Some items of note:
**The overall improvement is such that Rybka 5, according to our testing, is now 85 points stronger than Houdini 2.
**The search has been improved, and Rybka is now most likely the fastest-searching engine among the top engines.
**The calculation of nodes per second (NPS) has been changed to the conventional counting method used by most other chess engines.
**The calculation of the depth has also been changed to the conventional scheme used by most other chess engines.
**The bugs involved in the occasional incorrect calculation of the score in the past have been solved: this feature has now been removed from the program. Most users will not find this a problem, though, as they are generally interested in the strongest move that the engine can play, not its score
**Rybka is now able to play Gothic Chess. This chess variant will be the primary focus of development for future Rybka versions.

Not April fools though, right? Gothic chess???
A few other notes:
**Rybka 5 now only uses 5-man endgame tablebases. In our testing, particularly in rook endgames, Rybka 5 performed noticeably better when using only the 345 Nalimov tablebases.
**The blind bishop endgame bugs are still in the program. I am working closely with Robert Hyatt to solve this problem, and we hope to release an update later this spring. We are hopeful that with some ingenuity, we might be able to make Rybka 5 even stronger than Crafty in these endgames.
**In terms of Gothic Chess, while Gothic Chess is supported, most GUIs (including Aquarium and the Fritz GUIs) don't support this chess variant, so you will need to download a GUI that supports this.
**Rybka 5 is greatly improved in the openings phase of the game. It is able to vary its opening moves in the engine analysis itself, based on the results of past games and the tuning of the parameters based on how the rest of the games went. As such, Rybka 5 no longer needs an opening book, and thus no longer supports one.
> **The blind bishop endgame bugs are still in the program. I am working closely with Robert Hyatt to solve this problem, and we hope to release an update later this spring. We are hopeful that with some ingenuity, we might be able to make Rybka 5 even stronger than Crafty in these endgames.


> It is able to vary its opening moves in the engine analysis itself, based on the results of past games and the tuning of the parameters based on how the rest of the games went. As such, Rybka 5 no longer needs an opening book, and thus no longer supports one.
Does this mean that Rybka 5 won't have an OFficial opening book.. or does Not Support mean = that rybka 5 Will not allow you to load your own .CTG books period? If so the case, I understand alot of people here use rybka 5 for other purposes than I, I mostly use for Engine Games vs. Engine Matches ..If the other Opponent uses Rybka 5 as well, Wouldn't both Users play same lines more often rather than traditionally as we all use custom opening books. I understand Rybka 5 will vary its openings as described, but if you have 30 players using same Engine in a Play room wouldnt same lines be played over and over almost identical games where basically would come down to who has strongest PC..?
Just asking a question, Would love to buy this Product nomatter the answer, But I feel it should atleast allow user option of adding or using his/her own opening book if need be.
Still, stickied for a day, to caught the unsuspecting people
> Rybka is now able to play Gothic Chess. This chess variant will be the primary focus of development for future Rybka versions.
Hmmm, it is
> **The overall improvement is such that Rybka 5, according to our testing, is now 85 points stronger than Houdini 2.
How disappointing. Back to the drawing table

Hey turbojuicevraj 
(we learned this from Microsoft)
Or, will I need another core upgrade?
LOL
Great job turbo.
> The bugs involved in the occasional incorrect calculation of the score in the past have been solved: this feature ...
Ahahhahha ...
Happy April Fools Day!
for 1st April But BAD joke for Rybka Lovers
Jatt
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