Code: Select all

```
Analysis from C:\test\WAC230.EPD
7/10/2009 8:06:22 PM Level: 3600 Seconds
Analyzing engine: CraftySMP
1) Rb4; id "WAC.230";
Searching move: Rb7-b4
Best move (CraftySMP): Rb7-b4
identical moves! Found in: 00:00
12 00:00 1.309.562 9.354.014 0.00 1. ... Rh7 2. Rb1 Kb5 3. Ba3 Rh5 4. f4 a4 5. Bb2 Bd7 6. Ba1 a3 7. Kg4 <HT>
12 00:00 1.324.010 3.677.805 -1.70 1. ... Rb4 2. cxb4 a4 3. Rb1 c3 4. Rc1 b2 5. Rxc3+ Kd7 6. Rc7+ Kd8 7. Ra7 b1=Q 8. Rxa4
12 00:00 3.899.320 10.831.444 -1.70 1. ... Rb4 2. cxb4 a4 3. Rb1 c3 4. Rc1 b2 5. Rxc3+ Kd7 6. Rc7+ Kd8 7. Ra7 b1=Q 8. Rxa4
13 00:00 6.216.277 11.100.494 -2.00 1. ... Rb4 2. cxb4 a4 3. Rb1 Kb5 4. Bc5 c3 5. Rc1 b2 6. Rxc3 b1=Q 7. Ra3 Kc4 8. Rxa4
13 00:00 7.079.876 11.062.306 -2.00 1. ... Rb4 2. cxb4 a4 3. Rb1 Kb5 4. Bc5 c3 5. Rc1 b2 6. Rxc3 b1=Q 7. Ra3 Kc4 8. Rxa4
14 00:00 9.500.690 11.047.313 -1.76 1. ... Rb4 2. cxb4 a4 3. Rb1 Kb5 4. Ra1 c3 5. Rc1 c2 6. Kf4 a3 7. f3 a2 8. Rxc2 a1=Q 9. Rxc8 Qxd4+
14 00:01 12.749.074 11.696.398 -1.76 1. ... Rb4 2. cxb4 a4 3. Rb1 Kb5 4. Ra1 c3 5. Rc1 c2 6. Kf4 a3 7. f3 a2 8. Rxc2 a1=Q 9. Rxc8 Qxd4+
15 00:01 18.900.899 11.887.357 -2.16 1. ... Rb4!!
15 00:02 25.623.315 12.811.657 -2.32 1. ... Rb4 2. cxb4 a4 3. b5+ Kxb5 4. Rc2 bxc2 5. Ba3 c3 6. Kf4 Kc4 7. Ke3 c1=Q+ 8. Bxc1 Kb3 9. Kf4 a3
15 00:02 28.875.793 14.437.896 -2.32 1. ... Rb4 2. cxb4 a4 3. b5+ Kxb5 4. Rc2 bxc2 5. Ba3 c3 6. Kf4 Kc4 7. Ke3 c1=Q+ 8. Bxc1 Kb3 9. Kf4 a3
16 00:03 37.873.722 12.624.574 -2.27 1. ... Rb4 2. cxb4 a4 3. b5+ Kxb5 4. Rc2 bxc2 5. Ba3 c3 6. Kf4 Kc4 7. Ke3 c1=Q+ 8. Bxc1 Kb3 9. Kf4 a3 10. Be3
16 00:04 51.677.782 12.919.445 -2.27 1. ... Rb4 2. cxb4 a4 3. b5+ Kxb5 4. Rc2 bxc2 5. Ba3 c3 6. Kf4 Kc4 7. Ke3 c1=Q+ 8. Bxc1 Kb3 9. Kf4 a3 10. Be3
17 00:05 75.484.013 12.580.668 -2.34 1. ... Rb4 2. cxb4 a4 3. b5+ Kxb5 4. Rc2 bxc2 5. Ba3 c3 6. Kf4 Kc4 7. Ke3 c1=Q+ 8. Bxc1 Kb3 9. Kf4 a3 10. Be3 Bd7
17 00:07 93.196.456 13.313.779 -2.34 1. ... Rb4 2. cxb4 a4 3. b5+ Kxb5 4. Rc2 bxc2 5. Ba3 c3 6. Kf4 Kc4 7. Ke3 c1=Q+ 8. Bxc1 Kb3 9. Kf4 a3 10. Be3 Bd7
