YAFU : Yet Another Fritz 11 update

[Andre van Ark]

Hi Swami

Readme :

Version 11.7, September 2 - Changes since Rybka release

ChessProgram:

- Node speed display of Rybka 3 was too low.

After the september 2 update Node speed display of Rybka 3 is still too slow

[M ANSARI]

Seems to have a strange bug.

This position is from Leko vs. Ivanchuck. For some reason Rybka 3 and also DF10.1 give a 0.00 score even at high depth, although it obviously looks like white is totally lost ... so much so that Leko resigned in this position. Anyone else getting a 0.00 score in analysis? Try downloading the entire pgn then go to the final position and then infinite analysis ... somehow if you just post the FEN then it sees white is lost. Anyone else get this behavior or is it something only with my system? I am using CB Rybka 3 with latest Frtiz 11 update.

[d]8/6k1/8/6Pp/P2K1Rb1/1P1N1p2/2P1p3/r7 w - - 0 49


[Event "Mukachevo m playoff"]
[Site "Mukachevo"]
[Date "2007.10.28"]
[Round "14"]
[White "Leko, Peter"]
[Black "Ivanchuk, Vassily"]
[Result "0-1"]
[ECO "B80"]
[WhiteElo "2755"]
[BlackElo "2787"]
[PlyCount "96"]
[EventDate "2007.10.28"]
[EventType "match (blitz)"]
[EventRounds "2"]
[EventCountry "UKR"]
[Source "ChessBase"]
[SourceDate "2007.11.02"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e6 7. f3 b5 8. Qd2
Nbd7 9. g4 h6 10. O-O-O b4 11. Na4 Ne5 12. b3 Bd7 13. Nb2 d5 14. Bf4 Qc7 15.
Nd3 Nxd3+ 16. Bxd3 Qb6 17. Ne2 dxe4 18. Bxe4 Rd8 19. Be3 Bc5 20. Bxc5 Qxc5 21.
Qd4 Rc8 22. Ng3 Ke7 23. Rhe1 Qxd4 24. Rxd4 a5 25. Bd3 Rhd8 26. Nf5+ Kf8 27. Nd6
Bc6 28. Be2 Rb8 29. Rd2 Nd5 30. Nc4 Nc3 31. Rxd8+ Rxd8 32. Nxa5 Nxe2+ 33. Rxe2
Bxf3 34. Rf2 Bxg4 35. Nc6 Rd1+ 36. Kb2 f5 37. Nxb4 e5 38. Kc3 e4 39. Rd2 Ra1
40. Rd5 e3 41. Re5 f4 42. Nd3 g5 43. h4 e2 44. hxg5 f3 45. Re4 h5 46. Rf4+ Kg7
47. a4 Rd1 48. Kd4 Ra1 0-1

[Anil]

Following analysis after loading PGN in Arena GUI.

Analysis by ProDeo 1.6:

FEN: 8/6k1/8/6Pp/P2K1Rb1/1P1N1p2/2P1p3/r7 w - - 3 49

Rebeluci:
1 00:00 24 24.000 -4.15 Rf4xg4 h5xg4
1 00:00 72 72.000 -1.33 a4a5
1 00:00 90 90.000 -0.92 b3b4
1 00:00 150 150.000 0.00 Kd4c3
2 00:00 152 152.000 0.00 Kd4c3
3 00:00 329 329.000 0.00 Kd4c3
4 00:00 705 705.000 0.00 Kd4c3
5 00:00 4.527 4.527.000 0.00 Kd4c3
6 00:00 9.000 9.000.000 0.00 Kd4c3
7 00:00 15.007 15.007.000 0.00 Kd4c3
8 00:00 21.920 21.920.000 0.00 Kd4c3
9 00:00 49.761 49.761.000 0.00 Kd4c3
10 00:00 105.149 105.149.000 0.00 Kd4c3
11 00:00 238.060 238.060.000 0.00 Kd4c3
12 00:00 435.215 435.215.000 0.00 Kd4c3
13 00:00 896.105 896.105.000 0.00 Kd4c3
14 00:01 1.526.135 1.526.135.000 0.00 Kd4c3
15 00:02 3.656.919 1.828.459 0.00 Kd4c3
16 00:04 6.786.765 2.262.255 0.00 Kd4c3
17 00:09 15.842.875 1.760.319 0.00 Kd4c3



