Queens vs Knights

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Nordlandia
Posts: 2821
Joined: Fri Sep 25, 2015 9:38 pm
Location: Sortland, Norway

Re: Queens vs Knights

Post by Nordlandia »

I recommend analyse such position with Komodo, mainly because K has queen redundancy activated. Stockfish does not.
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hgm
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Joined: Fri Mar 10, 2006 10:06 am
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Full name: H G Muller

Re: Queens vs Knights

Post by hgm »

It shouldn't matter much. Obviously Stockfish sees it has to give a lot of Queens for Knights, to make its score drop from +22 to +3. And it would always know that it is better to get two Knights for a Queen than just one, irrespective of redundancy. It would only be problematic if it would pass on the opportunity to get 2-for-1, because it thinks it can keep all its Queens. Only to discover later that it has a choice between trading 1-for-1 or getting checkmated.
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Nordlandia
Posts: 2821
Joined: Fri Sep 25, 2015 9:38 pm
Location: Sortland, Norway

Re: Queens vs Knights

Post by Nordlandia »

CuteChess 1.0.0 allow illegal positions fritz gui forbids.

[pgn][Event "?"]
[Site "Cutechess 1.0.0 | i7-5960X 4.1GHz"]
[Date "2017.08.10"]
[Round "?"]
[White "Stockfish_17080610_x64_bmi2"]
[Black "komodo-11.2.2-64bit"]
[Result "0-1"]
[FEN "nnnnknnn/pppppppp/8/8/8/8/PPPPPPPP/1Q1QK1Q1 w - - 0 1"]
[PlyCount "59"]
[SetUp "1"]
[Termination "adjudication"]
[TimeControl "180+2"]

1. f4 {+7.02/22 8.1s} d6 {-4.09/25 14s} 2. b4 {+6.94/23 20s}
Nhg6 {-3.92/23 3.9s} 3. f5 {+7.06/19 3.9s} Ne5 {-3.65/23 3.2s}
4. Qb3 {+6.94/22 18s} b5 {-3.35/27 8.5s} 5. a4 {+6.67/26 9.5s}
bxa4 {-3.32/24 3.7s} 6. Qxa4+ {+6.62/23 3.8s} Nbd7 {-3.28/25 4.7s}
7. Qb1 {+6.58/27 33s} Nab6 {-3.16/25 9.2s} 8. Qaa1 {+6.46/26 20s}
h5 {-3.15/24 3.1s} 9. e4 {+6.57/22 6.5s} d5 {-2.72/25 8.4s}
10. d4 {+5.91/29 24s} Nec4 {-1.82/24 2.5s} 11. e5 {+5.79/28 9.1s}
Nh6 {-1.70/24 3.2s} 12. Qf2 {+5.41/26 5.8s} e6 {-1.31/24 4.0s}
13. Qh4 {+4.96/26 6.2s} exf5 {-1.26/25 3.3s} 14. Qxh5 {+5.42/22 2.1s}
Nfe6 {-1.03/25 4.1s} 15. Qc1 {+4.85/27 19s} Kf8 {-0.59/24 5.8s}
16. Qh4 {+4.27/28 5.1s} Kg8 {-0.48/26 12s} 17. h3 {+4.40/24 2.2s}
f4 {+0.81/24 3.2s} 18. Qh5 {+2.82/25 3.3s} Ne7 {+1.25/24 2.6s}
19. c3 {+3.52/23 1.5s} Nef5 {+1.69/25 5.0s} 20. Kf2 {+1.76/26 3.8s}
Ng3 {+2.04/25 3.4s} 21. Qf3 {+1.64/25 0.70s} Nhf5 {+2.33/24 7.2s}
22. Kg1 {+1.36/28 3.3s} Nce3 {+2.96/25 5.7s} 23. Qa2 {0.00/27 4.1s}
Nbc4 {+3.28/23 3.8s} 24. Qff2 {0.00/26 0.53s} Ng5 {+4.65/23 3.9s}
25. Qa4 {-2.43/24 6.6s} Nf8 {+6.50/21 2.5s} 26. Kh2 {-6.11/25 7.2s}
Nde6 {+9.08/21 2.8s} 27. Qxa7 {-6.97/25 3.9s} N5e4 {+12.10/24 6.4s}
28. Qfa2 {-10.96/22 2.0s} Ncd2 {+14.96/24 4.6s} 29. Qcxd2 {-13.86/25 2.0s}
Ngf1+ {+17.98/25 4.2s} 30. Kg1 {-14.78/28 2.0s, Black wins by adjudication} 0-1

[/pgn]


Image

Lichess analysis - https://lichess.org/C4DGir7U