18 00:21 263.576.580 12.551.265 -2.74 1. ... Rb4!!
18 00:34 422.594.741 12.429.257 -2.71 1. ... Rb4 2. Rb1 Ra4 3. Rc1 Kb5 4. Kf4 Ra2 5. Ke3 a4 6. f4 Bd7 7. Rh1 Rc2 8. Bb4 b2 9. Rb1 Bc6 <HT>
18 00:38 478.311.197 12.587.136 -2.71 1. ... Rb4 2. Rb1 Ra4 3. Rc1 Kb5 4. Kf4 Ra2 5. Ke3 a4 6. f4 Bd7 7. Rh1 Rc2 8. Bb4 b2 9. Rb1 Bc6 <HT>
19 00:51 634.009.656 12.431.561 -3.11 1. ... Rb4!!
19 01:23 1.034.971.693 12.469.538 -3.27 1. ... Rb4 2. Rb1 Ra4 3. Rc1 Kb5 4. Kf3 Ra2 5. Ke3 a4 6. f3 a3 7. Bb4 Ka4 8. Rb1 Rc2 9. Ra1 a2 10. Kf4 Kb5
19 01:31 1.135.277.436 12.475.576 -3.27 1. ... Rb4 2. Rb1 Ra4 3. Rc1 Kb5 4. Kf3 Ra2 5. Ke3 a4 6. f3 a3 7. Bb4 Ka4 8. Rb1 Rc2 9. Ra1 a2 10. Kf4 Kb5
20 02:14 1.662.136.918 12.404.006 -3.13 1. ... Rb4 2. Rb1 Ra4 3. Rc1 Kb5 4. Kf3 Ra2 5. Ke3 a4 6. Bb4 a3 7. Rh1 Ka4 8. Rh8 Ba6 9. Ra8 Kb5 10. Rb8+ Kc6 11. Ra8 Kb6
20 02:50 2.116.991.815 12.452.893 -3.13 1. ... Rb4 2. Rb1 Ra4 3. Rc1 Kb5 4. Kf3 Ra2 5. Ke3 a4 6. Bb4 a3 7. Rh1 Ka4 8. Rh8 Ba6 9. Ra8 Kb5 10. Rb8+ Kc6 11. Ra8 Kb6
21 04:34 3.346.270,630 12.189 -3.53 1. ... Rb4!!
21 09:40 6.866.280,070 11.815 -4.26 1. ... Rb4 2. cxb4 a4 3. b5+ Kxb5 4. Ba3 c3 5. Rb1 Kc4 6. Kf4 Kxd4 7. Rh1 Kd3 8. Rh7 b2 9. Rh1 <HT>
21 10:53 7.803.996,586 11.933 -4.26 1. ... Rb4 2. cxb4 a4 3. b5+ Kxb5 4. Ba3 c3 5. Rb1 Kc4 6. Kf4 Kxd4 7. Rh1 Kd3 8. Rh7 b2 9. Rh1 <HT>
22 17:26 12.414.409,879 11.858 -4.50 1. ... Rb4 2. cxb4 a4 3. b5+ Kxb5 4. Ba3 c3 5. Re2 Kc4 6. f4 Kxd4 7. f5 exf5 8. e6 Kc4 9. Re5 b2 10. e7 Bd7 11. Re1 d4 12. Bxb2 cxb2
22 21:52 15.801.615,065 12.038 -4.50 1. ... Rb4 2. cxb4 a4 3. b5+ Kxb5 4. Ba3 c3 5. Re2 Kc4 6. f4 Kxd4 7. f5 exf5 8. e6 Kc4 9. Re5 b2 10. e7 Bd7 11. Re1 d4 12. Bxb2 cxb2
23 36:36 26.407.851,901 12.025 -4.30 1. ... Rb4 2. cxb4 a4 3. b5+ Kxb5 4. Ba3 c3 5. Re2 Kc4 6. f4 Kxd4 7. f5 exf5 8. e6 Kc4 9. Re5 b2 10. e7 Bd7 11. Re1 d4 12. Bxb2 cxb2 13. Kf4
23 56:28 41.449.515,645 12.234 -4.30 1. ... Rb4 2. cxb4 a4 3. b5+ Kxb5 4. Ba3 c3 5. Re2 Kc4 6. f4 Kxd4 7. f5 exf5 8. e6 Kc4 9. Re5 b2 10. e7 Bd7 11. Re1 d4 12. Bxb2 cxb2 13. Kf4
```

