Here Mephisto RISC II (Gideon 3.1) misevaluated the position and fell into a lost endgame by playing 56. Rd8 and displaying the eval 0.00
[pgn]
[Event "banksia game"]
[Site "?"]
[Date "2021.09.30"]
[Round "?"]
[White "Mephisto RISC II (Gideon 3.1)"]
[Black "CT800 Version 1.43"]
[Result "0-1"]
[ECO "B07"]
[PlyCount "158"]
[EventDate "2021.??.??"]
[TimeControl "40/7200+1:0"]
1. e4 d6 {-0.01/1 10 1} 2. d4 c6 {-0.01/1 10 1} 3. Nc3 Nf6 {-0.01/1 10 1; B07:
Pirc, Ufimtsev-Pytel variation} 4. f4 g6 {-0.01/1 10 1} 5. Nf3 Bg7 {-0.01/1 10
1} 6. Bd3 O-O {-0.01/1 10 1} 7. O-O Bg4 {0.01/21 166328 230891271} 8. h3 Bxf3 {
0.01/22 130433 200957177} 9. Qxf3 (9. Rxf3 Nfd7 $14) 9... Qb6 {0.01/21 133386
200305325. B09: Pirc Defence: Austrian Attack.} 10. Ne2 Nfd7 {0.01/22 154342
227156304} 11. Be3 {[#]} Qxb2 $146 {2.55/23 176576 279824510} (11... c5 $16 {
1.11/23}) ({Predecessor:} 11... c5 12. c3 Nc6 13. dxc5 dxc5 14. e5 a5 15. Rad1
Qxb2 16. Qe4 Qb6 17. Bc4 Ndb8 {1-0 (85) Detela,W (2365)-Huber,K (2166) ICCF
email 2006}) 12. Rab1 $18 {[#] Skewer} Qa3 {0.01/21 187479 245122255} 13. Rxb7
Qxa2 {3.55/23 280960 373090912} (13... Nb6 {2.25/21 was necessary.} 14. e5 (14.
Rxe7 N8d7 $16) 14... Na6 15. exd6 (15. Qxc6 Nb4 $16) 15... exd6) 14. f5 Qa4 {
0.30/19 278375 435888618} 15. Rfb1 Qa5 {0.30/18 275686 193473663} 16. Bg5 Re8 {
0.30/18 158197 160666015} 17. fxg6 hxg6 {0.17/18 267735 236067196} 18. Bc4 $1
Ne5 {0.01/20 273487 232935950} (18... Bf6 19. h4) 19. dxe5 Qc5+ {1.40/21
156114 133657929} 20. Kh1 Qxc4 {-0.13/6 33 15901} 21. exd6 exd6 {1.28/23
188809 313861537. With the idea ...Na6.} 22. R1b4 Qa2 {1.19/24 201320 328162649
} 23. Rb3 Qa1+ {1.42/24 204346 333049591} 24. Ng1 Rf8 {1.03/24 191451 327984819
} 25. Be7 {[#] Double Attack} Nd7 {1.60/25 219240 379610080} 26. Bxf8 $2 {
0.95/24} (26. Rxd7 $18 {3.50/24} Bd4 27. Re3 $1) 26... Rxf8 $16 {0.80/26
233899 409260508} 27. Ra3 ({Inferior is} 27. Rxd7 Bd4 $17) 27... Qc1 {0.64/27
202224 349848873} 28. Qe3 ({Don't go for} 28. Rxd7 $2 Bd4 $19) 28... Qxe3 {
0.79/28 303889 543368062} 29. Rxe3 Bd4 {0.75/26 214535 384326142} 30. Ra3 Rd8 {
1.75/28 234502 434923001} (30... Nc5 $14 {0.62/29} 31. Rbxa7 Nxe4) 31. Rc7 {
0.38/25} (31. Nf3 $18 {1.75/28} Bb6 32. Ng5) 31... Ne5 $1 $14 {0.41/27 178360
339909259} 32. Nf3 Bb6 {0.48/28 226381 305157947} 33. Nxe5 Bxc7 {0.72/6 30 2858