Analysis by Fruit 2.3:

FEN: 8/6k1/8/6Pp/P2K1Rb1/1P1N1p2/2P1p3/r7 w - - 3 49

Fruit23:
1 00:00 575 0 0.00 Kd4c3
2 00:00 1.279 0 0.00 Kd4c3
3 00:00 1.393 0 0.00 Kd4c3
4 00:00 1.511 0 0.00 Kd4c3
5 00:00 1.669 0 0.00 Kd4c3
6 00:00 1.904 0 0.00 Kd4c3
7 00:00 2.453 0 0.00 Kd4c3
8 00:00 3.743 0 0.00 Kd4c3
9 00:00 5.694 0 0.00 Kd4c3
10 00:00 10.142 0 0.00 Kd4c3
11 00:00 15.840 0 0.00 Kd4c3
12 00:00 27.218 0 0.00 Kd4c3
13 00:00 43.104 0 0.00 Kd4c3
14 00:00 80.882 0 0.00 Kd4c3
15 00:00 138.812 0 0.00 Kd4c3
16 00:00 229.894 0 0.00 Kd4c3
17 00:00 390.131 0 0.00 Kd4c3
18 00:01 693.350 0 0.00 Kd4c3
19 00:01 1.149.169 956.046 0.00 Kd4c3
20 00:02 2.021.562 966.791 0.00 Kd4c3
21 00:04 4.220.941 980.246 0.00 Kd4c3
22 00:07 7.013.352 988.074 0.00 Kd4c3


Analysis by The King 3.5:

FEN: 8/6k1/8/6Pp/P2K1Rb1/1P1N1p2/2P1p3/r7 w - - 3 49

The King 3.5:
3 00:00 300 300.000 0.00 Kd4c3
4 00:00 1.218 121.800 0.00 Kd4c3
5 00:00 4.514 451.400 0.00 Kd4c3
6 00:00 12.056 301.400 0.00 Kd4c3
7 00:00 127.049 276.193 0.00 Kd4c3
8 00:00 160.187 286.048 0.00 Kd4c3
9 00:00 223.279 305.861 0.00 Kd4c3
10 00:01 347.164 337.052 0.00 Kd4c3
11 00:01 521.290 364.538 0.00 Kd4c3
12 00:02 936.654 405.477 0.00 Kd4c3
13 00:05 2.612.019 459.054 0.00 Kd4c3
14 00:13 6.861.635 505.275 0.00 Kd4c3

[Dr.Wael Deeb]

Following analysis after loading PGN in Arena GUI.

Analysis by ProDeo 1.6:

FEN: 8/6k1/8/6Pp/P2K1Rb1/1P1N1p2/2P1p3/r7 w - - 3 49

Rebeluci:
1 00:00 24 24.000 -4.15 Rf4xg4 h5xg4
1 00:00 72 72.000 -1.33 a4a5
1 00:00 90 90.000 -0.92 b3b4
1 00:00 150 150.000 0.00 Kd4c3
2 00:00 152 152.000 0.00 Kd4c3
3 00:00 329 329.000 0.00 Kd4c3
4 00:00 705 705.000 0.00 Kd4c3
5 00:00 4.527 4.527.000 0.00 Kd4c3
6 00:00 9.000 9.000.000 0.00 Kd4c3
7 00:00 15.007 15.007.000 0.00 Kd4c3
8 00:00 21.920 21.920.000 0.00 Kd4c3
9 00:00 49.761 49.761.000 0.00 Kd4c3
10 00:00 105.149 105.149.000 0.00 Kd4c3
11 00:00 238.060 238.060.000 0.00 Kd4c3
12 00:00 435.215 435.215.000 0.00 Kd4c3
13 00:00 896.105 896.105.000 0.00 Kd4c3
14 00:01 1.526.135 1.526.135.000 0.00 Kd4c3
15 00:02 3.656.919 1.828.459 0.00 Kd4c3
16 00:04 6.786.765 2.262.255 0.00 Kd4c3
17 00:09 15.842.875 1.760.319 0.00 Kd4c3



