Fritz 18 BUG still exists in update version 17

[Eduard]

GUI 18 Update 18 released!

I have checked some previously posted 6men positions. The GUI 18 Update 18 makes no mistake here.

New positions:
[d]8/6p1/8/8/4PK1k/8/8/8 b - - 0 45
Here the GUI 18 Update 17 played the wrong move Kh5? The new GUI now says a draw with g5+.

However, pretty much everything is wrong in the following position:

7r/7P/8/7R/3k1p2/5K2/8/8 b - - 0 59

Picture:


Rxh7 draw? Strange!

Next:
8/6K1/4kPP1/8/5rP1/8/8/8 b - - 0 77

Picture:


In this position, the draw comes in 15th place, and in the game Black moved Rf3 (in first place), and lost. Update 18 doesn't play it any better. Sad. I can post more positions (all lost on PlayChess), but there's no point. So I'm sticking with update 10.

I will post more positions when I have time.

[Eduard]

I reinstalled Update 10 because I want to play on PlayChess. Here the last two positions analyzed with update 10, so it must look correct:

New game Line 0.0
7r/7P/8/7R/3k1p2/5K2/8/8 b - - 0 1

Analysis by Smile XPro:

1. +- (1): 59...Kd3
2. +- (1): 59...Kc3
3. +- (1): 59...Kc4
4. +- (1): 59...Rg8
5. +- (1): 59...Rf8
6. +- (1): 59...Re8
7. +- (1): 59...Rd8
8. +- (1): 59...Rc8
9. +- (1): 59...Rb8
10. +- (1): 59...Ra8
11. +- (1): 59...Rxh7
White mates

New game Line 0.0
8/6K1/4kPP1/8/5rP1/8/8/8 b - - 0 1

Analysis by Smile XPro:

1. = (0.00): 77...Rxf6
2. +- (1): 77...Kd5
3. +- (1): 77...Kd6
4. +- (1): 77...Kd7
5. +- (1): 77...Ke5
6. +- (1): 77...Re4
7. +- (1): 77...Rd4
8. +- (1): 77...Rc4
9. +- (1): 77...Rb4
10. +- (1): 77...Ra4
11. +- (1): 77...Rf3
12. +- (1): 77...Rf2
13. +- (1): 77...Rf1
14. +- (1): 77...Rxg4
15. +- (1): 77...Rf5
The position is equal

[cc2150dx]

I have Power Fritz 18 version 11 (dated back from last year) which I believe doesn't exist (more like version 10) I assume should be safe to use with GUI tablebases ?

[Eduard]

I have both GUIs Fritz 18 and Powerfritz 18. I'm not sure, but there was an update 10 for Fritz 18. Powerfritz 18 came out with version 11 without an update. Everything was ok with me then. The errors happen with later Fritz (Powerfritz) updates.

[Krzysztof Grzelak]

Hi Eduard,
I checked it with GUI Fat Fritz update 32 and i got something like in the picture.

[Krzysztof Grzelak]

Unfortunately there is a bug in Fritz 18 Update 18. Just like you write.

[Eduard]

Further Examples from my database (from 2 friends only):

5r2/5P1k/7P/8/4K3/8/5R2/8 b - - 0 113
8/8/K4p2/3Qq3/4P3/4k3/8/8 b - - 0 90
8/5k2/8/8/1B6/5p2/6Kp/8 w - - 0 92
8/4Pk2/2rB4/5p2/8/5K2/8/8 w - - 0 145
8/8/1R4p1/3k4/5PK1/8/5r2/8 b - - 0 67
8/6p1/8/8/4PK1k/8/8/8 b - - 0 45
7r/7P/8/7R/4kp2/8/5K2/8 b - - 0 58
8/6K1/4kPP1/8/5rP1/8/8/8 b - - 0 77
8/8/8/5k2/3P2p1/2N5/6Kp/8 b - - 0 67
8/R7/7P/6pk/4Kr2/8/8/8 w - - 0 70
8/K7/1P2kp2/8/8/5R2/8/1r6 b - - 0 61
8/8/8/P5R1/6p1/5r1k/4K3/8 w - - 0 104
8/8/8/5N2/4k3/8/8/q2K1R2 w - - 0 123
8/6p1/8/2p5/6k1/6P1/5K1P/8 w - - 0 55
8/8/8/5pp1/4k3/4P1K1/5P2/8 w - - 0 113
2k5/8/4K3/8/6p1/6R1/6n1/8 b - - 0 65

[Eduard]

Correction of 8/8/K4p2/3Qq3/4P3/4k3/8/8 b - - 0 90 and PGN:

viewtopic.php?f=2&t=82863&p=954684#p954684

[Eduard]

I checked the positions posted with Fritz 19 Update 4. Everything correct now! GUI finds all 3456 men, and the solutions are correct.

[Shaun]

Hi Eduard,

I have just realised that my gauntlet games have hit this problem, I spotted one game yesterday (just by chance and started searching the web).