} 34. Nxc6 $11 {Endgame Double Attack. KRB-KRN} Re8 {0.48/25 171740 284092975}
35. Rxa7 Bb6 {0.61/25 184987 262559895} 36. Ra4 {0.00/32} (36. Rb7 $14 {
0.46/32 feels stronger.} Bf2 37. Rb8 Rxb8 38. Nxb8) 36... d5 {0.40/24 263485
466138905} 37. Ra6 Bc7 {0.25/28 246651 489883197} 38. Ra7 Bg3 {0.12/26 218862
439127161} 39. Ne7+ Kg7 {0.01/28 229146 451751137} 40. Nxd5 ({But not} 40. exd5
$2 Bd6 $19) 40... Rxe4 {0.01/28 404822 796691908} 41. Ra1 Rd4 {0.10/25 166096
328058914} 42. Ne3 Re4 {0.01/26 154006 303028063} 43. Nf1 Be5 {0.01/27 163184
319854632} 44. Rd1 f5 {0.01/25 153916 300842067} 45. Kg1 Bd4+ {0.01/27 239155
482681475} 46. Kh2 Be5+ {0.01/27 179001 341709423} 47. Kh1 Kf7 {0.01/25 153594
306591694} 48. Rd2 Ke6 {0.00/27 239231 490649773} (48... Re1 {is more complex.}
49. Kg1 Bg3 50. Rd3 f4 51. Rc3 Kf6) 49. Kg1 Bd4+ {0.00/27 237358 499693870} 50.
Kh2 Bc3 {0.00/27 235442 474405437} 51. Rd3 Be5+ {0.00/26 145109 284106812} 52.
Kg1 Bd4+ {0.00/26 159757 318688577} 53. Kh1 Be5 {0.01/23 236536 496404950} 54.
Rd2 Re1 {-0.01/27 186432 372644919} 55. Kg1 Bf4 {-0.01/30 154113 326171214} 56.
Rd8 {-2.17/26 Black keeps a firm grip on the game.} (56. Rd3 $11 {0.00/36})
56... Be3+ $19 {-1.81/26 148937 339016248. Black has strong compensation.} 57.
Kh2 Bg5 {-1.82/25 139258 307989827} 58. Re8+ Be7 {-0.11/6 47 1742} 59. Ng3 f4 {
-1.83/24 153285 230837960} 60. Nh1 $2 {-6.12/24} (60. Rc8 {-2.17/28}) 60... Re2
$1 {-2.47/24 181773 329209206} 61. Rg8 Kf7 {-2.59/26 256086 621654313. ( -> ...
f3)} 62. Rc8 f3 $1 {-2.98/28 220298 464846155} 63. Kg1 Rxg2+ {-3.00/28 214084
429287687} 64. Kf1 Rh2 $1 {-2.99/26 187161 348059287} 65. Ng3 Rxh3 {-3.22/27
147327 292017232} 66. Ne4 Bh4 {-3.41/26 179420 337719160} 67. Kg1 g5 {-3.57/25
200559 398684604} 68. Rc5 g4 {-3.93/26 225766 490670126} 69. Rf5+ Ke6 {-4.65/
25 128414 288453593} 70. Rf4 Ke5 $1 {-8.14/25 231192 577520758. Black mates.}
71. Rxg4 Kf5 {-8.15/23 173926 457029262} 72. Rxh4 Rxh4 {-3.73/6 23 6125. KR-KN}
73. Nf2 Rc4 {-12.24/21 215041 557887943} 74. Nd1 Kf4 {-12.31/21 245559
647730024} 75. c3 Kg3 {-12.34/21 182693 482430209} 76. Nf2 Rh4 {-13.11/21
163675 411514094} 77. Kf1 Ra4 {M+13/21 281484 746422284} 78. Nh1+ Kf4 {M+11/20
91787 224327488} 79. Kg1 Ke3 { M+10/18 43773 103775585 White Resigned. Weighted Error Value: White=0.32/Black=0.19} 0-1
[/pgn]
