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v1.2

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@github-actions github-actions released this 20 Oct 13:48
· 24 commits to main since this release
v1.2
3468668

Changes

  • Analysis output. Psion's analysis display is now reported as UCI info lines, e.g. info depth 5 time 88 score cp -10 pv e2e4 d7d5 b1c3 g8f6 f2f3, so GUIs (also xboard through Polyglot) show the engine's thinking.
    • Scores are in centipawns (resolution 10) from the side to move's point of view; mates are reported as score mate N.
    • Psion does not show its search depth; the depth given is the length of the longest principal variation so far in the search.
    • Book moves and moves found instantly come without info.
  • Fix: hangs in locked pawn endings. In positions where only the kings can move, Psion could stop reading the keyboard, and the engine answered bestmove 0000 (an illegal move for the GUI). Psion now plays at level 11 (4 minutes per move) instead of Infinite, in easy mode (no pondering); every search is still ended by the adapter's time management.

Psion Chess itself is not included: see data/README.md in the package for where to download it.

Full Changelog: v1.1...v1.2

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