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1 Temmuz 2011 Cuma
122. Çözümlemeli Oyun. Satranç Ligi. Birinci Tur
GM G. Agamaliev (2523) Yapi - IM C. Arduman (2349) Zeka [E92]
Turkiye Is Bankasi Satranc Ligi Konya (1), 28.06.2011
[Houdini 1.5a x64 (5s)]
E92: King's Indian: Classical: 6 Be2 e5: 7 dxe5, 7 Be3 and Petrosian System without 7...Nbd7 1.d4 Nf6 2.Nf3 g6 3.c4 Bg7 4.Nc3 0-0 5.e4 d6 6.Be2 e5 7.d5 a5 8.Bg5 h6 9.Bh4 Na6 10.Nd2 Qe8 11.a3 Bd7 12.b3 Nh7 13.0-0 h5 14.f3 Bh6 15.Kh1 Be3 16.Ra2 f5 17.exf5 gxf5 18.Qb1 [18.f4 exf4 19.Bxh5 Qe5 20.Nb5 Qh8 21.Be2 Nf6 22.Nf3 Rf7 23.Bxf6 Qxf6 24.b4 Rg7 25.Nbd4 axb4 26.axb4 Re8 27.Nc2 Qg6 28.Nxe3 fxe3 29.Nh4 Qg5 30.g3 Nxb4 31.Ra3 Na6 32.Rf4 Nc5 Eliet,N (2453)-Relange,E (2479)/France 2008/CBM 123 Extra/0-1 (46)] 18...Qg6 19.b4 axb4 20.axb4 Rae8N [20...Kh8 21.Nd1 Bg5 (21...Bb6 22.Re1 Rg8 1/2-1/2 (22) Olsen,H (2300)-Sylvan,J (2245)/Copenhagen 1997/EXT 1999) 22.Bxg5 Nxg5 23.Re1 Rg8 24.Bf1 Nh3 25.Nb3 Nf4 26.b5 Nb4 27.Rxa8 Rxa8 28.Nc1 Rg8 29.Ne3 Nh3 30.Re2 e4 31.Qxb4 exf3 32.Ra2 f2 33.Nd1 Qxg2+ 0-1 (33) Agamaliev,G (2520)-Maciejewski,M (2330)/Polanica Zdroj 2000/EXT 2001] 21.Re1 Qh6 22.Nf1 Bd4 23.Nb5 Bb6 24.Bd3 Qf4 Black prepares e4. Black threatens to win material: Qf4xh4 25.Bg3 White threatens to win material: Bg3xf4 25...Qh6 26.Bf2 [26.c5 dxc5 27.bxc5 Nxc5+/=] 26...Bxf2 27.Rxf2 Nf6 28.Nc3 [Instead of 28.Bxf5 Bxf5 29.Qxf5 Ng4 30.fxg4 Rxf5 31.gxf5 Nxb4-/+] 28...e4 29.fxe4 Ng4 30.Rf3 f4 31.Be2 Ne5 32.Rf2 Ng4 Black threatens to win material: Ng4xf2 33.Rf3 Ne5 Twofold repetition 34.Rf2 Ng4 1/2-1/2
Bitiş konumu:
34. ... Ag4
121. Çözümlemeli Oyun. Satranç Ligi. İkinci Tur
GM R. Kasimdzhanov (2685) ISEK - GM V. Spasov (2594) Tophane [A47]
Turkiye Is Bankasi Satranc Ligi Konya (2), 29.06.2011
[Houdini 1.5a x64 (5s)]
A47: 1 d4 Nf6 2 Nf3 b6: Torre, London and Colle Systems 1.d4 Nf6 2.Bg5 e6 3.Nd2 c5 4.e3 cxd4 5.exd4 Be7 6.Ngf3 b6 7.Bd3 Bb7 8.0-0 0-0 9.Re1 Nc6 10.c3 Nd5 11.Bxe7 Ncxe7 12.Bf1 [12.a4 a6 13.Ne4 Qc7 14.g3 f5 1/2-1/2 (14) Sokolov,I (2580)-Kindermann,S (2515)/Dortmund 1989/CBM 013] 12...Nf6N [12...f5 13.Ne5 (13.c4 Nf6 14.b4 Ne4 15.Qb3 Kh8 16.Rad1 Ng8 17.d5 exd5 18.cxd5 Ngf6 19.Nxe4 Nxe4 20.Bd3 Nd6 21.Ne5 Rc8 22.Qa4 Re8 23.Bf1 Kg8 24.Qb3 