Resolve 8 issues #89
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Resolve 8 issues #89
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…lue is not just truthy.
johndoknjas
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ucinewgame command by default…commits too). So add `a2a4`.
…rting_position`.
johndoknjas
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Open
…f the set position functions. Rather, make a new function that can do this if the user wants.
…able is only a couple GBs, this can take more than half a second.
…necessary calls to `self._is_ready()`.
johndoknjas
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…t` function (since it is only used there).
johndoknjas
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johndoknjas
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…by not running in debug mode.
…moves function was modified to set the fen position after each move (in order to check for the correctness of each move). The issue with this is it will not allow the engine to detect game-state stuff like threefolds, even if the user sends all the moves in the game at once.
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Closes #75, closes #77, closes #82, closes #83, closes #87, closes #88, closes #92, and closes #93.
In regards to issue #87, my
25473eb2commit in this PR implemented it. However, I then noticed that thetest_get_best_move_remaining_time_not_first_movefunction would fail with the version of SF used by the github ci. So in commit693cbd0I included "g1f3" as an acceptable move. After looking into it a bit, I found that in this instance SF gave "g1f3" due to no longer callingis_move_correctfrom the make moves function (which has SF do a depth 1 search for each move it's about to make). In a test PR I did to look into it, compare how a05ec3a fails but dbf0131 doesn't. Similarly, 6c6e391 fails but 695ae89 doesn't (for the linux tests).Since doing a depth 1 search before making each move certainly isn't required or expected in order to use Stockfish properly, adding "g1f3" to the test case is sound.
On the topic of issue #77:
As explained by the author of Fairy Stockfish here: "In fact, in Stockfish ucinewgame does exactly the same as setoption name Clear Hash".
For users, clearing the hash wouldn't be good to do when making moves, as it'll slow down a subsequent search. Also, clearing the table takes time itself. It only makes sense when starting a new game, but even then I suspect Stockfish's algorithm would clear it as it sees fit.
Removing the optional param of
set_fen_positiontechnically breaks backwards compatibility, since it's possible a user could call the function (without sending a second argument) and assume the hash table will implicitly be reset. However, this seems like a very rare case, and it's hard to see what the benefits would be. Since we're working on a new major release too, it feels justified in doing this. An alternative though is changing the name ofset_fen_positionso that no existing users can continue to call it, although I don't have a good candidate at the moment.