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Subject: Re: Challenge position for engines! (Lots of luck)

Author: Uri Blass

Date: 06:43:04 03/05/02

Go up one level in this thread


On March 05, 2002 at 06:36:58, Ed Schröder wrote:

>On March 05, 2002 at 05:15:38, Uri Blass wrote:
>
>>Yace also likes f5 and has Rh3 in the main line so it seems that finding a
>>better move than Rh3 is not easy.
>>
>>The question is if Rh3 is winning.
>
>I don't know, a further investigation is needed IMO. Rebel gives a +2.30 score
>for Rh3 after 15 plies but probably most of that is coming from eval.
>
>00:00:01.5	1,34	7	416116	Rh3 Kf7 exf5 Bxb3 Qxg6+ Ke7 Rh7+ Rf7
>00:00:02.5	1,34	8	948561	Rh3 Kf7 exf5 Bxb3 Qxg6+ Ke7 Rh7+ Rf7
>00:00:04.9	1,34	9	2379413	Rh3 Kf7 exf5 Bxb3 Qxg6+ Ke7 Rh7+ Rf7
>00:00:08.7	2,22	10	5564762	Rh3 Kf7 exf5 Bxb3 Qxg6+ Ke7 Rh7+ Rf7
>00:00:16.6	2,10	11	12107255	Rh3 Kf7 exf5 Bxb3 Qxg6+ Ke7 Qg5+ Rf6
>00:00:42.6	1,78	12	31920754	Rh3 Kf7 Qh7+ Kf6 Qh4+ Kg7 Bxe6 Qxe6
>00:02:02.0	1,62	13	95158047	Rh3 Kf7 Qh7+ Kf6 Qh4+ Kf7 exf5 Bxb3
>00:06:49.0	2,30	14	322198950	Rh3 Kf7 Qh7+ Kf6 Qh4+ Kg7 Bxe6
>00:14:38.6	2,30	15	688286326	Rh3 Kf7 Qh7+ Kf6 Qh4+ Kg7 Qh7+ Kf6
>
>
>
>>If Rh3 is not winning then it means that Rebel found the right move for the
>>wrong reasons
>
>That's a popular statement in this forum, I once had similar thoughts but
>changed my mind. It does not matter if Nxg6! is played by eval or search, the
>only thing that matters is playing the good move.

yace could not see clear advantage for white even 5 plies after
the root position so I suspected that maybe rebel was wrong in it's line
but it seems that yace after learning can see that
Rh3 is leading to a clear advantage for white so the reason of
Rebel was good enough and maybe Rebel outsearched yace by more than 5 plies.

>
>
>
>>and the question in this case is if Rebel can practically find the
>>winning move in the following position(I did not investigate to find the right
>>move):
>>
>>[D]4qrk1/8/pBn1b1pQ/1p2pp2/4P3/bBPR4/P4PPP/6K1 w - f6 0 4
>>
>>
>>Here is yace main line before f7-f5
>>
>>Analysis by Yace 0.99.56:
>>
>>
>>3...f5 4.Rh3 Kf7 5.exf5 Bxb3 6.fxg6+ Ke7 7.axb3 Rf6 8.Qh7+ Ke6 9.g7 Ne7 10.Rd3
>>Qg6 11.Qh3+ Nf5 12.Bd8
>>  ²  (0.26)   Depth: 12   00:10:16  199936kN
>
>
>[d]4qrk1/8/pBn1b1pQ/1p2pp2/4P3/bBP4R/P4PPP/6K1 b - - 0 1
>
>Following Rebel's analysis
>
>1. Rh3 Kf7 2. Qh7+ Kf6 3. Qh4+ Kg7 4. Bxe6 Qxe6 5. exf5 Qxf5 6. Qh6+ Kf7 7. Rf3
>Qxf3 8. gxf3 1-0
>
>or...
>
>1. Rh3 Kf7 2. Qh7+ Kf6 3. Qh4+ Kg7 4. Bxe6 Qxe6 5. exf5 Qxa2 6. Qh7+ Kf6 7.
>Qxg6+ Ke7 8. Rh7+ Rf7 9. Rxf7+ Qxf7 10. Qxc6 Qxf5
>
>White is a healthy pawn up while the black king is draughty, Rebel's score still
>over 2 pawns, +2.39 to be exactly.
>
>Ed