Re7 25.Nc6 dxc6 26.dxc6+ Kh8 27.cxb7 Rb8 Balashov,Y-Lebredo Zarragoit,G/Cienfuegos 1975/EXT 1998/1-0) 13...Qc7 14.Rc1 Rae8 15.c4 Nf6 16.Qb3 d6 17.Nef3 Ng6 18.c5 Bd5 19.Qa3 dxc5 20.dxc5 Ne4 21.Nxe4 fxe4 22.Nd2 Qf4 23.Qe3 bxc5 24.Rxc5 Qf6 25.Rc2 Ne5 26.Qg3 Qf5 27.Rc7 Petrosian,T-Taimanov,M/Leningrad 1960/URS-ch/[Moiseev]/1-0 (44); 12...Qc7 13.Rc1 Nf6 14.a4 d6 15.c4 Ng6 16.b4 a5 17.b5 e5 18.c5 bxc5 19.dxc5 dxc5 20.Nc4 Rfd8 21.Qb3 e4 22.Nfd2 Bd5 23.Qg3 Qe7 24.Nb6 Ra7 25.Nxd5 Rxd5 26.Nc4 Nf8 27.Qc3 Bryzgalin,K (2529)-Rozum,I (2414)/Voronezh 2008/CBM 125 Extra/1-0 (39)] 13.a4 Rb8 14.Ne5 Qc7 15.a5 bxa5 16.Qa4 Bc6 Black threatens to win material: Bc6xa4 17.Qa3 White threatens to win material: Qa3xe7 17...Ng6 18.Nxc6 Qxc6 19.g3 Prevents intrusion on f4+h4 19...a4 White has a new backward pawn: b2 20.Reb1 Rb7 21.Nc4 Qc7 22.Qxa4 Rfb8 23.Qa3 Rb3 24.Qc5 Qxc5 25.dxc5 White has new hanging pawns: b2, c3+c5. Black has a new backward pawn: d7 25...Ne4 26.c6 dxc6 27.Re1 Nf6 28.Rxa7 Nd5 29.Ra2 Nge7 30.Re2 g6 31.Rc2 c5 32.Ra5 R3b5 33.Ra6 R5b7 34.Bg2 Kg7 35.Rd2 Rc7 36.Kf1 Rbb7 37.Nd6 White threatens to win material: Nd6xb7 37...Rb8 38.Nc4 Rbb7 39.Nd6 Rb8 Twofold repetition 40.Ke1 h5 41.h4 Nf6 42.Nc4 Ned5 43.Ne5 [43.Rd1 Rd8+/=] 43...Nb6 44.Kd1 Nfd5 45.Bf1 Kf6 46.Nc4 Nxc4 47.Bxc4 Nb6 48.Be2 Ke7 49.Kc1 Nd7 50.Ra4 Nb6 51.Ra5 Nd7 52.Kc2 Rcb7 Black threatens to win material: Rb7xb2 53.Kb1 Rc7 54.Kc2 Rcb7 Twofold repetition 55.Kb1 Rc7 1/2-1/2
Bitiş konumu:
55. ... Kc7
120. Çözümlemeli Oyun. Satranç Ligi. İkinci Tur
IM A. Ipatov (2535) ITU - GM I. Nyzhnyk (2583) Gazi [D23]
Turkiye Is Bankasi Satranc Ligi Konya (2.6), 29.06.2011
[Houdini 1.5a x64 (5s)]
D23: Queen's Gambit Accepted: 3 Nf3 Nf6 sidelines 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.Na3 c5 5.Nxc4 Nc6 6.dxc5 Qxd1+ 7.Kxd1 Ne4 8.Be3 e6 9.Rc1 Nxc5 10.Nd4N [10.g3 b6 11.Bg2 Bb7 12.Kc2 Nb4+ 13.Kb1 Be4+ 14.Ka1 Rd8 15.Ne1 Bxg2 16.Nxg2 Be7 17.f3 0-0 18.Kb1 Nc6 19.Nf4 Nd4 20.Rhd1 Nf5 21.Bf2 g5 22.Ng2 Rxd1 23.Rxd1 Rc8 24.g4 Ng7 Eliseev,A (2489)-Zakharchenko,A (2395)/St Petersburg 2002/CBM 086 ext/1/2-1/2 (55)] 10...Nxd4 11.Bxd4 b6 Prevents intrusion on a5+c5 12.f3 Consolidates e4 12...Bb7 13.Kc2 Rd8 14.e3 f6 Secures e5 15.Be2 Be7 16.Rhd1 Kf7 Black loses the right to castle 17.Bc3 e5 18.e4 Ne6 19.b4 Nd4+ 20.Bxd4 exd4 Black has the pair of bishops 21.Kb3 g6 22.Nb2 Bd6 Black threatens to win material: Bd6xh2 23.Rxd4 Bxh2? [>=23...Bb8 would keep Black alive 24.Rxd8 Rxd8+/=] 24.Rxd8+- Rxd8 25.Rh1 [25.Rh1 Be5 26.Rxh7+ Kf8 27.Nc4+-] 1-0
