mate 0

Lucas Monge's Avatar

Lucas Monge

27 Jan, 2014 07:08 PM


I have a problem in my program as I don´t understand next output of stockfish DD:

line 3191 : info depth 13 seldepth 19 score mate 0 upperbound nodes 3991875 nps 399147 time 10001 multipv 15 pv c2c3 f6e4 c4d5 e4f6 d5c6 d7c6 f3e5 f8d6 d2d4 e8g8 d1b3 d6e5 d4e5 f6e4

I believe it could be a bug.
In attach all the output of an analysis of a position.


  1. Support Staff 1 Posted by Daylen Yang on 27 Jan, 2014 08:18 PM

    Daylen Yang's Avatar

    This is fixed in the Dev version.

    Sent from my iPhone

  2. Daylen Yang closed this discussion on 27 Jan, 2014 08:51 PM.

  3. Lucas Monge re-opened this discussion on 01 Feb, 2014 05:48 AM

  4. 2 Posted by Lucas Monge on 01 Feb, 2014 05:48 AM

    Lucas Monge's Avatar


    I have tested 010214 : master of and bug about mate 0 appears again. In attach ouput of one analysis showing the problem (line 4232).
    Also tested with stockfish_14012918_32bit.exe (last dev version in with the same result.


  5. 3 Posted by public on 04 Mar, 2014 09:23 AM

    public's Avatar


    I'm sorry but I have to agree with Lucas.
    Also the latest dev-version does not solve the problem...

    Thanks in advance,


  6. 4 Posted by Jens on 19 Jun, 2014 06:27 PM

    Jens's Avatar

    Version 5.0 Release also contains this issue. Is it safe to ignore all info messages with "upperbound" keyword? Or will I miss good analysis?

  7. 5 Posted by roelof on 21 Jun, 2018 08:52 PM

    roelof's Avatar

    i also encountered this "bug" at position 5rk1/1qp2pp1/p3pn1p/3rR3/1pN5/3P2QP/PPP2PP1/R5K1 b - - 2 24 but when i made the option Threads = 2 the error was gone !? Using StockFish 9 (64 bit)
    UPDATE : this is NOT true .. later i encountered the same behaviour with that setting .. so i could delete this answer, sorry ..

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