MikeGL wrote: ↑Thu May 09, 2019 1:23 am
Complete game with your Nf1 possibility inserted at move 35 and black still has positional dominance to compensate for the exchange sac:
The line you give after 35.Qa1 Na4 36.Nf1
(
35. Qa1 Na4 36. Nf1 Bxf1 37. Kxf1 Qe4 38. Kg1 Rb3
)
is only 5 plies long, Mike, after those I have this:
Analysis by Cfish 060519 64 POPCNT NUMA:
39.Tf2 Sxc3 40.a4 Kd7 41.Dc1 Sxa4 42.Da1 Tb4 43.Da3 Ke6 44.Td1 Kf7 45.Te1 Kf6 46.Dc1 Tc4 47.Dd2 Sc3 48.Tc1 Sb5 49.Txc4 dxc4 50.Dxa5 Db1+ 51.Tf1 Dc2 52.Dd8+ Kf7 53.Dd7+ Kf8 54.Dc8+ Ke7 55.Db7+ Ke6 56.Dc8+ Kf7
= (0.00) Tiefe: 60/36 00:06:50 10444MN
How does Black continue to take advantage of its "positional dominance"? It can get the white a- and c- Pawn, but then the free black a-Pawn doesn't make it against White's quality of Rook against Night. Not as far as I can see. In best or worst case, depending from which side you look at it, White can give back quality in exchange against this remaining pawn at a- line. So what?
And then there are still the Queens on board, which gives White a second one chance to come into Black's back- ranks chasing King into checks repeated, as seen in output- line above, after Black exchanged Rooks and gave a- Pawn against setting free the one on c-line.
In the game after 35.Dc1(?), which might well be the latest game changing blunder, some other suboptimal moves followed up like 38.Rf2(?), even here Qa1 instead would have given better resistance still, making the real dominance by Black at this point then decisive in a hopeless way from White's side. Yet at this point (38.ff) White's already in Zugzwang, which is the real reason for SF not to see the danger coming sooner and better.
But up to this 35th move of White, the position is equal. White can build up a fortress, if it doesn't miss the chance for it.
What output and eval does LC0 show there at your hardware?
I have only weak installation of Leela, so better try out with yours, if you'd like to have some playout from there onwards, I'll be glad to check your LC0- lines with SF at my hardware with CPU much stronger then GPU.
27...Rxc3 is a good and a beautiful move, but after all, it's just setting up a trap. So I wouldn't call it a game changing single one best move.