Yace admitsafter learning that black has problems with Rh3

New position
[D]5r2/6k1/pBn1q1p1/1p2pP2/7Q/b1P4R/P4PPP/6K1 b - - 0 1

Analysis by Yace 0.99.56:

8...gxf5
  -+  (-2.12)   Depth: 1   00:00:04
8...Rxf5
  -+  (-2.36)   Depth: 1   00:00:04
8...Qxf5
  -+  (-2.53)   Depth: 1   00:00:04
8...Qxf5 9.c4
  -+  (-2.35)   Depth: 2   00:00:04
8...Qxf5 9.Qh6+ Kf6 10.Rf3
  -+  (-2.30)   Depth: 3   00:00:04
8...Qxf5 9.Qh6+ Kf7 10.Rf3 g5
  -+  (-1.79)   Depth: 4   00:00:04
8...Qxf5 9.Qh6+ Kf7 10.Rf3 Qxf3 11.gxf3
  ±  (1.27)   Depth: 4   00:00:04
8...Qxf5 9.Qh6+ Kf6 10.Rf3 Qxf3
  ±  (1.27)   Depth: 4   00:00:04
8...Qxa2 9.Qh6+ Kf7 10.Qxg6+ Ke7 11.Ba5
  ±  (1.23)   Depth: 4   00:00:04
8...Qxa2 9.Qh6+ Kf7 10.Qxg6+ Ke7 11.Rh7+ Rf7 12.Rxf7+ Qxf7 13.Qxc6
  ±  (0.92)   Depth: 4   00:00:04
8...Qe8 9.Qh6+ Kf6 10.Bd8+ Nxd8 11.Rg3
  ±  (0.84)   Depth: 4   00:00:04
8...Qe8 9.fxg6 Rf4 10.Qh6+ Kf6
  ³  (-0.46)   Depth: 4   00:00:04
8...Qg8 9.Qh6+ Kf6 10.Qd2
  ³  (-0.48)   Depth: 4   00:00:04
8...Qg8 9.fxg6 Qd5 10.Qh7+ Kf6
  ³  (-0.56)   Depth: 4   00:00:04
8...Qg8 9.fxg6 Rxf2 10.Bxf2 Qxa2
  =  (-0.16)   Depth: 5   00:00:04  53kN
8...Qg8 9.fxg6 Bc1 10.Bc5 Rf6
  =  (0.06)   Depth: 5   00:00:04  58kN
8...Qe8 9.c4 Be7 10.Bc5
  =  (0.05)   Depth: 5   00:00:04  58kN
8...Qe8 9.fxg6 Rh8 10.Qxh8+ Qxh8 11.Rxh8
  =  (-0.07)   Depth: 5   00:00:05  58kN
8...Qe8 9.fxg6 Bc1 10.Qh7+ Kf6 11.Rf3+ Bf4 12.Bc5 Rh8
  =  (-0.16)   Depth: 6   00:00:05  242kN
8...Qe8 9.Qh7+ Kf6 10.fxg6 Bc1 11.Rf3+ Bf4 12.g3 Rh8 13.Qf7+ Qxf7
  =  (-0.01)   Depth: 7   00:00:07  914kN
8...Qg8 9.fxg6 Bc1 10.Qh7+ Kf6 11.Rf3+ Bf4 12.Qd7 Nb8 13.Qd6+ Kf5
  =  (-0.02)   Depth: 7   00:00:07  914kN
8...Qg8 9.fxg6 Bc1 10.a4 Qc4 11.axb5 Qxh4
  =  (-0.16)   Depth: 7   00:00:08  1319kN
8...Qg8 9.fxg6 Bc1 10.Rd3 Rf6 11.Rd7+ Rf7 12.gxf7 Qxf7
  =  (0.24)   Depth: 8   00:00:09  1720kN
8...Qg8 9.fxg6 Bc1 10.Qg4 Ne7 11.Bc5 Rf4 12.Rh8
