Author: John Coffey
Date: 13:38:53 09/18/98
When a computer (such as crafty) lists the number of nodes that it has looked at, does the number represent all the variations in the tree examines or does it represent only the leaf positions evaluated? On a 200mhz computer, Fritz5 claims to examine 200,000 positions per second, and Crafty only about 80,000 per second. Yesterday I was only getting about 50,000 positions per second out of Crafty on a 400 mhz PII, so I wonder how much Windows 95 drags down the search? Could this be a reason why some chess programs still use DOS? Even if we accept the Fritz numbers, we are still talking about a thousand clock cycles per "node." Offhand that seems like a lot. If someone were to write an engine that was strictly tactical (like a mate search), I wonder how many clock cycles it would need per node? It makes me wonder if chess algorithms could not be optimized somewhat? (I am not saying that they can be optimized, just that I am wondering about it.) Best wishes, John Coffey
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