diff --git a/index.toml b/index.toml
index ea81742..075f935 100644
--- a/index.toml
+++ b/index.toml
@@ -19535,6 +19535,11 @@ file = "mods/trinkets.pw.toml"
 hash = "d9bfec2cf36b6bae2d85a1136560e047ab8ce1b0e9798e7b6be5d0670f65fb55"
 metafile = true
 
+[[files]]
+file = "mods/ultimate-chess.pw.toml"
+hash = "1c2ae441087da22965c42edae4b9e0fc4b52229fa7c3772e46f621a191e34908"
+metafile = true
+
 [[files]]
 file = "mods/vein-mining.pw.toml"
 hash = "26abe43f2212a3fd943798d445db6bf9f8ecba76c4e8f7fe45ed703ff8d77645"
diff --git a/mods/ultimate-chess.pw.toml b/mods/ultimate-chess.pw.toml
new file mode 100644
index 0000000..d0cfdd6
--- /dev/null
+++ b/mods/ultimate-chess.pw.toml
@@ -0,0 +1,13 @@
+name = "Ultimate Chess"
+filename = "chessmod-fabric-1.1.3-1.20.jar"
+side = "both"
+
+[download]
+url = "https://cdn.modrinth.com/data/CXKUu3x4/versions/Vgs0Ogkf/chessmod-fabric-1.1.3-1.20.jar"
+hash-format = "sha512"
+hash = "288273e02f1f7e0b1dd0c577bae5da4e4156490a962cd03cd4e0832d46f0ee96ecd50b8c041fb94a24496a87b7f62804fce015e6b9adf4074dc8fc9cc6c48529"
+
+[update]
+[update.modrinth]
+mod-id = "CXKUu3x4"
+version = "Vgs0Ogkf"
diff --git a/pack.toml b/pack.toml
index 42e1848..e36947f 100644
--- a/pack.toml
+++ b/pack.toml
@@ -5,7 +5,7 @@ pack-format = "packwiz:1.1.0"
 [index]
 file = "index.toml"
 hash-format = "sha256"
-hash = "e85542205e79ad56ee0469a90510265459f33a8bffc90692f9bb871855f9e0cb"
+hash = "3c842f8c4706cac3dda491d8bcf3291634aa664490ca6f60e57ebe0a79df33bf"
 
 [versions]
 fabric = "0.16.9"