23. Kxd4
Oyun ortasında bir hatalı hamle 23. ... Fxh2 ? oyunun kaybına neden oluyor. Halbuki 23. ... Fb8 savunma hamlesi oyunun sürmesini sağlardı. Benim gibi kulüp oyuncularının ya da A-C sınıfı oyuncuların sıklıkla yaptıkları türden bir hata olduğundan kaydetmek istedim.
30 Haziran 2011 Perşembe
119. Ulusal Kuvvet Derecesi
Temmuz ayı Ulusal Kuvvet Derecesi hesaplamaları tamamlandı. Listede, mükerrer kayıtlar dahil 54 489 (+233) oyuncu kaydı bulunuyor. 6 ayda gerçekleştirilen toplam turnuva sayısı 514 oldu. Aktif oyuncu sıralamasında, en çok lisanslı oyuncuya sahip il 4310 oyuncu (+41) ile İstanbul. 2172 (+3) oyuncu ile Antalya ikinci, 2070 (+11) oyuncu ile Ankara üçüncü sırada yer alıyor. Bu aşamada, satranç liginde takımlarla temsil edilen illerin aktif oyuncu sayılarını da belirtelim: Denizli 1371, Mersin 856, Manisa 1103, Adana 1540, Bursa 608.
FIDE tüm oyuncular listesi güncellendi. Bugün tarihiyle listede 288 612 (bir ay önce: 285 762) oyuncu yer alıyor. Oyuncu sayısı 2850 artmış.
FIDE tüm oyuncular listesi güncellendi. Bugün tarihiyle listede 288 612 (bir ay önce: 285 762) oyuncu yer alıyor. Oyuncu sayısı 2850 artmış.
118. Satranç Ligi. Oyunlar (1-3. Turlar)
Satranç Ligi'nde ilk üç turda oynanan 210 oyunu isim, unvan, elo, ukd, kulüp düzeltmelerini yapıp biraraya getirdim. Bunun nedeni üç turda ismi aynı kalan oyuncu sayısının parmakla sayılabilir olmasıdır. Umarım, oyunları canlı yayınlayanlar benden kopya çekerler de düzenli bir isim sistemine kavuşuruz!
Satranç Ligi. Oyunlar: 1-3. Turlar, PGN, CBV, 210 oyun, 167 oyuncu :
117. Satranç Ligi. Üçüncü Tur Sonrası Sıralama
116. Taktik Alıştırmalar Satranç Ligi. Birinci Tur IV
Hamle beyazlarda.
Hamle beyazlarda.
Hamle beyazlarda.
Hamle beyazlarda.
Hamle beyazlarda.
Hamle beyazlarda.
Hamle beyazlarda.
Hamle beyazlarda.
Hamle beyazlarda.
Hamle beyazlarda.
Hamle beyazlarda.
Hamle siyahlarda.
Hamle siyahlarda.
Hamle beyazlarda.
Hamle siyahlarda.
