Monthly Archives: May 2017

Another round of sparring partners for Prophet3

Back in early March I added aspiration windows to Prophet with a window of 1/3 pawn, as well as some futility pruning and delta pruning. My schedule hasn’t allowed me to do a lot of work on the code since then, so I took advantage of the time to find some new sparring partners. The results are in the table below.

These games — almost 200k of them — are played at 3+0.5. That is, the clock starts at 3 seconds and 1/2 second is added after each move. That may seem like a fast game but when you’re going for quantity, it’s actually slower than I’d like. That’s about as fast as I could go on my older test system without getting a lot of time forfeits.

Rank Name Elo games score oppo. draws
1 plisk 98 25092 62% 17 18%
2 tjchess 98 32400 62% 11 21%
3 jazz 74 33286 60% 4 19%
4 myrddin 49 31082 58% -7 18%
5 Horizon 2 31080 51% -3 17%
6 tcb -5 31080 50% -2 18%
7 prophet3-20170319 -11 42068 45% 27 23%
8 jumbo -12 31240 49% -2 19%
9 madeleine -12 31240 49% -2 19%
10 Beowulf -94 24900 39% -17 19%
11 prophet2 -104 21700 39% -30 18%
12 matheus -107 21700 39% -29 18%

I’ve actually dropped Beowulf, Prophet2, and Matheus off the active list. The others should keep Prophet busy for a while.

With summer coming and other commitments starting to wind down for a while, I’ve started working again. The latest version seems to be about +10 ELO above this version.