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by peter
Tue Oct 15, 2019 6:48 pm
Forum: Computer Chess Club: General Topics
Topic: Winning after Qf6+!
Replies: 79
Views: 1952

Re: Winning after Qf6+!

zullil wrote:
Tue Oct 15, 2019 4:24 pm
I don't have any pgn files. Others do.
Thanks for answering, Louis. But it was you, opening this can of worms again, you see?
:)
by peter
Tue Oct 15, 2019 6:22 am
Forum: Computer Chess Club: General Topics
Topic: Winning after Qf6+!
Replies: 79
Views: 1952

Re: Winning after Qf6+!

I am confused. If I didn't miss something from this thread, After Ng5 of white, both Nxd4 and Nd6 (on Nxa3 line) of black was already posted by Peter and both ends up in a win. So IMO, both Ng4 and Bd2 wins for white. No, Mike, you missed Louis' fortress- line after 26...Nd6 (!) which I had to be s...
by peter
Mon Oct 14, 2019 5:40 am
Forum: Computer Chess Club: General Topics
Topic: Winning after Qf6+!
Replies: 79
Views: 1952

Re: Winning after Qf6+!

Peter, is it easy to see where this line deviates from the line you previously had in this position that seemed to draw? (I don't think you posted it.) I didn't. I made the once and always main mistake to look at an output only without playing it out and having some Forward Backward with it. The on...
by peter
Sun Oct 13, 2019 7:24 pm
Forum: Computer Chess Club: General Topics
Topic: Winning after Qf6+!
Replies: 79
Views: 1952

Re: Winning after Qf6+!

1. Qf6+ Bxf6 2. gxf6+ Kg8 3. Ng5 Nxa3 4. Rxh7 Nb5 5. h4 Nxd4 1r3rk1/5p1R/1qb1pPp1/3pP1N1/p1pn3P/1pP5/1P2B3/3RB2K w - - 0 6 Stockfish-dev says: +9.24 6. Rg7+ Kh8 7. cxd4 c3 8. Bxc3 Bb5 9. Rh7+ Kg8 10. Bg4 Qa6 11. Rg7+ Kh8 12. Rd2 a3 13. h5 a2 14. hxg6 a1=Q+ 15. Bd1 Qxd1+ 16. Rxd1 fxg6 17. Bb4 Bd3 18...
by peter
Sun Oct 13, 2019 6:56 pm
Forum: Computer Chess Club: General Topics
Topic: Winning after Qf6+!
Replies: 79
Views: 1952

Re: Winning after Qf6+!

Qf6+ is best move , but it's just a draw after doing an overnight search with about 1.4 trillion nodes searched. Maybe if somebody searched 100 trillion nodes, they might find something different. That would require dually epyc processors for about a week. Some quick 5 min analysis dep score nodes ...
by peter
Sun Oct 13, 2019 4:28 pm
Forum: Computer Chess Club: General Topics
Topic: Winning after Qf6+!
Replies: 79
Views: 1952

Re: Winning after Qf6+!

Stockfish-dev has the following: [Event ""] [Site ""] [Date ""] [Round ""] [White ""] [Black ""] [Result ""] [FEN "1r3r2/4bpkp/1qb1p1p1/3pP1P1/p1pP1Q2/PpP2N1R/1Pn1B2P/3RB2K w - - 0 1"] [Setup "1"] 1. Qf6+ Bxf6 2. gxf6+ Kg8 3. Ng5 Nxa3 4. Rxh7 Nb5 5. h4 Nd6 6. Bg3 Qd8 7. Rg7+ Kh8 8. Kg2 Ne8 9. Rxf7 ...
by peter
Sun Oct 13, 2019 3:56 pm
Forum: Computer Chess Club: General Topics
Topic: Winning after Qf6+!
Replies: 79
Views: 1952

Re: Winning after Qf6+!

1. Qf6+ Bxf6 2. gxf6+ Kg8 3. Ng5 Nxa3 4. Rxh7 Nb5 5. h4 Nd6 1r3rk1/5p1R/1qbnpPp1/3pP1N1/p1pP3P/1pP5/1P2B3/3RB2K w - - 1 6 Stockfish-dev doesn't seem to see this as winning for White. Evaluation seems stable at 1.40 or so. Try to give in 6. (27.) Bg3 at once already there and then wait and see. To b...
by peter
Sun Oct 13, 2019 3:45 pm
Forum: Computer Chess Club: General Topics
Topic: Winning after Qf6+!
Replies: 79
Views: 1952

Re: Winning after Qf6+!

Does this mean Ng5 line instead of Bd2 also wins? No, that was after a blunder of Black again, 22. Qf6+ Bxf6 23. gxf6+ Kg8 24. Ng5 (?) Nxa3 25. Rxh7 Nb5 26. Rg7+ Kh8 27. h4 Nd6 ? It was just an output- line of Fat Fritz. http://talkchess.com/forum3/viewtopic.php?p=815375#p815375 ... BTW Fat Fritz a...
by peter
Sun Oct 13, 2019 2:06 pm
Forum: Computer Chess Club: General Topics
Topic: Winning after Qf6+!
Replies: 79
Views: 1952

Re: Winning after Qf6+!

peter wrote:
Sun Oct 13, 2019 1:34 pm
and Bh3 could be played already there as well,
Typo: Bg3, not Bh3. Anyhow Bg3 already works from your position onwards as well, even already from 27.h4 Nd6(?) at once.
by peter
Sun Oct 13, 2019 1:34 pm
Forum: Computer Chess Club: General Topics
Topic: Winning after Qf6+!
Replies: 79
Views: 1952

Re: Winning after Qf6+!

Hi Louis! 27.h4 is still drawn, but 27...Nd6 (?) (...Nxd4 instead holds) loses, yet not as soon as after 28..Qd8( ?) (better 28...Ne8). Are you saying that White wins here? 1r3rk1/5p1R/1qbnpPp1/3pP1N1/p1pP3P/1pP5/1P2B3/3RB2K w - - 1 6 Stockfish-dev isn't seeing it. Actually I was writing about this ...