115. Satranç Ligi. Üçüncü Tur
18.25 ISEK - Yeşilköy : 5,5 - 4,5
18.29 Truva - Doruk : 5 - 5 Önceki lig şampiyonlarına da bu yakışırdı.
18.33 İTÜ - Çelikkol : 4,5 - 0,5
18.51 İTÜ - Çelikkol : 5,5 - 0,5. Böylece İTÜ maçı kazanmış oldu.
18.29 Truva - Doruk : 5 - 5 Önceki lig şampiyonlarına da bu yakışırdı.
18.33 İTÜ - Çelikkol : 4,5 - 0,5
18.51 İTÜ - Çelikkol : 5,5 - 0,5. Böylece İTÜ maçı kazanmış oldu.
114. Satranç Ligi. Üçüncü Tur
17.57 Deniz 5 - 4 öne geçti. Son maçta Melis'in performansı skoru belirleyecek. ISEK - Yeşilköy 4,5 - 4,5 oldu. Son maçta siyahlar bir piyon üstünlüğü kazanca çevirebilecek mi? Heyecanla izliyoruz.
18.03 Deniz - Tophane günün biten ilk karşılaşması : 5 - 5
18.09 Gazi - Zeka maçı da az farkla bitti: 5,5 - 4,5
18.11 Ezgi bir masada daha kazandı. Böylece skor 5,5 - 1,5 oldu. Üç masada oyunlar sürmesine rağmen maçın galibi belli oldu.
18.15 Yapı 6 - 2 öne geçti. Böylece maçın da galibi oldu.
18.17 İlginç bir olay gerçekleşti: Truva - Doruk maçında da skor 4,5 - 4,5 oldu. Son maçta Ş K P v Ş A 2P finali oynanıyor.
EKLEME:
18.21 Arıza giderildi: İTÜ - Çelikkol skoru : 3,5 - 0,5 oldu.
18.03 Deniz - Tophane günün biten ilk karşılaşması : 5 - 5
18.09 Gazi - Zeka maçı da az farkla bitti: 5,5 - 4,5
18.11 Ezgi bir masada daha kazandı. Böylece skor 5,5 - 1,5 oldu. Üç masada oyunlar sürmesine rağmen maçın galibi belli oldu.
18.15 Yapı 6 - 2 öne geçti. Böylece maçın da galibi oldu.
18.17 İlginç bir olay gerçekleşti: Truva - Doruk maçında da skor 4,5 - 4,5 oldu. Son maçta Ş K P v Ş A 2P finali oynanıyor.
EKLEME:
18.21 Arıza giderildi: İTÜ - Çelikkol skoru : 3,5 - 0,5 oldu.
113. Satranç Ligi. Üçüncü Tur
Maçlarda heyecan son haddinde.
17.37 Deniz - Tophane : 4 - 4 ; ISEK - Yeşilköy : 4,5 - 3,5
17.41 Gazi - Zeka : 5 - 2 Gazi önde gidiyor ve kazanca yakın.
17.45 Ezgi - THY : 4,5 - 0,5 Ezgi önde ve kazanca yakın.
17.47 Yapı - BJK : 4,5 - 1,5 Yapı önde ve kazanca yakın.
17.49 Truva - Doruk : 3,5 - 1,5 Truva önde ve kazanca daha yakın.
17.51 İTÜ - Çelikkol : ?? No data available so far
17.37 Deniz - Tophane : 4 - 4 ; ISEK - Yeşilköy : 4,5 - 3,5
17.41 Gazi - Zeka : 5 - 2 Gazi önde gidiyor ve kazanca yakın.
17.45 Ezgi - THY : 4,5 - 0,5 Ezgi önde ve kazanca yakın.
17.47 Yapı - BJK : 4,5 - 1,5 Yapı önde ve kazanca yakın.
17.49 Truva - Doruk : 3,5 - 1,5 Truva önde ve kazanca daha yakın.
17.51 İTÜ - Çelikkol : ?? No data available so far
112. Taktik Alıştırmalar. Satranç Ligi Birinci Tur III
Hamle beyazlarda.
Hamle siyahlarda.
Hamle beyazlarda.
Hamle beyazlarda.
Hamle siyahlarda.
Hamle siyahlarda.
Hamle beyazlarda.
Hamle beyazlarda.
Hamle siyahlarda.
Hamle siyahlarda.
Hamle beyazlarda.
Hamle beyazlarda.
Hamle siyahlarda.
