks for info, Samy...
What a crosstable, no less than 17 players finishing with 5,5 / 8
Petr, I understand your frustration, anyway that's why I play correspondence chess only over the internet. Losing a game thanks to a connection lost or strange rules is not interesting much :/
Several remarks while looking at the final crosstable :
The winner uses Rybka 2.3 mp, the others too :) .. Rybka's author (Rajlich) scores 5 out of 8 (pos. 18)
With Rybka getting stronger and stronger at fast time controls, Advanced Chess will probably become Computer Chess and finally Rybka Chess very soon. 1 hour + 15 sec is no more interesting.
I recognize some famous 'names' used on the defunct KasparovChess.com, King Crusher (5 / 8), Deep Thunder (3,5 / 8)... Correspondence Chess GM Mikhail Umansky scores 2,5 / 8... and last but not least, french forums superstar Olivier Evan scores 2,5 / 7 :)
Thibault de Vassal (2007-03-29 05:10:48)
Cas particuliers
Je rajoute quand même qu'il y a effectivement déjà quelques cas un peu complexes pour lesquels je ne saurais pas si je dois ou non appliquer une pénalité... Il y aura de toutes façons toujours des perturbations de temps à autre. Une chose est sûre, dans ton tournoi il n'y a pas que des "serial droppers" ;)
Thibault de Vassal (2007-06-06 19:12:00)
Rybka: $100,000 challenge to FIDE
The author of Rybka - undoubtly the strongest chess engine (Rybka 2.3.1), Vasik Rajlich challenges FIDE for a $100,000 match between Rybka and the winner of the "Ultimate Computer Chess Challenge 2007" between Deep Junior and Deep Fritz, that just started (first game drawn) :
http://rybkaforum.net/cgi-bin/rybkaforum/topic_show.pl?tid=1126
Also the match offer to grandmasters is more and more interesting :
http://rybkaforum.net/cgi-bin/rybkaforum/topic_show.pl?tid=794;pg=1
I doubt Chessbase or FIDE would accept to organize & play such a match, even if Fritz 11 or 12 can beat the next Rybka... The war of engines is not on the chessboard nowadays but that's quite interesting to follow anyway :)
Thibault de Vassal (2007-06-14 18:14:03)
Rybka 2.3.2
Just after President's cup "Ultimate computer challenge" finished, Vasik Rajlich threw a new Rybka 2.3.2 in the chess engines arena... (partly explains the $100,000 challenge to Ilyumzhinov a few weeks ago)
Once more, Rybka 2.3.2 seems stronger than her predecessors with indcredible results (blitz time control) against Hiarcs 11.1, Zap chess Zanzibar, Shredder and so on... Maybe +35 elo points compared to Rybka 2.3.1 !
http://rybkaforum.net/cgi-bin/rybkaforum/topic_show.pl?tid=1264#fp
http://www.rybkachess.com
Thibault de Vassal (2007-06-18 15:23:11)
Rybka is world champion !
Rybka is the new World Computer Chess Champion, with the score of 10 out of 11. Congratulations to Vasik Rajlich and Rybka team !
http://www.grappa.univ-lille3.fr/icga/news_item.php?id=25
Albert H. Alberts (2007-06-25 14:36:49)
World Computer Chess Championship (WCCC)
All: JUNIOR has won over Fritz in Elista.RYBKA wins Olympiade Amsterdam. It got me thinking: instead of being an 'engine-to-engine contest can it be that the whole thing is a book-to-book contest? The program that has the best opening book with novelties will come out on top, invariant from the engine. Is that why RYBKA is so good? IM V.Rajlich? The future WC will be the program with the best book. The future WC tournament chess will be the one who knows this book. Maybe they will be one and the same person? Great news for the sport I think. Greetings Albert H. Alberts,Amsterdam www.howtofoolfritz.com
Dirk Ghysens (2007-08-30 01:56:16)
Poland
Tomasz Markowski
and
"rybka" Iweta Rajlich.
