Very unusual endgame occurrence

[Nordlandia]

2x 2080 Super Overclock
256x20-787.pb with Kiudee settings
Backend roundrobin
NNcache 20,000,000
Komodo contempt at -13
Komodo hash 8192
Komodo table memory 128 mb
Both engines consult 6-men syzygy
CuteChess GUI
Automatic adjudication at 205 moves.
Game duration 4 hours +

[pgn][Event "i7-5960X 4.5GHz "]
[Site "i7-5960X 4.5GHz "]
[Date "2020.01.31"]
[Round "?"]
[White "komodo-13.2.5-64bit-bmi2"]
[Black "lc0"]
[Result "1/2-1/2"]
[SetUp "1"]
[FEN "rnbqkbnr/pppppppp/8/8/8/8/1PPPPPP1/RNBQKBNR w KQ - 0 1"]
[PlyCount "410"]
[EventDate "2020.??.??"]
[TimeControl "2700+30"]

1. e4 {-0.34/28 87s} c5 {0.48/18 37} 2. c3 {-0.43/30 151s} e6 {0.46/20 43} 3.
Bb5 {-0.36/30 115s} Nf6 {0.58/20 81s} 4. e5 {-0.53/30 90s} Nd5 {0.56/23 27} 5.
d4 {-0.51/32 183s} cxd4 {0.56/23 59} 6. cxd4 {-0.48/30 71s} Qb6 {0.51/25 129s}
7. Bc4 {-0.39/30 81s} Bb4+ {0.51/24 0.24s} 8. Kf1 {-0.59/30 89s} d6 {0.49/24 40
} 9. exd6 {-0.61/29 66s} Bxd6 {0.54/19 170s} 10. Nf3 {-0.34/29 85s} Nd7 {
0.60/19 81s} 11. Kg1 {-0.40/30 159s} Kf8 {0.61/20 63s} 12. Nbd2 {-0.48/31 118s}
N7f6 {0.79/17 114s} 13. Bd3 {-0.62/32 137s} Bd7 {0.80/19 104s} 14. Nc4 {
-0.70/31 81s} Qc7 {0.80/21 0.22s} 15. Nfe5 {-0.69/34 186s} Be8 {0.79/19 101s}
16. Nxd6 {-0.83/31 91s} Qxd6 {0.77/22 48} 17. Rh4 {-0.91/31 72s} a6 {0.73/22
233s} 18. Bd2 {-0.80/34 128s} Kg8 {0.77/21 70s} 19. Rc1 {-0.86/33 127s} Qd8 {
0.97/15 70s} 20. Qb3 {-0.93/33 140s} Nd7 {1.14/17 99s} 21. Nf3 {-1.03/33 73s}
Rb8 {1.15/20 51} 22. Re1 {-0.95/35 139s} h5 {1.19/19 93s} 23. Bb1 {-0.99/34 43}
a5 {1.44/14 75s} 24. Qd3 {-1.33/31 148s} Qb6 {1.45/16 74s} 25. Qa3 {-1.33/33
180s} a4 {1.50/17 81s} 26. Ba2 {-1.25/31 51} N7f6 {1.59/16 80s} 27. Ne5 {
-1.33/30 81s} Ra8 {1.63/16 38} 28. Nd3 {-1.35/32 147s} Qd8 {1.73/16 110s} 29.
Ne5 {-1.50/30 103s} b5 {1.87/14 92s} 30. Qf3 {-1.53/30 62s} b4 {1.83/17 110s}
31. Qd1 {-1.51/28 29} Rc8 {1.95/12 100s} 32. Bb1 {-1.57/29 34} Qa5 {1.93/12
136s} 33. Qf3 {-1.57/30 63s} Qb6 {1.92/13 62s} 34. Qg3 {-1.53/30 51} Ra8 {
2.05/13 53} 35. Ba2 {-1.52/29 43} a3 {2.22/18 67s} 36. Nc4 {-1.36/33 32} Qd8 {
2.28/18 41} 37. bxa3 {-1.49/34 30} Bb5 {2.37/18 38} 38. Qd6 {-1.62/34 40} Bxc4
