The Week in Chess

Wednesday, March 13, 2013

Rotor 0.8 - New Chess Engine Download

Release notes:

Rotor a command-line chess engine which implements the UCI protocol so it can be used with a separate chess graphical user interface program.  It is written in C++.


Rotor implements the following:
  • PVS search
  • 12x16 Mail-box move generator
  • Attack information of all squares is incrementally updated in every node
  • Quiescence search with check moves in the first ply, capture moves and check evasion moves in all quiescence plies
  • Killer and history move ordering
  • Transposition hash table
  • Null-move pruning
  • Late move reduction
  • Futility pruning
  • Check extension
Version 0.8 History:

- Modified transposition table
- Tuned mobility evaluation
- Changed null move reduction factor R to 3

Date released: 2013/03/12
Engine name: Rotor
Version: 0.8
Author: +Jan Brouwer
Protocol: UCI
Windows: W32
Linux: No
Android: Yes
MacOS: Yes
Multi-processor: No
SSE 4.2: No
Popcnt: No
FRC Chess960: No
Source code: No
Opening book: No
Est. ELO rating: 2448

Rotor 0.8 vs. Rotor 0.7a - Test Match, 20 Rounds 10S+1S

There is no significant improvement of Rotor 0.8 from the older version as it lost to Rotor 0.7a in a 20 rounds tests match with 3 points deficiency.
1Rotor 0.7a11.5/20· ·· ··6-3-11 97.75 
2Rotor 0.8 8.5/203-6-11· ·· ·· 97.75 

20 games played / Tournament finished

Tournament start: 2013.02.18, 01:27:27
Latest update: 2013.03.13, 15:30:57
Site/ Country: CYBIRD-0A89D1A1, United States
Level: Blitz 0:10/1
Hardware: AMD Phenom(tm) II X4 945 Processor 3000 MHz with 0.8 GB Memory
Operating system: Microsoft Windows XP 64 Bit Professional Service Pack 2 (Build 3790)
Table created with: Arena 3.0

Download computer chess engines tournament games here.

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