[Event "Gauntlet BD 16v3, Blitz 5.0min+5.0sec"]
[Site "?"]
[Date "2023.12.19"]
[Round "46.3"]
[White "Stockfish 16 8T"]
[Black "Stockfish 15.1 8T"]
[Result "1/2-1/2"]
[Annotator "0.17;0.64"]
[ECO "D51"]
[EventDate "2023.12.17"]
[EventType "simul"]
[PlyCount "280"]
[Source "Brewer"]
[SourceTitle "Fritz Engine Tournament"]
[TimeControl "300+5"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c6 5. Bg5 Nbd7 6. cxd5 cxd5 7. e3 Be7 8.
Bd3 O-O 9. O-O b6 10. Rc1 Bb7 11. Qe2 a6 12. Bf4 Nh5 13. Na4 Nxf4 14. exf4 Nf6
15. g3 g6 16. Ne5 Qd6 17. Kg2 Rfc8 18. Rxc8+ Bxc8 19. Nc3 b5 20. Qe3 b4 21.
Na4 Ra7 22. h4 Rc7 23. Nc5 Qb6 24. Rc1 h5 25. Rc2 Bf8 26. Qc1 Bd6 27. b3 Ne8
28. f3 Be7 29. g4 Bd8 30. Qg1 Ng7 31. Kh1 Bf6 32. gxh5 gxh5 33. Rg2 a5 34. Kh2
Kf8 35. Bh7 Qd6 36. Kh3 Qb6 37. Qf2 Qd6 38. Rg1 Bd8 39. Qg3 Bf6 40. Bb1 Ke7
41. Qg2 Kf8 42. Qf2 Qb6 43. Qe2 Ke7 44. Re1 Kf8 45. Rc1 Bd8 46. Rg1 Bf6 47.
Rc1 Bd8 48. Rg1 Bf6 49. Qe1 Qd6 50. Qd1 Ke7 51. Qc1 Bd7 52. a3 Qb6 53. Rg2 Be8
54. Qg1 Kf8 55. a4 Qd6 56. Bh7 Qb6 57. Rc2 Re7 58. Qe3 Qd6 59. Bd3 Kg8 60. Qg1
Rc7 61. Qg3 Qb6 62. Qg1 Qd6 63. Qg3 Qb6 64. Re2 Kf8 65. Bh7 Re7 66. Re1 Rc7
67. Re2 Qa7 68. Kh2 Qb6 69. Rg2 Ke7 70. Rc2 Kf8 71. Rc1 Ke7 72. Kh1 Kf8 73.
Bd3 Kg8 74. f5 exf5 75. Rg1 Rxc5 76. dxc5 Qxc5 77. Bxf5 Qe3 78. f4 Qxg3 79.
Rxg3 Bxh4 80. Rg2 Bf6 81. Nd7 Bc3 82. Kh2 Kh8 83. Re2 Kg8 84. Rg2 Kh8 85. Re2
Kg8 86. Re7 Bd2 87. Bh3 Bxf4+ 88. Kg2 Bg5 89. Re5 f5 90. Rxd5 Bf7 91. Rxa5
Bxb3 92. Kf2 Bh4+ 93. Kg1 Bg5 94. Bg2 Be3+ 95. Kh1 f4 96. Bd5+ Bxd5+ 97. Rxd5
Kf7 98. Ne5+ Ke6 99. Rb5 Ne8 100. Nf3 Nc7 101. Rxb4 Kd6 102. Kg2 Nd5 103. Rb3
Nc7 104. Rb7 Kc6 105. Rb8 Kd5 106. Rc8 Bb6 107. Rf8 Be3 108. Rb8 Na6 109. Rb5+
Bc5 110. Kf1 Nc7 111. Rb8 Be3 112. Ke2 Na6 113. Rc8 Nc5 114. a5 Na6 115. Ne1
h4 116. Rh8 Kc4 117. Rxh4 Kb5 118. Rh5+ Ka4 119. Kd3 Bf2 120. Kd2 Kb3 121. Ke2
Ba7 122. Nd3 Be3 123. Kf3 Kc4 124. Nxf4 Bd4 125. Ng6 Kb3 126. Ne5 Ka3 127. Ke4
Bg1 128. Rh6 Nc7 129. a6 Kb3 130. Rh1 Ba7 131. Rh7 Nb5 132. Rb7 Ka4 133. Nc6
Bc5 134. Kd5 Bg1 135. a7 Nxa7 136. Rb4+ Ka3 137. Ra4+ Kxa4 138. Nxa7 Ka3 139.
Nc6 Ka2 140. Na5 Ka1 1/2-1/2

The GUI bug caused a draw.

I now need to search through games to find these errors.

I have 2 questions (well one has 2 parts so perhaps 3).

Is update 10 the last good update for Fritz 18? and if so where can I download update 10 - a quick Google search failed to find it.
Have you discovered a good way to identify these mistakes? I have 10's of thousands of games to go through.

Thank you (and anyone else) in advance

Shaun