  =  (0.24)   Depth: 8   00:00:11  2505kN
8...Qg8 9.fxg6 Bc1 10.Rd3 Qc4 11.Rd7+ Kxg6 12.Qh7+ Kf6 13.Rd6+ Kg5 14.h4+ Qxh4
15.Qxh4+ Kf5
  ²  (0.64)   Depth: 9   00:00:17  4853kN
8...Qg8 9.fxg6 Bc1 10.Rd3 Ba3 11.Rd7+ Ne7 12.Rxe7+ Bxe7 13.Qxe7+ Kxg6 14.c4 Qf7
  ±  (0.88)   Depth: 9   00:00:22  6948kN
8...Qe8 9.Qh6+ Kf6 10.fxg6 Ke7 11.Qg5+ Kd7 12.Rh7+ Ne7 13.g7 Rg8 14.Rh6
  ±  (0.87)   Depth: 9   00:00:39  13964kN
8...Qe8 9.Qh6+ Kf6 10.fxg6 Ke7 11.Qh7+ Kd6 12.g7 Ne7 13.gxf8Q Qxf8
  ±  (0.86)   Depth: 9   00:00:43  15559kN
8...Qe8 9.Qh6+ Kf6 10.fxg6 Ke7 11.Qh7+ Kd6 12.g7 Rg8 13.Rh6+ Kd5 14.Qd3+ Nd4
15.cxd4 exd4
  ±  (1.26)   Depth: 10   00:00:51  19020kN
8...Qe8 9.Qh6+ Kf6 10.fxg6 Ke7 11.Qh7+ Kd6 12.g7 Rg8 13.Rh6+ Ke7 14.Qf5 Qd7
15.Qf6+
  +-  (1.78)   Depth: 10   00:01:24  33362kN
8...Qg8 9.fxg6 Bc1 10.Rd3 Ba3 11.Rd7+ Ne7 12.Rxe7+ Bxe7 13.Qxe7+ Kxg6 14.c4 Qf7
15.g3
  +-  (1.77)   Depth: 10   00:01:35  38170kN
8...Qg8 9.fxg6 Bc1 10.Be3 Bxe3 11.fxe3 Rd8 12.Qh6+ Kf6 13.g7+ Ke7 14.Qxc6 Rd1+
15.Kf2 Qxa2+ 16.Kf3 Qf7+ 17.Ke2
  +-  (1.47)   Depth: 10   00:01:57  46367kN
8...Qg8 9.fxg6 Bc1 10.Be3 Bxe3 11.fxe3 Rd8 12.Qh6+ Kf6 13.g7+ Ke7 14.Qxc6 Rd1+
15.Kf2 Qxa2+ 16.Kg3 Qg8 17.Qb7+ Ke8
  +-  (1.66)   Depth: 11   00:04:48  111634kN
8...Qxf5 9.Qh7+ Kf6 10.Rf3 Qxf3 11.gxf3 Ne7 12.Qh4+ Ke6 13.Qg4+ Kd6 14.c4 Rf4
15.c5+ Bxc5 16.Bxc5+ Kxc5 17.Kg2
  +-  (1.65)   Depth: 11   00:11:05  256620kN
8...Qxf5 9.Qh6+ Kf7 10.Rf3 Qxf3 11.gxf3 Ne7 12.Qe3 Bd6 13.Qd3 Nc8 14.Qd5+ Kf6
15.h3
  +-  (1.59)   Depth: 11   00:11:22  263817kN
8...Qxf5 9.Qh7+ Kf6 10.Rf3 Qxf3 11.gxf3 Ne7 12.c4 Rb8 13.Qh4+ Ke6 14.Qg4+ Kf7
15.Bc7 Rc8 16.Bxe5 bxc4 17.Qg5
  +-  (1.69)   Depth: 12   00:13:31  315327kN

(Blass, Tel-aviv 05.03.2002)

yace learned from this analysis that 6...Kg7 is bad and prefers 6...Kf7

New position
[D]4qr2/8/pBn1bkp1/1p2pp2/4P2Q/bBP4R/P4PPP/6K1 b - - 0 1

Analysis by Yace 0.99.56:

6...Kf7 7.exf5 Bxb3 8.fxg6+ Ke6 9.Qg4+ Ke7 10.axb3 Rf6 11.g7 Rg6 12.Rh7 Kf6
  =  (0.07)   Depth: -1   00:00:04  1376kN
6...Kf7 7.exf5 Bxb3 8.fxg6+ Ke6 9.Qg4+ Ke7 10.axb3 Rg8 11.Rh7+ Kf6 12.Qf3+ Ke6
13.Rc7 Ne7
  =  (0.22)   Depth: -1   00:00:14  6133kN
6...Kf7 7.exf5 Bxb3 8.fxg6+ Ke6 9.Qg4+ Rf5 10.g7 Ne7 11.Rh6+ Kd7 12.axb3 Qf7
13.Qd1+ Kc8 14.Qd8+ Kb7
  =  (0.19)   Depth: -1   00:00:50  21058kN
6...Kf7 7.exf5 Bxb3 8.fxg6+ Ke6 9.Qg4+ Rf5 10.g7 Ne7 11.axb3 Ng8 12.Rf3 Qh5
13.Qxf5+ Qxf5 14.Rxf5 Kxf5
  ²  (0.41)   Depth: 11   00:02:51  72516kN
6...Kf7 7.exf5 Bxb3 8.fxg6+ Ke6 9.Qg4+ Kd6 10.axb3 Rg8 11.Rd3+ Ke7 12.g7 Kf6
13.Qh4+ Ke6 14.Qh6+ Kf5 15.Rf3+ Ke4 16.Qh7+ Kd5
  ²  (0.47)   Depth: 12   00:10:12  250295kN

(Blass, Tel-aviv 05.03.2002)


Yace can also learn the following 6...Kf7 is bad
and if I go forward and backward I get the following line:

New position
4qr2/5k2/pBn1b1p1/1p2pp2/4P2Q/bBP4R/P4PPP/6K1 w - - 0 1

Analysis by Yace 0.99.56:

7.Bxe6+ Kxe6 8.exf5+ gxf5
  -+  (-2.63)   Depth: 1   00:00:00
7.exf5 Bxb3 8.fxg6+ Ke6 9.Qg4+ Rf5 10.g7 Ne7 11.Rh6+ Kf7 12.Rh8 Be6 13.Rxe8 Kxe8
14.Qh3 Ng8 15.c4 Be7 16.cxb5 e4 17.f3 Re5
  ±  (0.87)   Depth: 1   00:00:00
7.exf5 Bxb3 8.fxg6+ Ke6 9.Qg4+ Rf5 10.g7 Ne7 11.Rh6+ Kf7 12.Rh8 Be6 13.Rxe8 Kxe8
14.Qh3 Ng8 15.c4 Be7 16.cxb5 e4 17.f3 Re5
  ±  (0.87)   Depth: 2   00:00:00
