v3.0

New features

• New low-cost solver which generates solutions with low (but not quite minimal) cost.
• New --optimize option to generate multiple solutions for each puzzle and pick the best ones.
• New --analyze option to generate a summary of each puzzle, including reagents, products and required reactions.
• Readme now includes a detailed design overview.

Improvements

• Many small optimizations to the old ("standard") solver.
• Now uses lp_solve to generate a more sensible recipe for each solution, avoiding waste where possible.
• Now verifies multiple solutions in parallel to save time (controlled via --maxparallelverifiers).
• Optional wrapper script (run.ps1) to both generate and verify solutions in parallel.

Internal changes

• Now targets .NET 8.0
• Extensive refactoring and other changes

v2.2

New features

• Improved the console output to better handle many puzzles. It now displays progress dots instead of full puzzle names, but still displays errors for unsuccessful solutions.
• Added a --report option for saving a summary of the generated solutions and their metrics.
• Improved solution verification to also detect overlapping parts.
• Added tests, using puzzles from omsim and the recent 24-hour challenge sample/test puzzles.

Improvements to generated solutions

• Added a new assembler for generating linear products.
• Added a new assembler for generating products which fit within a hexagon of diameter 3.
• Pistons are now automatically replaced with arms where possible.
• Many other small optimizations.

Bug fixes

• Extra copies of repeating molecules were sometimes being generated.
• Repeat instructions were generated at the wrong location when a sequence started with a Wait instruction.
• If a puzzle had multiple identical products, they were sometimes dropped onto the wrong output.

v2.1

• Generated solutions are now automatically verified using libverify from omsim. If verification is successful, the cost/cycles/area/instructions metrics are automatically written to the solution file.
• Removed the hard-coded 18 repetitions for puzzles that contain both repeating and non-repeating products. OpusSolver now uses the "output scale" of a puzzle to work out how many products to create in this situation, which may lead to simpler solutions for some puzzles.

v2.0

As of this version, OpusSolver is now a command-line program that generates .solution files from .puzzle files.