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.