7.exf5 Bxb3 8.fxg6+ Ke6 9.Qg4+ Rf5 10.g7 Ne7 11.Rh6+ Kf7 12.Rh8 Be6 13.Rxe8 Kxe8
14.Qh3 Ng8 15.c4 Be7 16.cxb5 e4 17.f3 Re5
  ±  (0.87)   Depth: 3   00:00:00
7.exf5 Bxb3 8.fxg6+ Ke6 9.Qg4+ Rf5 10.g7 Ne7 11.Rh6+ Kf7 12.Rh8 Be6 13.Rxe8 Kxe8
14.Qh3 Ng8 15.c4 Be7 16.cxb5 e4 17.f3 Re5
  ±  (0.87)   Depth: 4   00:00:00
7.exf5 Bxb3 8.fxg6+ Ke6 9.Qg4+ Rf5 10.g7 Ne7 11.Rh6+ Kf7 12.Rh8 Be6 13.Rxe8 Kxe8
14.Qh3 Ng8 15.c4 Be7 16.cxb5 e4 17.f3 Re5
  ±  (0.87)   Depth: 5   00:00:00  13kN
7.exf5 Bxb3 8.fxg6+ Ke6 9.Qg4+ Rf5 10.g7 Ne7 11.Rh6+ Kf7 12.Rh8 Be6 13.Rxe8 Kxe8
14.Qh3 Ng8 15.c4 Be7 16.cxb5 e4 17.f3 Re5
  ±  (0.87)   Depth: 6   00:00:00  38kN
7.exf5 Bxb3 8.fxg6+ Ke6 9.Qg4+ Rf5 10.g7 Ne7 11.Rh6+ Kf7 12.Rh8 Be6 13.Rxe8 Kxe8
14.Qh3 Ng8 15.c4 Be7 16.cxb5 e4 17.f3 Re5
  ±  (0.87)   Depth: 7   00:00:00  236kN
7.exf5 Bxb3 8.fxg6+ Ke6 9.Qg4+ Rf5 10.g7 Ne7 11.Rh6+ Kf7 12.Rh8 Be6 13.Rxe8 Kxe8
14.Qh3 Ng8 15.c4 Be7 16.cxb5 e4 17.f3 Re5
  ±  (0.87)   Depth: 8   00:00:02  1147kN
7.exf5 Bxb3 8.fxg6+ Ke6 9.Qg4+ Rf5 10.g7 Ne7 11.Rh6+ Kf7 12.Rh8 Be6 13.Rxe8 Kxe8
14.Qh3 Ng8 15.c4 Be7 16.cxb5 e4 17.f3 Re5
  ±  (0.87)   Depth: 9   00:00:06  2856kN
7.exf5 Bxb3 8.fxg6+ Ke6 9.Qg4+ Rf5 10.g7 Ne7 11.Rh6+ Kf7 12.Rh8 Be6 13.Rxe8 Kxe8
14.Qh3 Ng8 15.c4 Be7 16.cxb5 e4 17.f3 Re5
  ±  (0.87)   Depth: 10   00:00:21  9657kN