Analysis by Fruit 2.3:

FEN: 8/6k1/8/6Pp/P2K1Rb1/1P1N1p2/2P1p3/r7 w - - 3 49

Fruit23:
1 00:00 575 0 0.00 Kd4c3
2 00:00 1.279 0 0.00 Kd4c3
3 00:00 1.393 0 0.00 Kd4c3
4 00:00 1.511 0 0.00 Kd4c3
5 00:00 1.669 0 0.00 Kd4c3
6 00:00 1.904 0 0.00 Kd4c3
7 00:00 2.453 0 0.00 Kd4c3
8 00:00 3.743 0 0.00 Kd4c3
9 00:00 5.694 0 0.00 Kd4c3
10 00:00 10.142 0 0.00 Kd4c3
11 00:00 15.840 0 0.00 Kd4c3
12 00:00 27.218 0 0.00 Kd4c3
13 00:00 43.104 0 0.00 Kd4c3
14 00:00 80.882 0 0.00 Kd4c3
15 00:00 138.812 0 0.00 Kd4c3
16 00:00 229.894 0 0.00 Kd4c3
17 00:00 390.131 0 0.00 Kd4c3
18 00:01 693.350 0 0.00 Kd4c3
19 00:01 1.149.169 956.046 0.00 Kd4c3
20 00:02 2.021.562 966.791 0.00 Kd4c3
21 00:04 4.220.941 980.246 0.00 Kd4c3
22 00:07 7.013.352 988.074 0.00 Kd4c3


Analysis by The King 3.5:

FEN: 8/6k1/8/6Pp/P2K1Rb1/1P1N1p2/2P1p3/r7 w - - 3 49

The King 3.5:
3 00:00 300 300.000 0.00 Kd4c3
4 00:00 1.218 121.800 0.00 Kd4c3
5 00:00 4.514 451.400 0.00 Kd4c3
6 00:00 12.056 301.400 0.00 Kd4c3
7 00:00 127.049 276.193 0.00 Kd4c3
8 00:00 160.187 286.048 0.00 Kd4c3
9 00:00 223.279 305.861 0.00 Kd4c3
10 00:01 347.164 337.052 0.00 Kd4c3
11 00:01 521.290 364.538 0.00 Kd4c3
12 00:02 936.654 405.477 0.00 Kd4c3
13 00:05 2.612.019 459.054 0.00 Kd4c3
14 00:13 6.861.635 505.275 0.00 Kd4c3

May I ask what is this chess engine:The King 3.5

[AdminX]

No Bug in the Chessbase GUI here, Rybka also shows the same (Kc3) in Aquarium GUI

[Tony Thomas]

May I ask what is this chess engine:The King 3.5

Oh doc, you know well that he is talking about The King 3.50. Since Zero after the '.' and the last non-zero number doesnt really have any value (other than if you are in a chemistry class and trying to get the value to the nearest three significant figures), he probably decided to round it up to a whole 3.5..

[Dr.Wael Deeb]

May I ask what is this chess engine:The King 3.5

Oh doc, you know well that he is talking about The King 3.50. Since Zero after the '.' and the last non-zero number doesnt really have any value (other than if you are in a chemistry class and trying to get the value to the nearest three significant figures), he probably decided to round it up to a whole 3.5..

I am pragmatic Tony and that's where the problem is

[M ANSARI]

Apparently it is how some engines (not only Rybka) handle a repeat position. I guess it must hurt the engine strength if that is not corrected. Some engines handle it OK though.

[Eelco de Groot]

Ricardo Fernandez reported the same behaviour in many engines. In gameplay it is more or less necessary. I think it should be called a bug in analysis and as Harald Johnsen explained at the root this maybe should also not be scored as a draw during a game? Harald also showed a way to repair the bug there. Curious if it also happens in Toga, probably it does?

Eelco

[M ANSARI]

I didn't check with Toga but it happens with DF 10.1 as well. I guess it makes the engine play better somehow in a game ... but it is very annoying in analysis and I still don't really understand why fixing this could be harmful to an engine. I mean for the first and second repeats it should definetely not show a draw score where there is none ... I can understand if it is on the third move and that is the best move.