chore: rename package to eve

Author: raklaptudirm

Cargo.toml

@@ -16,7 +16,7 @@ tetka-games = { path = "./games" }
 
 [workspace]
 resolver = "2"
-members = [ "uxi", "games" , "arbiter"]
+members = [ "uxi", "games" , "eve"]
 
 [profile.release]
 debug = true

arbiter/src/lib.rs

@@ -4,9 +4,10 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
+statrs = "0.18.0"
 
 [profile.release]
 debug = true
 opt-level = 3
 codegen-units = 1
-lto = true
+lto = true

arbiter/Cargo.toml eve/Cargo.toml

@@ -0,0 +1,47 @@
+// Copyright © 2025 Rak Laptudirm <[email protected]>
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use super::{BayesianElo, Wdl};
+
+pub fn llr(ws: usize, ds: usize, ls: usize, elo0: f64, elo1: f64) -> f64 {
+    let w = ws as f64 + 0.5;
+    let d = ds as f64 + 0.5;
+    let l = ls as f64 + 0.5;
+
+    let n = w + d + l;
+
+    let elo: BayesianElo = Wdl(w / n, l / n).into();
+
+    let wdl0 = Wdl::from(BayesianElo(elo0, elo.dlo()));
+    let wdl1 = Wdl::from(BayesianElo(elo1, elo.dlo()));
+
+    w * (wdl1.w() / wdl0.w()).ln() + d * (wdl1.d() / wdl0.d()).ln() + l * (wdl1.l() / wdl0.l()).ln()
+}
+
+pub fn elo(ws: usize, ds: usize, ls: usize) -> (f64, f64, f64) {
+    let n = (ws + ds + ls) as f64 + 1.5;
+
+    let w = ws as f64 + 0.5;
+    let d = ds as f64 + 0.5;
+    let l = ls as f64 + 0.5;
+
+    let mu = w + d / 2.0;
+
+    let sigma = f64::sqrt(
+        w * f64::powi(1.0 - mu, 2) + d * f64::powi(0.5 - mu, 2) + l * f64::powi(0.0 - mu, 2),
+    ) / n.sqrt();
+
+    let mu_max = mu;
+
+    (0.0, 0.0, 0.0)
+}