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@@ -6,7 +6,6 @@ WORKDIR /app
 RUN apt-get update && apt-get install -y --no-install-recommends \
     gcc \
     curl \
-    p7zip-full \
     && rm -rf /var/lib/apt/lists/*
 
 # Install moonfish from PyPI (includes chess dependency)
@@ -38,13 +37,10 @@ RUN MOONFISH_PATH=$(python -c "import moonfish; import os; print(os.path.dirname
     cp -r /tmp/rl/* ${MOONFISH_PATH}/rl/ && \
     rm -rf /tmp/rl
 
-# Download cerebellum opening book (~74MB)
-# Source: https://zipproth.de/Brainfish/download/
+# Download cerebellum opening book from moonfish GitHub repo (~170MB)
 RUN mkdir -p /app/opening_book && \
-    curl -L -o /tmp/cerebellum.7z "https://zipproth.de/Brainfish/Cerebellum_Light_3Merge_200916.7z" && \
-    7z x /tmp/cerebellum.7z -o/tmp/cerebellum && \
-    find /tmp/cerebellum -name "*.bin" -exec cp {} /app/opening_book/cerebellum.bin \; && \
-    rm -rf /tmp/cerebellum.7z /tmp/cerebellum
+    curl -L -o /app/opening_book/cerebellum.bin \
+    "https://github.com/luccabb/moonfish/raw/master/opening_book/cerebellum.bin"
 
 # Expose port - HF Spaces expects 7860
 EXPOSE 7860