More Details About Fritz 12

[AdminX]

http://www.chesscentral.com/Fritz_12_p/fritz-12.htm

More about Fritz 12
Rated games with a more precise, real-world rating system.
Dial display for how sharp a position is (hotness) plus a special Mate-O-Meter.
Improved spy function shows clear refutations and only direct threats.
Analysis + openings classification revised and improved.
Calculation training improved.
Improved engine management: 4 GB memory for 64-Bit UCI engines, CPU display and simple settings for multi engines.
Evaluation profile optionally as non-linear display (as at the Chess Classic in Mainz).
New Fritz engine: even stronger!
New openings book by Alex Kure
Twelve hours chess tutorial videos with international trainers and world class players
Updated database of 1.5 million games from 1625 to 2009

http://www.wholesalechess.com/chess/fritz_12

[Dr.Wael Deeb]

http://www.chesscentral.com/Fritz_12_p/fritz-12.htm

More about Fritz 12
Rated games with a more precise, real-world rating system.
Dial display for how sharp a position is (hotness) plus a special Mate-O-Meter.
Improved spy function shows clear refutations and only direct threats.
Analysis + openings classification revised and improved.
Calculation training improved.
Improved engine management: 4 GB memory for 64-Bit UCI engines, CPU display and simple settings for multi engines.
Evaluation profile optionally as non-linear display (as at the Chess Classic in Mainz).
New Fritz engine: even stronger!
New openings book by Alex Kure
Twelve hours chess tutorial videos with international trainers and world class players
Updated database of 1.5 million games from 1625 to 2009

http://www.wholesalechess.com/chess/fritz_12

It sounds like it happened by accident

[Spock]

I wonder what advantage you get with huge hash sizes like 4GB with 64-bit engines. In Shredder GUI, once just for fun, I set Zappa to use 6GB (on an 8GB machine) and it was quite happy. I guess they have just responded to customer requests (unusual for chessbase perhaps) but I seriously doubt that anything bigger than 1GB of hash is useful

[Dr.Wael Deeb]

I wonder what advantage you get with huge hash sizes like 4GB with 64-bit engines. In Shredder GUI, once just for fun, I set Zappa to use 6GB (on an 8GB machine) and it was quite happy. I guess they have just responded to customer requests (unusual for chessbase perhaps) but I seriously doubt that anything bigger than 1GB of hash is useful

Totaly agreed here....
Dr.D

[yanquis1972]

hahaha it does

[PauloSoare]

Good when you are in infinite analyses?

[Dann Corbit]

I wonder what advantage you get with huge hash sizes like 4GB with 64-bit engines. In Shredder GUI, once just for fun, I set Zappa to use 6GB (on an 8GB machine) and it was quite happy. I guess they have just responded to customer requests (unusual for chessbase perhaps) but I seriously doubt that anything bigger than 1GB of hash is useful

I guess that with correspondence analysis and a really fast multiple CPU engine, it's practically essential to have a huge hash.

If (for instance) you were going to analyze a position for 8 CPU days I suspect that (for example) 100 GB hash would be highly beneficial.

Consider a mere 1.5 M NPS per CPU * 8 cores for 8 days...

1.5 M NPS * 8 cores * 86400 sec/day * 8 days = 8,294,400,000,000 nodes
If (for example) a hash table entry contains 64 bytes, then 100 GB hash would hold 1,562,500,000 entries.
Hence, each hash table entry would have been rewritten about 5000 times.
(acutally, a lot less than that, since only a majority are leaf positions).

But anyway, if you are doing long time calculations, then huge hash is better. If you had a super-fast machine with tons of CPUs and you wanted to analyze for a full week, then I suspect that the most memory you can put on your motherboard would be best.

[ernest]

If (for example) a hash table entry contains 64 bytes

I am quite surprised by these numbers, Dann!
For me, by far not all nodes give a hash entry, and 1 hash entry = 16 bytes usually (10 bytes for ChessTiger...)