v0.20.0

Changes

vs v0.20.0-rc2

• no lto builds by default (#625)

vs 0.19.1

• Squeeze-and-Excitation Networks are now supported! (lc0.org/se)
• Older text network files are no longer supported.
• Various performance fixes (most major being having fast approximate math
  functions).
• For systems with multiple GPUs, in addition to "multiplexing" backend
  we now also have "demux" backend and "roundrobin" backend.
• Compiler settings tweaks (use VS2017 for windows builds, always have LTO
  enabled, windows releases have PGO enabled).
• Benchmark mode has more options now (e.g. movetime) and saner defaults.
• Added an option to prevent engine to resign too early (used in training).
• Fixed a bug when number of visits could be too high in collision nodes.
  The fix is pretty hacky, there will be better fix later.
• 32-bit version compiles again.

v0.20.0-rc2

Only one change in this release:

• Fix for demux backend to match cuda expected threading model for computations. (#605)

v0.20.0-rc1

Changes

• Squeeze-and-Excitation Networks are now supported! (lc0.org/se)
• Older text network files are no longer supported.
• Various performance fixes (most major being having fast approximate math
  functions).
• For systems with multiple GPUs, in addition to "multiplexing" backend
  we now also have "demux" backend and "roundrobin" backend.
• Compiler settings tweaks (use VS2017 for windows builds, always have LTO
  enabled, windows releases have PGO enabled).
• Benchmark mode has more options now (e.g. movetime) and saner defaults.
• Added an option to prevent engine to resign too early (used in training).
• Fixed a bug when number of visits could be too high in collision nodes.
  The fix is pretty hacky, there will be better fix later.
• 32-bit version compiles again.

v0.19.1.1

Changes

Relative to v0.19.0

• Parameters from AlphaZero paper were introduced
• Do not load network on isready
• Fixed non-working nodes limit.

Relative to v0.19.1

• Correct version displayed (v0.19.1)

v0.19.1

Changes

Relative to v0.19.0

• Parameters from AlphaZero paper were introduced
• Do not load network on isready
• Fixed non-working nodes limit.

Relative to v0.19.1-rc2

(no changes)

v0.19.1-rc2

Changes

• Temperature and FPU related params. (#568)
• Rework Cpuct related params. (#567)

See also blog post.

v0.19.1-rc1

Changelog

• Updated cpuct formula from alphazero paper. (#563)
• remove UpdateFromUciOptions() from EnsureReady() (#558)
• revert IsSearchActive() and better fix for one of #500 crashes (#555)

v0.19.0

Change relative to RC5

• remove Wait() from EngineController::Stop() (#522)

Changes relative to v0.18

See v0.19.0-RC1 notes.

v0.19.0-rc5

Changes

• OpenCL: replace thread_local with a resource pool. (#516)
• optional wtime and btime (#515)
• Make convolve1 work with workgroup size of 128 (#514)
• adjust average depth calculation for multivisits (#510)

v0.19.0-rc4

Changelog

• Microseconds have 6 digits, not 3! (#505)
• use bestmove_is_sent_ for Search::IsSearchActive() (#502)