Hamle siyahlarda.
Hamle beyazlarda.
Hamle beyazlarda.
Hamle siyahlarda.
111. Satranç Filmleri 1. Film Eleştirisi. Queen to Play
Queen to Play (Hamle Vezirde) filminin eleştirisi:
K: Yahoo! Alert Chess
Chess-themed 'Queen to Play' heady but humorlessMovie reviewThursday, June 30, 2011 By Barry Paris, Pittsburgh Post-Gazette
Better Living Through Chess is the message and the medium of "Queen to Play," a pleasant dramedy set very pleasantly in Corsica -- the perfect place for a game that serves not just as a metaphor for life, but as a form of mental Viagra. The intellectile dysfunction is suffered by Helene (Sandrine Bonnaire), a middle-aged chambermaid. One fine morning, while going about her occupational drudgery at an upscale resort, she spots an affluent young American couple playing chess on the veranda of their suite. "You can do the room now," says the beautiful woman (Jennifer Beals, in her negligee), "we'll be out here all morning."
'Queen to Play' 
2 1/2 stars = Average
2 1/2 stars = Average
- Starring: Kevin Kline, Sandrine Bonnaire.
- Rating: R in nature for one sex scene. In French and English with English subtitles.
Indeed they will, and Helene steals longing glances at the sexy interplay of their hands, on and off the elegant little pieces, jousting in a contest she doesn't remotely understand. Is it a kind of aphrodisiac? Those moves sure look like foreplay. Such playful bliss seems a far cry from Helene's interaction with her own proletarian mate (Francis Renaud) and their rebellious teenage daughter (Alexandra Gentil). The hubby is not interested in sex, or in the chess set she buys him for his birthday. With nothing better to do at night, she decides to learn it herself. But for that -- and self-fulfillment -- she will need the assistance of Dr. Kroger (Kevin Kline), a cranky American misanthrope-with-a-past, whose house she cleans once a week. Noticing a chess set there, she importunes him to tutor her and, after initial refusals, he agrees. It's just a handful of moves from the fine points of the game to the finer points of life: What most appeals to Helene is that the queen is the most powerful piece. Hitherto, her aspirations were nonexistent. She never even bothered to look at the breathtaking scenery all around her. Soon enough, thanks to putting her inner-queen into play, she moves from her humble self and humbling occupation toward a more confident reawakening. First-time director Caroline Bottaro adapted her own screenplay from Bertina Henrichs' novel "La Joyeuse d'echec" ("The Joyful Chess Player"), combining feminist allegory with social-class commentary. Chess? "It's not a woman's game," the male experts say, while her husband and daughter are jealous of the time she's devoting to it (and to Dr. Kroger), instead of them. "Can't I have something of my own?" she wonders, full of self-doubt and a recurring inferiority complex. Take a risk, and you may win. If you don't take a risk, you always lose. Rules are less important than exceptions. The ideas aren't new. The film depends on the thin shoulders, charmingly big nose and uneven teeth, and soulful performance of Ms. Bonnaire, whose rare smiles suddenly pop out and then disappear like a jack-in-the-box. Mr. Kline as the teacher-recluse is convincing, if not compelling, in a Bill Murray "Lost in Translation" kind of part -- his first French-speaking role. Luckily, he doesn't have to parlez very much francais. Dialogue is minimal here. What Elias Canetti called "the play of the eyes" does most of the communicating. Trouble is, chess -- even if you love it, which I do -- is not the most cinematic of subjects, especially when the games are played more on the faces than on the board. Ms. Bottaro borrows a trick or two from Pudovkin's great silent short "Chess Fever" (1925), a spoof in which a young man is so obsessed with the game that even his socks and handkerchiefs are checkered, and he totally ignores his fiancee. But "Queen to Play" is more sober and somber than humorous -- as contemplative as a tournament game, with occasional little bursts of activity or emotion. Its didactic lessons? I can think of three: The pursuit is always more interesting than the capture. Everything depends on whose move it is, and one bad one can wipe out 40 good ones. And you should check your mate more often.
Opens Friday at the Regent Square Theater.
Post-Gazette film critic emeritus Barry Paris
K: Yahoo! Alert Chess
29 Haziran 2011 Çarşamba
110. Bilgisayar Satrancı Va. Rybka
ChessVibes, David Levy'nin 28 haziran günlü yazısını alıntılıyor.
