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@Orbital-Web Orbital-Web released this 21 Aug 00:45
· 29 commits to main since this release
v1.6.0
15cdfa1

I was originally planning to implement SEE in v1.6 but I will postpone that to v1.7 considering how many bugs I found and how much has changed.

Changelog

  • Fixed MAJOR tt indexing bug (it was essentially only using 2 slots...) <- Major Headache cause here
  • Added draw detection before tt indexing to prevent 3FR draws in negamax
  • bestmove is initialized to the first move (usually hash move) to prevent empty moves in tt
  • itermove is set to bestmove at root ply to prevent returning no moves due to some wacky interactions with pondering at low time
  • Added red overlay (underlay?) when the king is in check
  • Added time increment option

v1.6

  • Now counts number of nodes visited
  • UCI prints PV and moves until mate
  • Implemented mate depth pruning
  • Pondering uses PV to predict opponent's move instead of wasting time recalculating it. This also increases the accuracy of the opponent's move guess as the PV generally has results from a higher depth.
  • It now checks for timeover every 2048 nodes instead of creating a new thread for time keeping (performance increase too?)
  • It now spends more time thinking overall and uses the most time in the early-middle games
  • Increased passed pawn bonus, especially when it's closer to promotion
  • Move ordering with tt move (as opposed to using itermove)

Performance
v1.6 🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩⬜🟥 v1.0 [355 / 27 / 18]
v1.6 🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩⬜⬜⬜⬜🟥🟥🟥🟥 v1.5 [251 / 77 / 72]

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