Search found 3963 matches
- Sun Aug 21, 2016 3:47 am
- Forum: Computer Chess Club: General Topics
- Topic: Just a moment of your time, please.
- Replies: 22
- Views: 8978
My appreciation
Let me thank all of you for your kind thoughts.
- Tue Aug 16, 2016 11:42 pm
- Forum: Computer Chess Club: General Topics
- Topic: Just a moment of your time, please.
- Replies: 22
- Views: 8978
Just a moment of your time, please.
Just a moment of your time, please. It was back in 1967 when I was a ten year old and my father James introduced me to chess. We were on vacation in Yellowstone National Park and he had given me a dollar to spend at a souvenir store where I bought a small peg chess set made from green and white plas...
- Tue Aug 16, 2016 11:17 pm
- Forum: Computer Chess Club: Programming and Technical Discussions
- Topic: yet another attempt on Perft(14)
- Replies: 33
- Views: 15335
The lesser evil
As had been mentioned long ago, it is relatively utproductive to increase the signature bit length well past the point where the probability of a false match is far less than the probability of error caused by cosmic ray events. And a cosmic ray event is what has almost certainly happened in one of ...
- Sun Aug 14, 2016 8:11 am
- Forum: Computer Chess Club: Programming and Technical Discussions
- Topic: yet another attempt on Perft(14)
- Replies: 33
- Views: 15335
Re: yet another attempt on Perft(14)
Ankan: Would it be possible to use your revised 128 bit signature program to check Symbolic's output for the first 400 work units (000-399)? The results I have for these are at https://dl.dropboxusercontent.com/u/31633927/Perft14Var/PerftSums Ok, will do. Thank you. More file links: On Google Drive...
- Sun Aug 14, 2016 6:40 am
- Forum: Computer Chess Club: Programming and Technical Discussions
- Topic: yet another attempt on Perft(14)
- Replies: 33
- Views: 15335
Cosmic rays
Well, be careful with making any changes which might somehow introduce a bug. Whenever I made changes in Symbolic , I then ran many regression tests to build confidence that I hadn't messed up. Independent verification is the only way to detect cosmic ray events. If the verification is done using th...
- Sun Aug 14, 2016 5:19 am
- Forum: Computer Chess Club: Programming and Technical Discussions
- Topic: yet another attempt on Perft(14)
- Replies: 33
- Views: 15335
The bottom bits
Again: Peter: 110101101011010011110000110011000101100111100000100110000110010101 Ankan: 110101101011010011110000110011000101100111100000100011100110010101 1. Note that the bottom eleven bits are the same. This strongly suggests that the difference of the totals is NOT due to false positive matches (...
- Sun Aug 14, 2016 4:15 am
- Forum: Computer Chess Club: Programming and Technical Discussions
- Topic: Perft(14) Weekly Status Reports for 2016
- Replies: 75
- Views: 29392
Perft(14) Weekly Status 2016-08-14
Perft(14) Weekly Status 2016-08-14 Symbolic has produced more than 54,000,000 perft(7) results so far, about 56.02% of the 96,400,068 needed. Day count: 739 Estimated remaining day count: 580 Estimated total day count: 1,319 Average throughput: 73,072 results/day Effective frequency: 227.72 GHz Work...
- Sun Aug 14, 2016 4:14 am
- Forum: Computer Chess Club: Programming and Technical Discussions
- Topic: yet another attempt on Perft(14)
- Replies: 33
- Views: 15335
Re: yet another attempt on Perft(14)
Ankan:
Would it be possible to use your revised 128 bit signature program to check Symbolic's output for the first 400 work units (000-399)?
The results I have for these are at https://dl.dropboxusercontent.com/u/316 ... /PerftSums
Would it be possible to use your revised 128 bit signature program to check Symbolic's output for the first 400 work units (000-399)?
The results I have for these are at https://dl.dropboxusercontent.com/u/316 ... /PerftSums
- Sun Aug 14, 2016 3:52 am
- Forum: Computer Chess Club: Programming and Technical Discussions
- Topic: yet another attempt on Perft(14)
- Replies: 33
- Views: 15335
Re: Peter Österlund's Perft(14) result
From Peter Österlund 2013.04.02: perft(14) = 61,885,021,521,585,529,237 Which is 10,240 more than Ankan's result. Which is THREE bits different (XOR) out of 66 bits. Which could be a triplet of single bit random flips (cosmic rays). Which shows that independent verification is so important. Peter: ...
- Sun Aug 14, 2016 3:43 am
- Forum: Computer Chess Club: Programming and Technical Discussions
- Topic: yet another attempt on Perft(14)
- Replies: 33
- Views: 15335
Peter Österlund's Perft(14) result
From Peter Österlund 2013.04.02: perft(14) = 61,885,021,521,585,529,237