K: Yahoo! Alert Chess
Rybka disqualified and banned from World Computer Chess Championships
29 June 2011, 1.42 CET | Last modified: 11:21 | By Peter Doggers | Filed under: Reports | Tags: Computer chess
The International Computer Games Association (ICGA) has disqualified and banned Rybka and its programmer Vasik Rajlich from previous and future World Computer Chess Championships. The ICGA accuses Rajlich of plagiarizing two other programs, Crafty and Fruit, and demands that he returns the trophies and prize money of the World Computer Chess Championships in 2007, 2008, 2009 and 2010.
For quite a while there has been some serious turmoil in the computer chess world. When we reported about the Houdini-Rybka match in February of this year, the article triggered lots of comments about the issue of cloning. Was Houdini derived from the Ippolit series? Was it plagiarized from Rybka? And what about Rybka, was it largely based on the code of other engines?
Nine days later we published an article by IM David Levy, President of the International Computer Games Association (ICGA), who shared his thoughts about how to tackle the issue. A few days later he announced the establishment of the ICGA Clone and Derivative Investigation Panel.
Not long after, on March 1st, we received an open letter about the Rybka-Fruit case signed by fourteen chess programmers. They all supported the claim that Rybka was cloned from Fabien Letouzey’s Fruit.
In the last few months all the allegations have been seriously studied by the International Computer Games Association (ICGA). On Tuesday night we received the following text from the ICGA President himself.
Rybka Disqualified and Banned from World Computer Chess ChampionshipsThe International Computer Games Association (ICGA) has been conducting an investigation into allegations that, in the chess program Rybka, the programmer Vasik Rajlich plagiarized two other programs: Crafty and Fruit. The ICGA has considered and evaluated the evidence presented to the investigation panel and the report prepared by the panel’s Secretariat. (The report and evidence files are attached.) We would like to thank those members of the panel who contributed to this investigation and the Secretariat for the enormous amount of conscientious work they have put in to this matter.By a unanimous 5-0 decision of executive members of the ICGA we find ourselves in agreement with the verdict of the Secretariat’s report. We are convinced that the evidence against Vasik Rajlich is both overwhelming in its volume and beyond reasonable question in its nature. Vasik Rajlich is guilty of plagiarizing the programs Crafty and Fruit, and has violated the ICGA’s tournament rules with respect to the World Computer Chess Championships in the years 2006, 2007, 2008, 2009 and 2010. Specifically, Vasik Rajlich, on all five occasions, violated Tournament Rule 2 which requires that:Each program must be the original work of the entering developers. Programming teams whose code is derived from or including game-playing code written by others must name all other authors, or the source of such code, in their submission details. Programs which are discovered to be close derivatives of others (e.g., by playing nearly all moves the same), may be declared invalid by the Tournament Director after seeking expert advice. For this purpose a listing of all game-related code running on the system must be available on demand to the Tournament Director.By claiming other programmers’ work as his own, and failing to comply with the abovementioned rule, Vasik Rajlich has unfairly been awarded one shared 2nd-3rd place (in 2006) and four World Computer Chess Championship titles (in 2007, 2008, 2009 and 2010). Furthermore, it seems to the ICGA that Vasik Rajlich clearly knew that he was in the wrong in doing so, since he has repeatedly denied plagiarizing the work of other programmers.The ICGA regards Vasik Rajlich’s violation of the abovementioned rule as the most serious offence that a chess programmer and ICGA member can commit with respect to his peers and to the ICGA. During the course of the investigation and upon presentation of the Secretariat’s report Vasik Rajlich did not offer, despite repeated invitations from the ICGA to do so, any kind of defence to the allegations, or to the evidence, or to the Secretariat’s report, other than to claim in an e-mail to myself on May 13th 2011 that:Rybka has does not “include game-playing code written by others”, aside from standard exceptions which wouldn’t count as ‘game-playing’.The vague phrase “derived from game-playing code written by others” also does not in my view apply to Rybka.The ICGA is of the view that such a serious offence deserves to be met with correspondingly serious sanctions against the perpetrator. In deciding on appropriate sanctions the ICGA has borne in mind the approach of the International Olympic Committee for dealing with the most serious cases of the violations of its rules.The ICGA has therefore decided as follows:
Mr Levy also sent us a big number of documents which according to the ICGA form the evidence to the claim that Rybka was plagiarized from Crafty and Fruit. These documents can be downloaded below for anyone who wishes to dive further into the material.