(Blass, Tel-aviv 05.03.2002)

Yace can get the following conclusion

New position
4qrk1/5p2/pBn1b1pQ/1p2p3/4P3/bBPR4/P4PPP/6K1 b - - 0 1

Analysis by Yace 0.99.56:

3...Be7 4.Qxf8+ Bxf8 5.Rd8 Nxd8 6.Bxd8
  µ  (-1.10)   Depth: -1   00:00:00  59kN
3...Be7 4.Bxe6 fxe6 5.Be3 Rf6 6.f3
  -+  (-1.68)   Depth: -1   00:00:00  59kN
3...Be7 4.Bxe6 fxe6 5.Rh3 Rf7 6.Qxg6+ Rg7 7.Qxe8+ Bf8
  µ  (-1.28)   Depth: -1   00:00:00  59kN
3...Be7 4.Bxe6 fxe6 5.Rh3 Kf7 6.Rf3+ Kg8 7.Rh3 Kf7 8.Rf3+ Kg8
  =  (0.00)   Depth: -1   00:00:00  59kN
3...Ne7 4.Rd8 Qxd8 5.Bxd8 Rxd8 6.c4
  =  (-0.01)   Depth: -1   00:00:00  59kN
3...Ne7 4.Rd8 Qxd8 5.Bxd8 Rxd8 6.Qg5 Bxb3
  µ  (-1.33)   Depth: -1   00:00:00  59kN
3...Ne7 4.Bxe6 fxe6 5.Rh3 Rxf2 6.Bxf2 Nf5 7.exf5 gxf5
  µ  (-0.93)   Depth: -1   00:00:00  59kN
3...Ne7 4.Bxe6 fxe6 5.Rh3 Kf7 6.Qh7+ Kf6 7.Rf3+ Nf5 8.exf5 exf5 9.c4
  =  (0.06)   Depth: -1   00:00:00  59kN
3...Ne7 4.Bxe6 fxe6 5.Rh3 Kf7 6.Qh7+ Kf6 7.Rf3+ Nf5 8.exf5 exf5 9.Qh4+ g5 10.Qe4
  =  (0.03)   Depth: -1   00:00:01  446kN
3...Ne7 4.Bxe6 fxe6 5.c4 Bb2 6.Rh3 Kf7 7.Qh7+ Kf6 8.Rf3+ Nf5 9.exf5 exf5 10.c5
  =  (0.21)   Depth: -1   00:00:04  1742kN
3...Ne7 4.Bxe6 fxe6 5.c4 Bb2 6.Rh3 Kf7 7.Qh7+ Kf6 8.Rf3+ Nf5 9.exf5 exf5 10.Qh4+
Kf7 11.Rd3
  =  (0.24)   Depth: -1   00:00:12  5402kN
3...Ne7 4.Bc7 Nc6 5.Bxe6 fxe6 6.Rh3 Kf7 7.Qh7+ Kf6 8.Rf3+ Kg5 9.h4+ Kg4 10.Rg3+
Kf4 11.Qh6+ Kxe4 12.Qe3+ Kd5 13.Qd3+ Nd4 14.cxd4 Bc5 15.dxc5+ Kxc5
  ²  (0.64)   Depth: -1   00:00:38  15971kN
3...Ne7 4.Bc7 Bc1 5.Qxc1 Bxb3 6.axb3 Qc6 7.Bxe5 Qxe4 8.Re3 Qh4 9.c4 Rd8
  +-  (1.47)   Depth: -1   00:00:43  18021kN
3...Qe7 4.Bxe6 Qf6 5.Rh3 Qg7 6.Qh7+ Qxh7 7.Bxf7+ Rxf7 8.Bc5
  +-  (1.46)   Depth: -1   00:00:56  24155kN
3...Qe7 4.Bxe6 Qf6 5.Bb3 Qg7 6.Qd2 Re8 7.Rf3 Re7 8.Qd5 Na7
  +-  (1.41)   Depth: -1   00:01:07  28689kN
3...f5 4.Rh3 Kf7 5.Qh7+ Kf6 6.Qh4+ Kf7 7.exf5 Bxb3 8.fxg6+ Ke6 9.Qg4+ Rf5 10.g7
Ne7 11.Rh6+ Kf7 12.Rh8 Be6 13.Rxe8 Kxe8 14.Qh3 Ng8 15.c4
  ±  (0.87)   Depth: -1   00:01:15  31720kN
3...f5 4.Rh3 Kf7 5.Qh7+ Kf6 6.Qh4+ Kf7 7.exf5 Bxb3 8.fxg6+ Ke6 9.Qg4+ Rf5 10.g7
Ne7 11.Rh6+ Kf7 12.Rh8 Be6 13.Rxe8 Kxe8 14.Qh3 Ng8 15.c4
  ±  (0.87)   Depth: 12   00:01:41  42419kN

(Blass, Tel-aviv 05.03.2002)

and finally get the following analysis of the root position:

New position
2b1qrk1/5p1p/pBn3p1/1p2p3/4P2N/bBP1Q3/P4PPP/3R2K1 w - - 0 1

Analysis by Yace 0.99.56:

1.Nxg6 hxg6 2.Qh6 Be6 3.Rd3 f5 4.Rh3 Kf7 5.Qh7+ Kf6 6.Qh4+ Kf7 7.exf5 Bxb3
8.fxg6+ Ke6 9.Qg4+ Rf5 10.g7 Ne7 11.Rh6+ Kf7 12.Rh8 Be6 13.Rxe8 Kxe8 14.Qh3 Ng8
15.c4
  ±  (0.87)   Depth: 1   00:00:00
1.Nxg6 hxg6 2.Qh6 Be6 3.Rd3 f5 4.Rh3 Kf7 5.Qh7+ Kf6 6.Qh4+ Kf7 7.exf5 Bxb3
8.fxg6+ Ke6 9.Qg4+ Rf5 10.g7 Ne7 11.Rh6+ Kf7 12.Rh8 Be6 13.Rxe8 Kxe8 14.Qh3 Ng8
15.c4
  ±  (0.87)   Depth: 2   00:00:00
1.Nxg6 hxg6 2.Qh6 Be6 3.Rd3 f5 4.Rh3 Kf7 5.Qh7+ Kf6 6.Qh4+ Kf7 7.exf5 Bxb3
8.fxg6+ Ke6 9.Qg4+ Rf5 10.g7 Ne7 11.Rh6+ Kf7 12.Rh8 Be6 13.Rxe8 Kxe8 14.Qh3 Ng8
15.c4
  ±  (0.87)   Depth: 3   00:00:00
1.Nxg6 hxg6 2.Qh6 Be6 3.Rd3 f5 4.Rh3 Kf7 5.Qh7+ Kf6 6.Qh4+ Kf7 7.exf5 Bxb3
8.fxg6+ Ke6 9.Qg4+ Rf5 10.g7 Ne7 11.Rh6+ Kf7 12.Rh8 Be6 13.Rxe8 Kxe8 14.Qh3 Ng8
15.c4
  ±  (0.87)   Depth: 4   00:00:00
1.Nxg6 hxg6 2.Qh6 Be6 3.Rd3 f5 4.Rh3 Kf7 5.Qh7+ Kf6 6.Qh4+ Kf7 7.exf5 Bxb3
8.fxg6+ Ke6 9.Qg4+ Rf5 10.g7 Ne7 11.Rh6+ Kf7 12.Rh8 Be6 13.Rxe8 Kxe8 14.Qh3 Ng8
15.c4
  ±  (0.87)   Depth: 5   00:00:00  5kN
1.Nxg6 hxg6 2.Qh6 Be6 3.Rd3 f5 4.Rh3 Kf7 5.Qh7+ Kf6 6.Qh4+ Kf7 7.exf5 Bxb3
8.fxg6+ Ke6 9.Qg4+ Rf5 10.g7 Ne7 11.Rh6+ Kf7 12.Rh8 Be6 13.Rxe8 Kxe8 14.Qh3 Ng8
15.c4
  ±  (0.87)   Depth: 6   00:00:00  19kN
1.Nxg6 hxg6 2.Qh6 Be6 3.Rd3 f5 4.Rh3 Kf7 5.Qh7+ Kf6 6.Qh4+ Kf7 7.exf5 Bxb3
8.fxg6+ Ke6 9.Qg4+ Rf5 10.g7 Ne7 11.Rh6+ Kf7 12.Rh8 Be6 13.Rxe8 Kxe8 14.Qh3 Ng8
15.c4
  ±  (0.87)   Depth: 7   00:00:00  46kN
1.Nxg6 hxg6 2.Qh6 Be6 3.Rd3 f5 4.Rh3 Kf7 5.Qh7+ Kf6 6.Qh4+ Kf7 7.exf5 Bxb3
8.fxg6+ Ke6 9.Qg4+ Rf5 10.g7 Ne7 11.Rh6+ Kf7 12.Rh8 Be6 13.Rxe8 Kxe8 14.Qh3 Ng8
15.c4
  ±  (0.87)   Depth: 8   00:00:00  143kN
1.Nxg6 hxg6 2.Qh6 Be6 3.Rd3 f5 4.Rh3 Kf7 5.Qh7+ Kf6 6.Qh4+ Kf7 7.exf5 Bxb3
8.fxg6+ Ke6 9.Qg4+ Rf5 10.g7 Ne7 11.Rh6+ Kf7 12.Rh8 Be6 13.Rxe8 Kxe8 14.Qh3 Ng8
15.c4
  ±  (0.87)   Depth: 9   00:00:01  471kN
1.Nxg6 hxg6 2.Qh6 Be6 3.Rd3 f5 4.Rh3 Kf7 5.Qh7+ Kf6 6.Qh4+ Kf7 7.exf5 Bxb3
8.fxg6+ Ke6 9.Qg4+ Rf5 10.g7 Ne7 11.Rh6+ Kf7 12.Rh8 Be6 13.Rxe8 Kxe8 14.Qh3 Ng8
15.c4
  ±  (0.87)   Depth: 10   00:00:02  1271kN
1.Nxg6 hxg6 2.Qh6 Be6 3.Rd3 f5 4.Rh3 Kf7 5.Qh7+ Kf6 6.Qh4+ Kf7 7.exf5 Bxb3
8.fxg6+ Ke6 9.Qg4+ Rf5 10.g7 Ne7 11.Rh6+ Kf7 12.Rh8 Be6 13.Rxe8 Kxe8 14.Qh3 Ng8
15.c4
  ±  (0.87)  F…´{th: 11   00:00:09  3977kN

(Blass, Tel-aviv 05.03.2002)


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