{2.70/20 104s} 39. Qxd8+ {-1.58/34 26} Rxd8 {2.55/22 41} 40. Bxc4 {-1.70/36 33}
bxa3 {2.51/19 31} 41. Rh3 {-1.58/35 32} Ra8 {2.49/20 267s} 42. Ra1 {-1.69/37 42
} Ra4 {2.52/23 0.23s} 43. Bb5 {-1.66/39 118s} Rxd4 {2.90/15 72s} 44. Rd3 {
-1.64/35 33} Rxd3 {2.78/16 35} 45. Bxd3 {-1.67/36 31} g6 {2.70/14 39} 46. Rxa3
{-1.72/34 37} Kg7 {2.63/13 152s} 47. Ra1 {-1.72/33 65s} Rd8 {3.19/11 136s} 48.
Rd1 {-1.77/32 25} Rd7 {3.80/8 71s} 49. g3 {-1.83/35 60s} Kh7 {3.76/8 43} 50.
Kg2 {-1.68/35 55} Kg8 {3.65/8 46} 51. Bb5 {-1.63/33 34} Rb7 {3.61/9 66s} 52.
Ba6 {-1.63/34 30} Ra7 {3.60/9 58} 53. Bd3 {-1.72/35 30} Rd7 {3.58/9 27} 54. Bb5
{-1.66/33 19} Rb7 {3.46/9 85s} 55. Bd3 {-1.68/35 41} Rb3 {3.43/10 21} 56. Bc1 {
-1.70/32 18} Kh7 {3.29/10 33} 57. Bc4 {-1.72/34 42} Rb4 {3.27/9 84s} 58. Ba6 {
-1.77/33 30} Kg7 {3.37/9 44} 59. Rh1 {-1.78/33 30} Rb3 {3.36/8 39} 60. Rd1 {
-1.69/33 30} Kh7 {3.19/9 32} 61. Bf1 {-1.68/33 30} Rb1 {3.21/9 44} 62. Re1 {
-1.82/34 30} Kg8 {3.33/8 37} 63. Bd3 {-1.77/33 30} Rb3 {3.18/9 28} 64. Bf1 {
-1.64/31 19} Rb1 {3.11/9 34} 65. Bc4 {-1.79/35 41} Rb4 {4.23/8 23} 66. Be2 {
-1.93/33 22} h4 {4.28/9 26} 67. gxh4 {-1.95/33 20} Rxh4 {4.16/9 26} 68. Bg5 {
-2.06/36 36} Re4 {4.78/8 70s} 69. Kf1 {-1.99/35 24} Rb4 {5.51/7 28} 70. Rc1 {
-1.79/36 43} Kg7 {5.68/7 32} 71. Rc4 {-2.02/31 19} Rb6 {5.17/7 39} 72. Bf3 {
-1.96/33 46} Rb5 {4.78/7 30} 73. Bd2 {-2.10/31 31} Rb2 {4.73/7 29} 74. Ke1 {
-1.91/32 30} Rb3 {5.35/7 25} 75. Ke2 {-1.95/32 30} Rb8 {4.86/7 41} 76. Kf1 {
-1.91/32 30} Rb2 {4.55/7 29} 77. Ke1 {-1.97/33 30} Rb1+ {4.51/7 30} 78. Ke2 {
-2.02/33 26} Rb3 {4.76/7 28} 79. Bg2 {-1.96/32 34} Rb5 {4.88/7 37} 80. Rc2 {
-2.07/32 30} Rb8 {5.20/7 31} 81. Bf3 {-1.94/32 20} Kh7 {4.88/7 29} 82. Kf1 {
-1.82/33 38} Rb3 {4.55/7 31} 83. Ke2 {-1.98/33 32} Rb5 {4.76/7 32} 84. Kf1 {
-2.02/32 30} Kg7 {4.25/7 31} 85. Ra2 {-1.98/36 30} Rc5 {4.34/7 27} 86. Ra4 {
-2.00/35 30} Rc2 {4.44/7 27} 87. Ke1 {-1.98/34 29} Rc8 {4.35/8 29} 88. Bg2 {
-2.04/34 31} Rb8 {4.57/7 36} 89. Bc1 {-2.02/31 30} Rb1 {4.92/7 26} 90. Kd2 {
-2.02/31 26} Rb5 {4.69/8 23} 91. Rc4 {-1.97/34 34} Nb6 {5.06/7 37} 92. Rc6 {
-1.98/32 30} Nbd5 {4.70/8 18} 93. Bf1 {-2.06/32 30} Rb7 {5.06/7 48} 94. Rc4 {
-2.12/32 21} Rb8 {5.13/7 31} 95. Kc2 {-2.04/30 39} Rh8 {4.67/7 23} 96. Kd2 {
