Don you are right. Output Houdini at depth 29/84 after ~3h
Analysis by Houdini 1.5a x64 1T:
1. -+ (-1.47): 26...Qa4 27.Bxd5 Rb1+ 28.Kh2 Qd1 29.Qxd1 Rxd1 30.Ne3 Rd2
2. -/+ (-0.92): 26...Qb6 27.Bxd5 Rb1+ 28.Ne1 Qf5 29.Qc2 Qxh5 30.Bf3 Qg6
3. -/+ (-0.92): 26...Qb5 27.Bxd5 Rb1+ 28.Ne1 Qf5 29.Qc2 Qxh5 30.Bf3 Qg6
so it turns out 26...Rb5 is the losing move for black:
Best move for white is maybe 25.Nh4 with an small advantage
Hard test set talkchesscom-2012
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Re: Hard test set talkchesscom-2012 (Uhlmann-Anand)
You're right, it was already discussed more than 10 years agojdart wrote:Regarding this one (#138 in the Sept. version):
[Event "OHRA-B"]
[Site "Amsterdam"]
[Date "1990.??.??"]
[Round "4"]
[White "Uhlmann, Wolfgang"]
[Black "Anand, Viswanathan"]
[Result "1-0"]
[WhiteElo "2505"]
[BlackElo "2610"]
[Annotator "Ribli"]
[SetUp "1"]
[FEN "1r1r2k1/p3np2/2qp1p1p/3np2P/2p5/B1P2BP1/P1Q2PN1/3R2K1 w - - 0 25"]
[PlyCount "13"]
[EventDate "1990.07.??"]
25. Rxd5 $1 Nxd5 26. Qd2 $18 Rb5 27. Qxh6 {/\ Bf3-e4} Ne3 28. Qxe3
(28. Bxc6 $2 Rb1+ 29. Kh2 Ng4+) 28... d5 29. Qh6 Rb1+ 30. Kh2 Rf1 31. Be7 1-0
It is not clear to me White has advantage after 26. .. Qa4 (not considered by Ribli):
[d] 1r1r2k1/p4p2/3p1p1p/3np2P/q1p5/B1P2BP1/P2Q1PN1/6K1 w - - 0 27

http://www.stmintz.com/ccc/index.php?id=159679
I'll take out this position.
Did you already study others positions ?

I've so few feedback for this suite ...
Thanks
