Perfect 15 (final)  is a opening book for ChessBase GUI
                                                                  The Perfect 15 book details:
- High-Quality ComputerChess games only of 2008 year
- Books's depth is up to 100 moves
- Manually haned tuned and carefully optimised the strongest lines
- Rybka 3 x64/Zappa Mexico X64 are used on critical opening positions(on hardware QX9650@3.8GHz)
- A lot of new strong lines never played nowhere before
- The Strongest book up to date (tested against availability top books)
- Improved about 50 Elo points stronger than Perfect 14 book
- The Perfect 15 book has been created within 2 month period
                                                                         It's recommended:
-To use the book options  "Optimize", Min games=2,Up to move=100

How to optimize the book under Fritz GUI (by pressing F4):
1.Edit
2.Openings Book
3.Book Options...
4.You must click the button ''Optimize'' , then set the minumum games  ''2'' and up to ''100'' moves

How to optimize the book on Playchess server:
1.Edit
2.Playing mode
3.Define Engine
4.Book Options
4.You must click the button "Optimize", Min games=2,Up to move=100
*Note: for more details see the pictures:
Playchess Server
ChessBase GUI
Download: Perfect 15 book
       My recommendations on improving the Perfect15 book to get high rating on Playchess server:
Perfect Books on Playchess server
1.Use Rybka 3 x64 with 128 MB Hastablesize for 3 min - 5 min time controls (512MB for 16 min game)
2.You need fast Hardware,at least quad-core processor,8 core...will be very good choice
3.Disable loosing weak lines with red colour
4.Daily update the book lines or at least in a week with new and stronger moves
5.If the lost game's line seems strong,(with this lost position you won matches before) then analyse the same lost position with Rybka 3 engine at slower time controls to find stronger move and add that new move to the book, but dont forget to enable the new move with green colour,if you are still not sure thats its good  line or not,then run a engine-engine match at 5/15/30 min... games starting at the same position between two Rybka 3 versions.
6.Go to Edit/Openings book menu and press "Reset weights",otherwise the Engine will never play the same line

How you can add new moves to the Chessbase books,there are 2 ways :
1.Manually:Right click with mouse on the book,then press ''Allow adding''
2.Automatically:Edit/Opening book/Import Games
Book Ranking  by Klaus Ritter
Copyright © 2008 Sedat Canbaz. All Rights Reserved.
                                                                        License Agreement:
"Perfect 15 book" is freeware. You may use and distribute it,
but without charge .Copyright © 2008

Author: Sedat Canbaz,Turkey
Web   :  www.sedatchess.com
Email : info@sedatchess.com 

Happy Testing,
Sedat Canbaz
   Program                          Elo    +   -   Games   Score   Av.Op.  Draws

01 Perfect 15                     : 3357   32  30   200    67.8 %   3229   55.5 %
02 Perfect 14                     : 3320   20  20   560    64.3 %   3218   49.6 %
03 Perfect 13x                    : 3290   20  20   490    61.1 %   3212   58.2 %
04 Rybka3                         : 3249   19  18   600    55.2 %   3212   55.7 %
05 Compmaster 2b                  : 3229   18  18   660    52.6 %   3211   51.5 %
06 Magister 2                     : 3223   22  22   500    50.3 %   3221   49.0 %
07 Salvo 4.1                      : 3222   26  26   310    49.8 %   3223   55.2 %
08 My Book 9.1                    : 3220   22  22   440    49.2 %   3225   53.4 %
09 Perfect 13                     : 3214   30  31   200    42.5 %   3267   60.0 %
10 Salvo 4                        : 3210   28  28   290    49.8 %   3211   52.8 %
11 My Book 8.1                    : 3206   31  31   220    53.9 %   3179   55.0 %
12 Ceko 2.0                       : 3203   20  20   490    52.1 %   3188   56.5 %
13 Ghost 14.2p                    : 3191   26  26   280    50.4 %   3189   60.0 %
14 Takker2008                     : 3189   21  21   490    50.1 %   3189   52.4 %
15 Zappa Perfect 15               : 3188   35  35   200    44.2 %   3229   47.5 %
16 Sicilian2                      : 3184   32  32   200    49.0 %   3191   57.0 %
17 Ghost 14.2t                    : 3182   26  26   330    47.7 %   3198   51.2 %
18 Salvo 3                        : 3179   27  27   300    49.7 %   3182   51.3 %
19 SicilianExtreme                : 3177   24  24   390    43.3 %   3224   51.8 %
20 Magister                       : 3175   26  26   320    48.8 %   3184   55.0 %
21 Playchess                      : 3172   21  21   490    47.4 %   3189   52.4 %
22 My Book 9                      : 3169   24  24   340    47.8 %   3185   58.5 %
23 Ghost 14.2k                    : 3169   29  29   220    49.1 %   3176   60.0 %
24 Awesome                        : 3151   21  21   470    45.2 %   3185   55.5 %
25 HS-for-Rybka                   : 3130   25  25   350    42.0 %   3187   53.1 %
26 RybkaII                        : 3127   31  31   220    42.5 %   3180   54.1 %
27 Zappa Perfect 14               : 3108   39  39   150    46.0 %   3136   50.7 %
28 Hiarcs12 Perfect 14            : 3080   41  41   150    43.3 %   3126   46.7 %
29 Zappa Perfect 13               : 3019   43  44   150    30.0 %   3166   41.3 %
30 Hiarcs12 H12MPBook             : 2990   47  48   150    27.7 %   3157   34.0 %

Note:Zappa Mexico X64 using Perfect 15 book:41 wins /95 draws /64 losses (only against Rybka 3 x64 engines)
For Perfect Books's Individual statistics:
http://www.sedatchess.com/perfect15_statistics.html
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Conditions:
Rybka 3 x64 4CPU is used (mainly) for all books
Hardware:QX9650@3.8GHz
Time Control: 4min + 2 sec
Hashtable Size:128 MB
Tablebases:3-4-5 MEN EGTB
TB Cache:16 MB
Tournament Director:Sedat Canbaz
Rybka 3 x64 using Perfect 15 Book: 80 wins / 111 draws / only 9 losses !  (only against Rybka 3 x64 engines)
Alternative download link