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Odd XG bug

Posted By: Terje Pedersen
Date: Tuesday, 28 April 2015, at 2:16 p.m.

The other day I ran into this odd bug from mochy-fanar-2011Sep010308_annotated.xg when I was looking at the biggest equity error Falafel had made (In matches/statistics and select Falafel in the name dropdown but the data is on my other server) and I was surprised to find that it came up with a -0.715 error. Really? :-) And looking closer at it I found that in XG it also says that it is a -0.715 take blunder but it also says that it is a double/take. What?

https://flic.kr/p/s55fQ9

I just added a test for this on my server and got:

ERROR! mochy-fanar-2011Sep010308_annotated.xg 4-6 (move 45): Incorrect errcube. Setting to 0.

ERROR! mochy-fanar-2011Sep010308_annotated.xg 4-8 (move 16): Incorrect errcube. Setting to 0.

ERROR! mochy-fanar-2011Sep010308_annotated.xg 10-8 (move 19): Incorrect errcube. Setting to 0.

ERROR! mochy-fanar-2011Sep010308_annotated.xg 10-10 (move 11): Incorrect errcube. Setting to 0.

I downloaded a few matches from http://itikawa.com/ (awesome resource of bg matches by the way!) and analyzed a few games with the latest XG (2.19.208) and imported them to my database and it found a few more (added more useful info on output):

Take blunder but the opponent didn't take: 35547_07_wockadoo-melzi-2011Jul290119_1356168257.xg score: 9-4 (move 1510): Incorrect errtake. doubletake: 1.5041253566742 nodouble: 0.94607001543045 errtake: -2.0082507133484 take: 2

ERROR! 98613_01_melzi-mochy-2011Jun230111_XG2_1355278551.xg score: 8-1 (move 2450): Incorrect errtake. doubletake: 1.196523308754 nodouble: 0.97910833358765 errtake: -1.3930466175079 take: 2

Take blunder but XG says it is double/take: ERROR! 16191_melzi-mochy-2011Jun300220_1355279724.xg score: 6-5 (move 326): Incorrect errtake. doubletake: 0.65758883953094 nodouble: 0.64467006921768 errtake: -0.65758883953094 take: 2

Known issue?

As for my server you can run into some bogus data but I suspect the valid data vastly outnumber these bogus entries.

Messages In This Thread

• Odd XG bug
  Terje Pedersen -- Tuesday, 28 April 2015, at 2:16 p.m.
  • Odd XG bug
    Bob Koca -- Tuesday, 28 April 2015, at 2:19 p.m.
    • Odd XG bug
      Terje Pedersen -- Tuesday, 28 April 2015, at 2:52 p.m.
      • Odd XG bug
        adrianov -- Tuesday, 28 April 2015, at 7:28 p.m.
        • Odd XG bug
          Terje Pedersen -- Wednesday, 29 April 2015, at 10:30 a.m.
  • Odd XG bug
    Michael Petch -- Wednesday, 29 April 2015, at 3:11 p.m.
  • Odd XG bug
    eXtreme Gammon -- Wednesday, 29 April 2015, at 3:43 p.m.
    • Odd XG bug
      Terje Pedersen -- Wednesday, 29 April 2015, at 4:22 p.m.