Noomen TCEC 29 books available

Below you can download all the openingbooks for TCEC season 29 made by Jeroen Noomen.

4K VI final book

TCEC 28 superfinal book

The TCEC 28 superfinal book was made by Jeroen Noomen in cooperation with Windfishballad and Kittenkaboodle. The selected 50 opening lines are from famous Grandmasters of the past and from Stefan Pohl's UHO - or Unbalanced Human Openings (for more information: https://www.sp-cc.de/uho_2024.htm). 

To select the lines I had help from Windfishballad, who used a special script that analysed hundreds of lines for me. We used Kittenkaboodle's superfast PC on 512 threads to have each possible superfinal candidate opening analysed for around 7-10 minutes by both Stockfish and Leela. With the information gathered I selected the lines with the best exits, preferably with as low as possible PV agreement. I also included a few lines where there was quite a big difference in exit evaluation.

The book contains lines from games of the great chessplayers of the past and today. Like Steinitz, Blackburne, Zukertort, Nimzowitsch, Bronstein, Petrosian, Timman, Miles, Ljubojevic, Anand, Judit Polgar, Carlsen and many others. Also games of lesser known grandmasters are in the mix.

Average length of the lines is 7.96 moves, which is somewhat lower than previous superfinal books. As usual the lines have a very high bias to avoid a huge number of uninteresting draws. Typically the book exits are around 1.00, which means they are on the edge of a win and a draw. The great majority of the lines have an exit evaluation  between 0.90 and 1.10. Please note that the real book exits under TCEC playing conditions may vary with my own exits due to newer Stockfish and Leela versions, shorter or longer thinking time and several other factors as well.

Black advantage: there are two lines that start with a black advantage, increasing the chance of a black win.

Higher/lower book exits: the lines were randomly put into the book, if there is a somewhat lower exit it will always be followed by higher exits.


ECO code distribution

ECO A: 10 lines

ECO B: 18 lines

ECO C: 7 lines

ECO D: 2 lines

ECO E: 13 lines

Move length distribution

5 moves: 2 lines

6 moves: 7 lines

7 moves: 4 lines

8 moves: 25 lines

9 moves: 7 lines

10 moves: 4 lines
> 10 moves: 1 line

Noomen TCEC 28 books available

Below you can download all the openingbooks for TCEC season 28 made by Jeroen Noomen. 

4K V final book

All 4K final books

Entrance League book

Premier Division book

Superfinal book

Update: new version of openingbook Rebel.bin

Hi all,

Here is an update of Rebel.bin, the polyglot openingbook I made for the Rebel engine. With lots of improvements, additions and new variations. To browse through the book you need a GUI that supports browsing polyglot books, f.e. SCID.

Download link:

Download Rebel.bin openingbook

Enjoy the new book!

Noomen TCEC 27 books available

Hi chess engine fans,

Below you can download the TCEC 27 Premier Division book and the TCEC 27 superfinal book made by Jeroen Noomen.

TCEC 27 Premier Division

Noomen S27 DivP book

TCEC 27 Superfinal

Noomen S27 sufibook

TCEC 27 superfinal book: 50 chess classics

The TCEC 27 superfinal book was made by Jeroen Noomen in cooperation with Windfishballad. It will be a continuation of the trend I started in season 25: the selected 50 opening lines are from famous Grandmasters of the past. In the list below you can see which famous grandmaster features in which line. The TCEC 27 superfinal will be a tribute to the great player Viktor Korchnoi: 23 of the lines were taken from Korchnoi's games. Also one of the few still living worldchampions, Boris Spassky, is present with 10 lines taken from his games.

Average length of the lines is 8.6 moves, which is in line with previous superfinal books. Including chess classics comes with a small price, i.e. lines are longer. As usual the great majority of the lines have a very high bias.

Black advantage: there are two lines that start with a black advantage, increasing the chance of a black win.

Personal favourites: my all time favourite lines of this superfinal are #9, #32 and #50.

