Saturday, January 25, 2020
A crude chess program in order to look 10 half moves ahead would take the hypothetical 25 moves possible and do roughly 25 to the 10nth power calculations, which would take a very long time. However, the alpha-beta algorithm eliminates mathematically unnecessary calculations making this more like 5 or 6 to the tenth power, which is a huge difference.
What surprises me is that program Stockfish reduces this to more like 2 to the N power, which is considerably less. Exactly how it does this I'm not sure, although I have some idea.
I would contend that looking deeper in chess will always involve an exponential increase, by definition. To not be exponential means that we could look infinitely far ahead and completely solve chess. This is kind of the point of the video.
Tuesday, January 21, 2020
Friday, January 17, 2020
Monday, January 13, 2020
Friday, January 10, 2020
Thursday, January 9, 2020
Sunday, January 5, 2020
Wednesday, January 1, 2020
Monday, December 30, 2019
Sunday, December 29, 2019
Thursday, December 26, 2019
Sunday, December 22, 2019
Friday, December 13, 2019
Tuesday, December 10, 2019
On this table it is a bit too high. I plan on buying the riser which costs $45, but it is frequently available cheaper, so I'll be looking for a sale after Christmas.
I use the Walmart app to check the prices on Arcade1up products. The prices change frequently and items tend to be heavily discounted when Walmart decides to close them out at a particular store.
Tuesday, December 3, 2019
Saturday, November 30, 2019
Friday, November 29, 2019
Tuesday, November 19, 2019
This is really good for a refurbished laptop that I paid $89 for.
Multicore Benchmark on my old iMac: ~5000
The latest $150 Amazon tablet also benchmarks at this. It is an amazing world we live in.
I still use this machine to analyze chess games and openings. Because the display tends to quit, I access the machine remotely.
Multicore Benchmark on my new iMac: ~8100
Ideally I would have built a new AMD machine and gotten up to 20000. However, I needed a Mac to do the work that I am now doing.
I am suspicious of the combo drive using an SSD as a buffer to the hard drive. If something went wrong there then it would definitely freeze the computer.
Monday, November 18, 2019
A few months ago I purchased a used 2017 iMac and installed Windows 10 on it. For the most part, this has been a great machine. However, there is now a problem. The computer will appear to run slow and then eventually freeze. This usually happens while using Google Chrome.
I am normally good at dealing with any kind of software problem that comes up, but this could be something going wrong with the hardware, like the RAM, the SSD, or some controller board. Hardware is mostly outside my area of expertise, although I did buy some new RAM chips that I have not yet installed. I could try taking out the old RAM chips and put in the new RAM chips and see if the problem persists.
On the software side maybe there is a virus, which seems unlikely because I have Norton which normally takes care of these things. It is possible there is a driver issue, but that also seems unlikely. I would not expect Google Chrome to be the problem, but I would not rule it out either. I could try a different web browser.
I need to reboot the computer into McIntosh mode and see if the problem happens again. If it does, then it is a hardware problem. However, if the problem goes away, then something is wrong in the Windows 10 world and I would consider erasing the Windows 10 partition and reinstalling the operating system, which is a time-consuming task.
Saturday, November 9, 2019
Tuesday, October 29, 2019
Tuesday, October 22, 2019