-1.89/30 30} Rd8 {4.62/7 36} 97. Ke2 {-1.95/32 30} Rb8 {5.07/7 22} 98. Bg2 {
-1.97/30 22} Rb5 {4.65/7 33} 99. Bd2 {-2.13/30 37} Rb2 {4.35/7 35} 100. Ke1 {
-1.88/32 17} Rb3 {4.26/7 31} 101. Ke2 {-1.84/33 20} Rb2 {3.97/7 30} 102. Ke1 {
-1.97/33 33} Ra2 {3.77/7 30} 103. Bf3 {-1.85/33 40} Ra3 {3.76/8 28} 104. Ke2 {
-1.90/33 25} Ra1 {3.61/8 28} 105. Bc1 {-1.82/34 42} Rb1 {3.61/9 17} 106. Bd2 {
-1.75/33 31} Rg1 {3.66/10 21} 107. Rc1 {-1.80/33 21} Rxc1 {3.63/12 22} 108.
Bxc1 {-1.96/34 42} Nh5 {3.65/12 17} 109. Kf1 {-2.02/37 30} Nhf4 {4.16/9 69s}
110. Bd1 {-2.07/35 30} f6 {4.31/8 26} 111. Bd2 {-2.06/38 30} g5 {4.40/8 40}
112. Bc2 {-2.01/33 30} Kf7 {4.47/7 28} 113. f3 {-1.91/33 18} Ng6 {4.11/8 27}
114. Kf2 {-1.75/37 25} Nge7 {3.79/8 31} 115. Bd3 {-1.77/37 46} Nf5 {3.72/8 37}
116. Bc1 {-1.73/35 21} Nfe7 {3.50/8 27} 117. Bc4 {-1.77/39 33} Ng6 {3.47/8 30}
118. Bd2 {-1.81/37 36} Ne5 {3.62/8 26} 119. Bf1 {-1.82/37 20} Kf8 {3.68/8 37}
120. Bc1 {-1.80/38 33} Ng6 {3.60/8 21} 121. Ba3+ {-1.81/37 37} Kf7 {3.52/8 36}
122. Bc4 {-1.82/36 18} Nde7 {3.46/8 23} 123. Bb5 {-1.82/37 28} Nf5 {3.54/8 26}
124. Bf1 {-1.83/38 37} Nf4 {3.45/8 38} 125. Ba6 {-1.83/35 20} Ng6 {3.30/8 35}
126. Bc5 {-1.84/40 32} Ne5 {3.67/8 20} 127. Be2 {-1.85/38 20} Kg7 {3.59/8 40}
128. Bb6 {-1.86/38 40} Ng6 {3.53/8 22} 129. Bd3 {-1.86/39 44} Kf7 {3.61/8 31}
130. Bc5 {-1.87/39 20} Nfe7 {3.39/8 34} 131. Bb5 {-1.87/41 17} Nf4 {3.20/8 33}
132. Ba3 {-1.87/40 20} Nfd5 {3.03/8 30} 133. Bd3 {-1.88/41 22} Nf4 {3.03/8 23}
134. Bb5 {-1.88/39 53} Nf5 {3.01/9 20} 135. Bc5 {-1.89/40 25} Kg7 {3.05/8 45}
136. Bc4 {-1.89/39 18} Kf7 {2.93/9 27} 137. Ba7 {-1.89/38 21} Nd6 {2.98/8 34}
138. Bb3 {-1.89/37 23} Nd3+ {3.03/9 15} 139. Ke3 {-1.89/39 20} Ne5 {2.94/10 31}
140. Kf2 {-1.89/39 26} Nf5 {2.91/9 21} 141. Bc2 {-1.89/40 25} Ne7 {2.84/9 54}
142. Bd4 {-1.89/38 45} N5g6 {2.81/9 30} 143. Bc3 {-1.90/39 32} f5 {2.81/9 24}
144. Bb3 {-1.90/43 22} Nf4 {2.77/9 30} 145. Bc4 {-1.90/43 21} Ned5 {2.68/9 32}
146. Be5 {-1.90/42 22} Nb6 {2.74/9 31} 147. Bb5 {-1.90/45 26} Nbd5 {2.66/9 26}
148. Bc4 {-1.90/41 21} Nb6 {2.63/9 36} 149. Ba6 {-1.90/39 20} Nd7 {2.68/9 22}
150. Bc3 {-1.91/39 30} Nf6 {2.62/9 33} 151. Bd4 {-1.91/42 25} N4d5 {2.70/8 34}