Higher/lower book exits: the lines were randomly put into the book, but in general a lower exit will be followed by a higher exit.

ECO code distribution

ECO A: 11 lines

ECO B: 13 lines

ECO C: 10 lines

ECO D: 3 lines

ECO E: 13 lines

Move length distribution

4 moves: 3 lines

5 moves: 1 line

6 moves: 6 lines

7 moves: 8 lines

8 moves: 4 lines

9 moves: 8 lines

10 moves: 7 lines
11 moves: 10 lines

> 11 moves: 3 lines

Classic games in the S27 superfinal book:
1: Spassky-Fischer, Worldchampionship game 19, Reykjavik 1972
2: Giorgadze-Kasparov, Debrecen 1992
3: De Riviere-Morphy, Paris 1863
4: Korchnoi-Karpov, Hastings 1971/72
5: Taimanov-Spassky, Ch USSR 1957
6: Spassky-Franz, Riga 1959
7: Korchnoi-Judit Polgar, Prague 1995
8: Grünfeld-Alekhine, Margate 1923
9: Khodzhibekov-Korchnoi, Frunze 1956
10: Korchnoi-Ljubojevic, Palma de Mallorca 1972
11: Ree-Korchnoi, Leeuwarden 1977
12: Korchnoi-Udovcic, Leningrad 1957
13: Teichmann-Alekhine, Berlin 1921
14: Suetin-Korchnoi, Moscow 1960
15: Tartakower-Barcza, Venice 1948

16: Korchnoi-Ciocaltea, Skopje Olympiad 1972
17: Savon-Korchnoi, Moscow 1973
18: Spassky-Planinec, Moscow 1975
19: Korchnoi-Kotkov, Molotov 1956
20: Petrosian-Spassky, Worldchampionship game 12, Moscow 1966
21: Botvinnik-Flohr, Nottingham 1936
22: Kasparov-Andersson, Niksic 1983
23: Byrne-Spassky, Candidates Qf, San Juan 1974
24: Nedeljkovic-Korchnoi, Leningrad 1957
25: Korchnoi-Ciocaltea, Nice Olympiad 1974

26: Lasker-Pillsbury, London 1899
27: Blackburne-Anderssen, Baden Baden 1870
28: Botvinnik-Tal, WCh 1961 Moscow
29: Sokolov-Karpov, Bugojno 1986
30: Karpov-Ermenkov, La Valetta Olympiad 1980
31: Korchnoi-Mestrovic, Sarajevo 1969
32: Garcia Martinez-Korchnoi, Havana 1969
33: Geller-Spassky, Ch USSR 1955
34: Mecking-Korchnoi, Candidates Qf, Augusta 1974
35: Ljavdansky-Korchnoi, Tallinn 1965
36: Korchnoi-Bukic, Budva 1967
37: Spassky-Olafsson, Moscow 1959
38: Bogoljubow-Tartakower, Vienna 1922
39: Korchnoi-Kuzminykh, Leningrad 1953
40: Korchnoi-Pasman, Beersheva 1978
41: Korchnoi-Geller, Kiev 1954
42: Spassky-Hort, Candidates Qf, Reykjavik 1977
43: Karpov-Miles, Las Palmas 1977
44: Kasparov-Ivanchuk, Horgen 1995
45: Karpov-Korchnoi, WCh 1978 Baguio City
46: Korchnoi-Paoli, Gyula 1965
47: Kasparov-Short, Moscow Olympiad 1994
48: Matulovic-Spassky, Sochi 1966
49: Nimzowitsch-Alekhine, Dresden 1926
50: Korchnoi-Udovcic, Rovinj/Zagreb 1970

Noomen TCEC 26 books available

Hi chess engine fans,

Below you can download the TCEC 26 Premier Division book and the TCEC 26 superfinal book made by Jeroen Noomen.

TCEC 26 Premier Division

Noomen S26 DivP book


TCEC 26 Superfinal

Noomen S26 superfinal book