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4. Since a King is allowed to castle with each of the rooks on its flanks, why shouldn't the King be allowed to castle with a King pawn promoted to a rook? (assuming it meets the usual requirements of not being in check, not passing through check, etc)

The list of killed engines was introduced about a month ago :) The total number of games killed is currently about 2,200 We try to ensure all engines on the list get at least 200 games. If a new engine version comes out quickly, and the old version only has a small number of games, then either we c...

Hi Graham, Is the list of "killed engines" something new? I didn't see it before, but that doesn't mean anything. Anyway, I think it is a good idea to prune games that cause statistical "noise", such as these. But isn't "kill" a bit harsh? http://www.computerchess.org.uk/ccrl/4040/kill_list.html But...

Vas said: I am 100% sure that nobody has gotten a hold of my source code - this stays on just one machine which is not connected to the internet. This has been the case since well before Rybka 1.0. No backup? Not even a CD put into a safe deposit vault box? Obviously he doesn't want to broadcast whe...

K I Hyams wrote:

Michael Sherwin wrote: one of his testers got access to his computer.

I had already decided that this was the most likely possibility. One of the testers of the early versions is known to have a mischievous streak............

The butler did it!

Hi Graham, I am not sure if I understand correctly the term that the engine "crashed". Please understand my somewhat naive questions. When the engine crashed, does it stop thinking, no outputs, and the OS pops-up an error window? Or it simply losses on time while thinking indefinitely on a position...

Imho, I think the chances of unassembling Rybka code is much, much less than the chances that one of Vas' computers got hacked.

I don't know why Vas is laughing about it. Perhaps that's just for public consumption. But if it is a clone (I'm neutral on this), then there would have had to have been a breach in security. Vas should be concerned about that possibility to avoid a replication. He probably is.

I think everyone should take ANY "ECO" statistics with skepticism. Nothing against CCRL and I admire their work, but "ECO" stats are inherently ambiguous. There are two major points of view: Take the literal moves as they occur and form the ECO value OR Wait to see how the game transforms and then t...

Hi Ed, Would you take a look at this game by ProDeo 1.5? It seems to me that PD, with less material, has an easy 50 move draw about to occur. But instead, on move 117, PD decides to avoid the 50 move draw and quickly loses. -Norm [Event "G-1"] [Site "?"] [Date "2007.06.11"] [Round "1.15"] [White "Pr...