Thibault de Vassal (2007-09-10 22:42:32)
chess engines
First of all, every chess engines is a choice, ie. about selectivity, and has consequences & weaknesses in particular positions. Fruit/Toga algorithm is really good but it has probably still much less chess knowledge than Rybka. I think Rybka's algorithm is really better also, Vasik Rajlich added some "human features" while other programs still think about chess like mathematics.
Rybka changed correspondence chess because Fritz or Junior (very strong chess machines) added to a good chess player makes a good centaur while Rybka is "almost" a centaur itself... Consequently a weak chess player can reach quite easily a 2100/2200 rating. That's the main reason...
Of course Rybka will always make some bad moves, but it/she builds an advantage move after move against other engines in most cases in 'calm' positions. HIARCS, that was told during a long time to think most like a human, was not a strong 'chess machine'. I don't know much about Hiarcs 11/12, but Rybka is a major improvement in this way IMO.
Normajean Yates (2008-07-11 02:21:59)
Osho Rajneesh's last sermon in the USA
[before he was deported]
"The party is over. Go home."
Thibault de Vassal (2008-07-18 14:24:09)
Chessbase Deep Rybka 3
Chessbase, who distributes the best chess engines (Fritz, Shredder, Junior, Hiarcs, Zappa...) now also distributes the little fish : Rybka 3 and Deep Rybka 3 are available.
http://www.chessbase.com/newsdetail.asp?newsid=4772
Rybka 3 (by Vasik Rajlich) is the reigning computer world champion and should be at least 80 points stronger than the previous version Rybka 2.3.2
Did anyone test it already ? What about the improvements (particularly Monte Carlo Analysis in endgames) ?
Rybka 3 book with 3,387,966 positions (260 MB) is also available.
Thibault de Vassal (2008-08-01 04:19:01)
Rybka 3 encrypted
It seems that Rybka 3 would be actually even stronger that the commercial version of Rybka 3, Rybka team (V. Rajlich, L. Kaufman) explains that the compiled code was encrypted, as a consequence the engine would lose about 60 ELO points in that process.
A smart move by Vasik Rajlich to prevent his engine to be cracked by using simple decompiling tools. (ICE may help the most motivated though)
http://rybkaforum.net/cgi-bin/rybkaforum/topic_show.pl?tid=5184
Thibault de Vassal (2009-01-04 14:14:38)
Rybka 4
Vasik Rajlich wrote a few comments on what can be expected from the Rybka engine/team in 2009 :
http://rybkaforum.net/cgi-bin/rybkaforum/topic_show.pl?tid=9199
Three engine releases are planned in 2009:
* Rybka 3+ - Rybka 3 playing strength, with bugfixes and cosmetic improvements, for Rybka 3 customers
* Pocket Rybka 3 - published by Convekta/ChessOK, packaged with their Pocket Champion interface, conforms to S. Tsukrov's Pocket-UCI protocol
* Rybka 4 - better search, better eval, new analysis features
"Our tournament goal for 2009 is to win a top freestyle event in 100% automated mode. (...)"
Very interesting, a new challenge for Eros :)
There are 4 results for Raj in wikichess.
Premraj Natarajan (1800)
e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Bg5 e6 f4 Qb6 Qd2 Qxb2
When black captures b2 pawn with the queen its called the poisoned pawn and hence white is supposed to win because of this early sacrifice.
This stage its still I believe is unclear.
============
Contributors : Rémi Marois, Premraj Natarajan
Ilmars Cirulis (1543)
e4 d6 d4 Nf6 Nc3 g6 f4 Bg7 Nf3 c5 e5 Nfd7 Bc4 O-O e6 Nb6 exf7+ Kh8
Velimirovic - Rajkovic, 1971
============
Contributors : Ilmars Cirulis
Premraj Natarajan (1800)
e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Bg5 e6 f4 Qb6 Qd2 Qxb2 Rb1 Qa3 e5 dxe5
This one is a transposition move so it can be achieved even after playing h6 and divert white's bishop.
============
Contributors : Premraj Natarajan
Premraj Natarajan (1800)
e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Bg5 e6 f4 Qb6 Qd2 Qxb2 Rb1 Qa3 e5 dxe5 fxe5
This is the obvious and main continuation for white.
============
Contributors : Premraj Natarajan
... or search for Raj in FICGS via Google
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