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Are you defining a repetition as the position occurring twice? I've only been assigning draw scores to positions that hit 3 repetitions. Never thought about this.... I suppose I should be using draw scores for positions that occur twice... not thrice. I suppose I should never even being storing tran...

Hey, I recently implemented a very simple Aspiration Window wrapper around the root of the search. After running my test sets I found a ~30 ELO gain and committed the changes. I then discovered a bug with how I was storing Transposition Entries in the root search, now that the bounds are not always ...

I've just now got around to adding a basic Aspiration window wrapper around my rootSearch function. in pseudo code, it is something like this.. for (margin = 30; margin < 250; margin *= 2) alpha = lastScore - margin; // lastScore is from previous draft beta = lastScore + margin; I'm aware that I mig...

Your original post claimed to make nps gains. If that is not the case, was is your objective in using a different hashing method?

Up until now my testing procedure has been highly unorganized. My tests are, at best, a 100game test versus another engine in 40moves in 4 minutes time controls. This is problematic because 100games at this time control takes hours and hours (Was testing in Arena). I now have cutechess-cli set up an...

I HIGHLY doubt that you are out performing Zorbist. Meaning one of a couple things... 1) Your Zorbist implementation is poor 2) Your testing scheme is bad. Changing the hash signatures changes how your table affects your search. To measure the performance of your Hashing method you need to disable t...

By Divide do you mean; Show PERFT counts for EACH initial move? If that is the case, StockFish does this.

I've always really loved the name Crafty. I'm not sure if it is a great name or if I have just spent too many hours reading the source. Houdini will always be my favorite however. I also really like MicroMax. It's pretty simple but I love the play on words with miniMax and Micro because of it's size.

I highly doubt this would stop your from losing ELO, but the best idea I know of is asymmetrical evaluation. Gives your evaluations weights, such that you could care more about your pawn structure than your opponent. Or maybe you want to play more aggressive so you increase the value of your rooks b...

Ran it through my engine quickly... results... info depth 1 score cp 328 time 0 nodes 139 pv e2f2 info depth 2 score cp 328 time 0 nodes 518 pv e2g2 info depth 3 score cp 338 time 0 nodes 1022 pv e2g2 info depth 4 score cp 338 time 0 nodes 2958 pv e2g2 info depth 5 score cp 341 time 0 nodes 7461 pv ...