These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 1.04 s (backtrack: 0/20).

[ebuild  N     ] dev-cpp/gtest-1.17.0:0/1.17.0::gentoo  USE="(-abseil) -doc -examples -test" 865 KiB
[ebuild  N     ] dev-cpp/abseil-cpp-20260107.1:0/2601.1.0-cpp20::gentoo  USE="-debug -test -test-helpers" 2251 KiB
[ebuild  N     ] games-board/lc0-0.33.0_rc0::gentoo  USE="-blas -dnnl -ispc (-onnx) -opencl -test" 1374 KiB

Total: 3 packages (3 new), Size of downloads: 4489 KiB