152. Bb5 {-1.91/44 27} Ng8 {2.68/8 28} 153. Bc4 {-1.91/40 26} Nge7 {2.61/9 33}
154. Bb2 {-1.92/41 23} Nc7 {2.55/9 30} 155. Be5 {-1.92/41 27} Ne8 {2.55/9 24}
156. Bb5 {-1.92/46 25} Nf6 {2.58/9 35} 157. Bc3 {-1.92/41 24} Nfd5 {2.56/9 30}
158. Bb2 {-1.93/42 29} Ng8 {2.54/9 29} 159. Bc4 {-1.93/43 27} Nge7 {2.50/9 26}
160. Be5 {-1.93/44 29} Nf6 {2.52/9 32} 161. Bb2 {-1.94/45 51} Nfd5 {2.46/9 29}
162. Bb5 {-1.94/43 23} Ng8 {2.43/9 33} 163. Bd4 {-1.94/38 25} Nde7 {2.48/9 27}
164. Bc4 {-1.95/43 54} Nf6 {2.43/9 34} 165. Be3 {-2.00/42 78s} f4 {2.42/9 17}
166. Bb6 {-2.02/37 41} Nd7 {2.39/10 45} 167. Bd4 {-1.96/35 20} Nf5 {2.38/10 14}
168. Ba1 {-1.95/36 25} Nf6 {2.37/9 34} 169. Ke2 {-1.94/34 41} Ng8 {2.35/8 38}
170. Bb5 {-1.94/33 20} Nh4 {2.30/8 35} 171. Bb2 {-1.94/37 22} Nf5 {2.21/9 27}
172. Kf2 {-1.94/35 19} Nd6 {2.21/9 28} 173. Bd7 {-1.95/36 21} Nc4 {2.25/10 22}
174. Ba1 {-1.96/37 40} Ne3 {2.24/9 34} 175. Ke2 {-1.96/38 22} Nd5 {2.21/9 37}
176. Bb5 {-1.96/39 21} Nde7 {2.17/9 31} 177. Bb2 {-1.96/41 25} Nh6 {2.11/9 31}
178. Kd2 {-1.96/36 26} Nhf5 {2.10/9 26} 179. Kd3 {-1.96/37 33} Ng6 {2.12/9 28}
180. Bc4 {-1.97/36 26} Ng3 {2.12/10 28} 181. Bb3 {-1.97/37 28} Ke7 {2.11/13 30}
182. Bd1 {-1.97/36 31} e5 {2.21/14 19} 183. Bc3 {-1.98/38 24} Ke6 {2.22/15 30}
184. Bb3+ {-1.98/40 27} Kf5 {2.25/17 15} 185. Bd5 {-1.98/41 37} g4 {2.27/17 17}
186. fxg4+ {-1.98/40 21} Kxg4 {2.28/16 15} 187. Bb4 {-1.98/42 27} Kf5 {2.34/14
32} 188. Bd6 {-1.99/42 26} Kf6 {2.37/14 17} 189. Bb8 {-1.99/44 25} Nf8 {
2.57/12 46} 190. Bc6 {-1.99/43 31} Ne6 {2.56/13 34} 191. Bb7 {-1.99/42 25} Nf5
{2.51/14 45} 192. Bc8 {-1.99/42 29} Nc5+ {2.62/14 38} 193. Kc4 {-1.86/40 24}
Na4 {2.64/16 14} 194. Kb5 {-1.87/41 31} Nb2 {2.66/16 27} 195. Bb7 {-1.88/39 23}
Ne3 {2.69/16 16} 196. Bd6 {-1.86/41 44} Nd3 {2.75/13 76s} 197. Bc7 {-1.87/41 30
} Ke6 {2.71/14 20} 198. Bb8 {-1.87/42 104s} Kf5 {2.61/13 49} 199. Bc8+ {
-1.88/38 30} Ke4 {3.34/12 18} 200. Bb7+ {0.00/50 19} Kd4 {3.41/12 15} 201. Bf3
{0.00/53 21} Nf5 {3.12/12 47} 202. Bg2 {0.00/59 22} Ne1 {3.24/12 18} 203. Bb7 {
0.00/58 24} Nd3 {2.70/16 22} 204. Bg2 {0.00/56 24} Ne3 {2.58/18 20} 205. Bf3 {
0.00/56 22} Nf1 {adjudication +2.02/18 29s, Draw by adjudication} 1/2-1/2
[/pgn]

