Komodo 10.4 released

[carldaman]

Do principle of "Major Piece Redudancy" affects Komodo evaluation if there is two queens for one side, and many pieces remaining elsewhere on the board?

Penalty for the Queen pair (Larry Kaufman called it "principle of redundancy" although how much of penalty implied is unknown. In theory rook pair, knights and queens suffers from this.

Viktor Korthnjoi --->

Hypothesis "Having two Qs may be clearly worse than having a Q and 2 Rs. That would definitely be a special case.

During the analysis, I discovered something very remarkable: the board is simply too small for two Queens of the same color. They only get in each other's way. I realize that this might sound stupid, but I fully mean it. The advantage is much less than one would expect by counting material.

[d]1rbqnk2/4ppbp/p2p2p1/2p5/2P1PP2/3P2PP/1P1QN1B1/q1BNRRK1 w - - 0 1

Besides redundancy, a simplistic argument would be that the second Queen is only worth a Q-1 since the promoted pawn goes off the board. Add to that the fact that 2R = Q+1 and you already have a 2 point deficit when comparing a 2nd Q to 2R.

The diagram shows R + N for the queen, not two rooks.

The reply was aimed at the quoted 'hypothesis' statement, not the diagram.

[Nordlandia]

TC: 180m +30s
Hash: 4096 Mb
EGTB: 6-Men
GUI: Fritz 15
OS: Windows 10
-------------------
Komodo settings: Table memory 256 | Contempt 0
-------------------
Houdini settings: Default settings
-------------------
[pgn][Event "i5-5200U, Slow 180m+30s"]
[Site "DESKTOP-DD1B2QU"]
[Date "2017.03.20"]
[Round "1"]
[White "Komodo 10.4 64-bit"]
[Black "Houdini 5.01 Pro x64-pext"]
[Result "1-0"]
[SetUp "1"]
[FEN "1rbqnk2/4ppbp/p2p2p1/2p5/2P1PP2/3P2PP/1P1QN1B1/q1BNRRK1 w - - 0 1"]
[PlyCount "53"]

1. Qe3 Qaa5 2. Bd2 (2. f5 Be5 3. Bd2 {-0.88/21 Houdini 1.5a x64}) 2... Qac7 (
2... Qab6 3. Bc3 Kg8 {-2.11/21 Deep Fritz 13}) 3. Bc3 (3. Qf2 Kg8 {-0.85/29
Stockfish 8 64}) 3... Kg8 (3... Kg8 {-0.93/28 Stockfish 8 64 BMI2}) 4. Qd2 (4.
Qf2 Rb3 5. f5 {0.00/26 Komodo 10.2 64-bit}) 4... Nf6 (4... Nf6 5. Ne3 Bb7 {
-2.40/17 Deep Rybka 4 SSE42 x64}) 5. g4 (5. Ne3 Nd7 6. Bxg7 {-1.10/27 Komodo
10 64-bit}) 5... e6 (5... Nd7 {-1.30/17 Houdini 3 Pro x64}) 6. Ne3 (6. Ne3 Nd7
{0.16/29 Komodo 10.3 64-bit}) 6... Bb7 (6... Bb7 7. f5 Nd7 {-2.32/16 Deep
Rybka 4 SSE42 x64}) 7. Rf2 (7. g5 Nh5 8. Bxg7 {0.22/27 Komodo 10.2 64-bit})
7... Kh8 (7... Ne8 8. Ref1 Bh6 {-0.89/23 Komodo 10 64-bit}) 8. f5 Ng8 (8...
exf5 9. gxf5 g5 {0.36/26 Komodo 10.2 64-bit}) 9. Bxg7+ Kxg7 (9... Kxg7 10. g5
Qa5 {-0.55/20 Critter 1.6.aa 64-bit}) 10. fxe6 (10. Ref1 Kh8 11. f6 {0.00/28
Stockfish 7 64}) 10... fxe6 (10... fxe6 11. Qc3+ e5 {-0.74/22 Deep Fritz 13})
11. g5 (11. g5 Bc8 {0.68/28 Komodo 10.2 64-bit}) 11... Bc8 (11... Bc8 12. Ref1
e5 {0.00/34 Stockfish 180317 64 POPCNT}) 12. h4 (12. Ref1 e5 13. Nd5 {-0.93/22
Deep Fritz 14 x64}) 12... e5 (12... e5 13. Ref1 Qb7 {-0.99/20 Deep Fritz 14 x64
}) 13. Nd5 Qa5 14. Nec3 (14. Nec3 Bg4 15. Qe3 {0.00/31 Komodo 10 64-bit}) 14...
Kh8 (14... Be6 15. Qe3 Qc8 {-0.21/25 Komodo 8 64-bit}) 15. Qc1 (15. Rff1 Qe8 {
-0.14/31 Stockfish 5 64 SSE4.2S}) 15... Be6 (15... Be6 16. Ref1 Qc8 {-1.06/23
Deep Fritz 14 x64}) 16. Re3 (16. Re3 {1.10/32 Stockfish 8 64}) 16... Qc8 (16...
Qd7 17. Qf1 Qad8 {0.00/23 Houdini 1.5a x64}) 17. Qf1 (17. Qf1 Qad8 18. Ref3 {
0.64/31 Komodo 10 64-bit}) 17... Qad8 (17... Qad8 18. Ref3 {0.61/32 Komodo 10
64-bit}) 18. Ref3 (18. Bh3 {0.24/23 Houdini 4 x64B}) 18... Bg4 (18... h5 19.
Ne3 {2.11/33 Komodo 10.4 64-bit}) 19. Bh3 (19. Rf7 Be6 20. Rc7 {0.36/25 Deep
Fritz 14 x64}) 19... Bxh3 (19... Bxh3 20. Rxh3 Qg4+ {0.00/23 Deep Fritz 13})
20. Rxh3 (20. Rxh3 {1.50/26 Stockfish 7 64}) 20... Qdd7 21. Rg3 (21. Rg3 Qa7
22. Nd1 {3.92/29 Komodo 10.4 64-bit}) 21... Qa7 (21... Qcb7 22. h5 gxh5 {
0.00/21 Fritz 12}) 22. Ne3 (22. Nf6 Qe6 23. Nxg8 {2.41/25 Komodo 9.02 64-bit})
22... Qe6 (22... Qe6 23. Ncd5 a5 {4.83/34 Komodo 10.3 64-bit}) 23. Ncd5 (23.
Rgf3 {4.43/31 Stockfish 8 64}) 23... h5 (23... a5 24. Rgf3 h5 {4.56/31
Stockfish 170317 64 POPCNT}) 24. gxh6 (24. gxh6 {5.77/27 Stockfish 7 64}) 24...
Qh7 (24... a5 25. h5 gxh5 {6.68/31 Stockfish 8 64 POPCNT}) 25. h5 (25. h5 gxh5
26. Nf5 {9.61/34 Komodo 10.4 64-bit}) 25... gxh5 (25... gxh5 26. Rfg2 {6.97/33
Stockfish 8 64 official}) 26. Nf5 (26. Nf5 Rf8 27. Rg7 {9.24/32 Komodo 10.3
64-bit}) 26... Rf8 (26... Nxh6 27. Nxh6 Qexh6 {3.14/16 Deep Rybka 4 w32}) 27.
Rg7 (27. Rg7 Nxh6 28. Rxh7+ {5.31/24 Deep Fritz 14 x64}) 1-0

[/pgn]

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