Little Wing 0.8.0

vincent · Post by **vincent** » Tue Mar 03, 2026 9:07 am

There should be around +300 ELO since the previous release of Little Wing from 2021. The majority of this comes from automated tuning of eval parameters (material, mobility, PST), plus good gains from the addition of the history heuristic, reverse futility pruning, and a new log log late move reduction formula, along with a few other things.

The engine is compatible with both XBoard and UCI protocols, and support of the latter has improved but it is still stronger when using the former if you want to test it. There's too many CPU and OS nowadays to build all the versions so you can use `make` to build the executable if you have Rust installed and find it in `target/release/littlewing` (next time I'll move it to the root of the project).

https://github.com/vinc/littlewing/releases/tag/v0.8.0

STC:

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Rank Name                 Elo    +    -   games score oppo. draws
   1 Fruit 2.1           2712    8    8    8716   80%  2449   12%
   2 Stash 21.0          2644    7    7    8730   73%  2449   13%
   3 Akimbo 0.3.0        2641    5    5   20461   72%  2466   19%
   4 Stash 20.0          2509    4    4   20467   55%  2466   14%
   6 Little Wing 0.8.0   2476    2    2  109849   54%  2440   14%
   7 Stash 19.0          2460    4    4   20466   49%  2466   14%
   9 Sungorus 1.4        2405   14   14    1983   48%  2415   16%
  10 FoxSEE 8.2          2404   14   14    1983   48%  2415   15%
  11 Stash 18.0          2401    4    4   20462   42%  2466   14%
  12 Robocide 0.1        2368   14   14    1983   44%  2415   15%
  13 Stash 17.0          2343    5    5   20426   35%  2466   12%
  14 Stash 16.0          2292    5    5   20426   29%  2466   12%
  15 MORA 1.1.0          2280    5    5   20457   27%  2466   15%
  16 Odonata 0.4.0       2274   15   15    1982   33%  2415   16%
  17 Spacedog 0.97.7     2272   15   15    1983   33%  2415   12%
  18 Little Wing 0.7.0   2173    7    7    9793   25%  2417   10%
  19 Cadabra 2.0.1       2122   18   18    1982   18%  2415   11%
  20 Achillees 1.0       2027   21   21    1982   12%  2415    7%

LTC:

Code: Select all

Rank Name                Elo    +    - games score oppo. draws
   1 Fruit 2.1          2679   15   15  2064   76%  2476   18%
   2 Stash 21.0         2679   15   15  2064   75%  2476   15%
   3 Akimbo 0.3.0       2622   14   14  2064   70%  2476   24%
   4 Stash 20.0         2509   13   13  2064   54%  2476   18%
   5 Little Wing 0.8.0  2476    4    4 33022   63%  2364   16%
   6 Stash 19.0         2452   13   13  2064   47%  2476   18%
   7 FoxSEE 8.2         2427   13   13  2064   43%  2476   20%
   8 Stash 18.0         2410   13   13  2064   41%  2476   19%
   9 Stash 17.0         2338   14   14  2064   32%  2476   15%
  10 Sungorus 1.4       2319   14   14  2064   30%  2476   16%
  11 Stash 16.0         2298   14   14  2064   27%  2476   15%
  12 Robocide 0.1       2269   15   15  2064   24%  2476   16%
  13 Odonata 0.4.0      2269   15   15  2063   24%  2476   15%
  14 MORA 1.1.0         2238   15   15  2064   20%  2476   16%
  15 Spacedog 0.97.7    2221   16   16  2064   19%  2476   14%
  16 Cadabra 2.0.1      2086   20   20  2064    9%  2476    8%
  17 Achillees 1.0      2008   24   24  2063    6%  2476    6%

(Achillees 1.0 is stronger on CCRL than in my server, my build is maybe not optimized or something)