[d]3r4/5pk1/4pnp1/3n3p/8/3B4/3B1PP1/R5K1 w - - 0 48

[d]8/5pk1/4pnp1/3n4/8/5B2/4KP2/2B5 b - - 0 108

Can black make any progress here?

[Spliffjiffer]

i dont believe that white can hold the 2nd position together whatever he tries !?
just 2 lines that might illustrate this:

one with the f2-pawn pushed to f3:

108. ... Nh5 109. Kf1 Nhf4 110. Bd1 Kf6 111. Bd2 Kf5 112. f3 Ke5 113. Ba4 Kd4 114. Kf2 g5 115. Be8 f6 116. Bf7 f5 117. Ba5 e5 118. Bd8 Nc3
119. Be8 e4 120. fxe4 Nxe4+ 121. Kg1 Ne6 122. Bb6+ Ke5 123. Bd7 g4 124. Kh2
Nf6 125. Bc8 f4 126. Ba7 Nd5 127. Bd7 Kf6 128. Bf2 Nc3 129. Bh4+ Kf5 130.
Bf2 Ne4 131. Ba7 Ng5 132. Bf2 Nf3+ 133. Kg2 Kf6 134. Bc8 Nd2 135. Ba7 Nc4
136. Ba6 Ne5 137. Bf2 Ng6 138. Kf1 Ne7 139. Be2 Kf5 140. Bb5 Ke5 141. Bd7
Nf5 142. Bb6 f3 143. Kg1 Kf6 144. Bc6 Kg5 145. Bb7 Nd6 146. Bd5 Nf4 147.
Bc6 Nf5 -+

and one with the f2-pawn untouched:

108. ... Nh5 109. Kf1 Nhf4 110. Bd1 Kf6 111. Bb2+ Kg5 112. Bc2 f6 113. Ba3 e5 114. Bd6 Kg4 115. Bd1+ Kh4
116. Bc2 g5 117. Bc5 g4 118. Ke1 Kg5 119. Bd6 Nb6 120. Kf1 Nfd5 121. Bd3
Na4 122. Ba6 Nac3 123. Bb7 Kh4 124. Bc8 g3 125. Bf8 Nf4 126. fxg3+ Kxg3
127. Bg7 Ncd5 128. Bb7 Kg4 129. Kf2 e4 130. Bc8+ Kg5 131. Bb7 Kf5 132. Bh6
Nd3+ 133. Kg3 N5f4 134. Ba8 Ke5 135. Kg4 Ne6 (or simply f5+) -+


in the 2nd line i was already seriously tired and i hope i didnt miss some miraculous defense for white.
i seriously doubt that white can come up with major improvements vs blacks ideas but who knows maybe im wrong, in eighter way, it was a nice endgame marathon to analyse
(investigation-time: around 10-12 hours)