The news is obviously a huge blow for the Rybka team. The impact in the computer chess world must be comparable to arguably the most famous example of doping in athletics: the positive drug testing of Canadian sprinter Ben Johnson in 1988. We’ve asked Vasik Rajlich for a comment and hope to add this later.
Downloads
Crafty-Rybka evidence (RTF)
Rybka vs Fruit: evaluation (PDF)
Rybka Investigation and Summary of Findings for the ICGA
Evaluation functions in Rybka 1.0 Beta and Rybka 2.3.2a
A comparison of Rybka 1.0 Beta and Fruit 2.1
Rybka 2.3.2a evaluation (TXT)
Quantifying evaluation features
Rybka investigation report
K: Yahoo! Alert Chess
109. Bilgisayar Satrancı V. Rybka
Son beş yılın dünya şampiyonu olan bilgisayar yazılımı Rybka ve yazarı Rajlich'e korkunç cezalar kesildi. Rybka'nın dünya birincilikleri iptal edildi; Rajlich'e ömür boyu turnuvalardan men cezası verildi. Nedeni ise malum: Rybka'da Crafty ve Fruit programlarının kodlarının kullanılması.
Rybka, the world’s best chess engine, outlawed and disqualified
By Sebastian Anthony on June 29, 2011 at 1:03 pm ExtremeTech
Rybka, the best chess-playing computer program in the world and the winner of the last four World Computer Chess Championships (WCCC), has been disqualified and banned for the plagiarizing of two other chess engines, Crafty and Fruit.
In a damning missive, the president of the International Computer Games Association (ICGA), the governing body behind the WCCC, describes how the author of Rybka, Vasik Rajlich, “unfairly” cheated his way to four victories by ripping off the work of other chess masters. The ICGA is demanding the return of both the trophies and the prize money, and has revised the standings of the last five championships to reflect Rybka’s excommunication. Not since IBM’s Deep Blue cheated to beat Garry Kasparov in 1997 has the world of computer chess been so uproarious!
The ICGA’s entire case seems to hinge on Rybka’s similarities to Fruit, an open source chess engine that was the runner-up at WCCC 2005. Rybka debuted the year after, and from the get-go experts were claiming that Rybka evaluated moves in an identical fashion to Fruit. Curiously, ICGA isn’t even disqualifying Rybka because it copies Fruit — rather, it’s simply upset that Rajlich claims his engine is original, and refuses to give credit where it’s due.
To come to this rather epic and libelous conclusion, the ICGA assembled a 34-person panel of programmers who have competed in past championships to analyze Rybka. Unfortunately, Rybka’s source code has never been available, so reverse engineering and straight-up move-evaluation comparison was used to analyze the originality of Rajlich’s chess engine. The panel unanimously agreed that newer versions of Rybka are based on Fruit — and worse, that the early beta versions were based on Crafty, another open-source chess engine. Rajlich has always claimed that Rybka is original — even when confronted with the findings of the report by the president of the ICGA.
Vasik Rajlich, incidentally, is an international master himself, and a graduate of MIT. Spectrum has a fantastic analysis of his background as both a brilliant chess player and an engineer — and it leaves you wondering if Rybka’s disqualification is actually kosher, or merely the result of a witch hunt. After all, with Rajlich not making his source code available, it’s almost impossible for the ICGA to be sure that he ripped off Crafty and Fruit — but at the same time, it’s easy to see the allure of the open-source, world championship runner-up Fruit.
If Rajlich did plagiarize Crafty and Fruit, the reasons are probably financial: Rybka is a commercial piece of software, and its accolade as the best chess program in the world must surely bring in a few dollars. It’s a tricky situation, though: with Rybka now outlawed from the WCCC, and with the ICGA asking other tournaments to block its entry, the only real way Rajlich and the rest of the Rybka team can clear their names is to show their source code — a financially untenable move. In short, Rybka is stuck between a rock and a hard place.
Read more at ChessVibes or download Rybka
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