Code: Select all

```
.. Rb4!? 2. cxb4 a4 3. b5+ Kxb5 4. Ba3 c3 5. Re2! Kc4 6. f4 Kxd4 7. f5 exf5 8. e6 Kd3 9. e7 Bd7 10. Kf3 d4 11. Rh2 Kc4 12. Rh8 b2 13. Rb8 d3 14. Bxb2 cxb2 15. Rxb2 a3 16. Rb7 Be8 17. Ra7 Kb3 18. Ke3 a2 19. Kxd3 Kb2 20. Rb7+ Kc1 21. Ra7
```

Question, can any engine other than Crafty 20.10 find this line and if so, can any engine also come up with a draw score due to white's passed pawn (I do see that Crafty's score has just stared to drop).

For reference, here is some previous WAC.230 analysis form a CCC of yesteryear:

================================================================================

Code: Select all

```
Author: Alex Szabo
Date: 20:37:36 07/08/02
Go up one level in this thread
--------------------------------------------------------------------------------
On July 08, 2002 at 13:58:27, Miguel A. Ballicora wrote:
>On July 07, 2002 at 15:39:04, Steve Maughan wrote:
>
>>Mike,
>>
>>Is WAC 230 correct? If I remember corretly there was a discussion here a few
>>months back that said that Rb4 was not such a forced win e.g.
>>
>>http://www.it.ro/ccc_search/ccc.php?art_id=163138
>>
>>Regards,
>>
>>Steve
>
>I still think that WAC230 is a win for black. I did not have time to do an
>analysis and _prove_ it but my intuition tells me so.
>I reproduce the post and answer later.
>
>Subject : WAC 230
>
>----------------------------------------------------------------------------
>Posted by : Bruce Moreland on April 13, 2001 at 04:14:13
>
>This is from a post by Alex Szabo.
>
>#230 [Rb4 does not win. The main line is, 1... Rb4!? 2. cxb4 a4
>3. b5+ Kxb5 4. Ba3 c3 5. Re2! Kc4 6. f4 Kxd4 7. f5 exf5 8. e6 Kd3
>9. e7 Bd7 10. Kf3 d4 11. Rh2 Kc4 12. Rh8 b2 13. Rb8 d3
>14. Bxb2 cxb2 15. Rxb2 a3 16. Rb7 Be8 17. Ra7 Kb3 18. Ke3 a2
>19. Kxd3 Kb2 20. Rb7+ Kc1 21. Ra7 =]
>
>Ra7, Rb6, Rb5, Rd7, Rf7, Rg7, Rh7, Bd7, Kd7, Kb6, Kb5, a4, and Rc7
>are just as good as the book solution Rb4 -- they all hold the game.
>
>[D]2b5/1r6/2kBp1p1/p2pP1P1/2pP4/1pP3K1/1R3P2/8 b - - 0 1
>
>I think this is worth thinking about. After 1. ... Rb4 2. cxb4 a5 3. b5+ Kxb5
>4. Ba3 c3 5. Re2 Kc4 6. f4, we get this:
>
>[D]2b5/8/4p1p1/3pP1P1/p1kP1P2/Bpp3K1/4R3/8 b - - 0 1
>
>6. ... Bd7 is a possibility, but still seems like a draw.
>
>There is some fascinating stuff going on in the main line.
>
>WAC attributes this to Nimzovich, but doesn't give a game reference.
>
>I doubt that the position is solvable by a computer, and if anyone "finds" this,
>they've got some lucky eval terms.
>
>bruce
>-------------------------------------------------------------------------------
>
>The position is from the book "my system", so it is well known from there, not
>from WAC.
>
>IIRC when I looked to this analysis, 6... Bd7 wins. I am "remembering"
>blindfold, so beware. For instance, you can answer 7.f5 with Be8. There is no
>need to give counterchances to white on the king side. Why doing it? White is
>lost in the queen side. One thing is certain, Szabo's move 5. Re2! I is much
>stronger than the "classical" PV (that came from the Nimzovich game).
>
>Regards,
>Miguel
>
>
>> ...
I don't see a win for Black after 6... Bd7. The best line I can find is: 6...
Bd7 7. f5 Be8!? 8. fxe6 Kxd4 9. e7 Kc4 10. Kf4 d4 11. Rh2 d3 12. Rh8 b2
13. Rxe8 b1=Q 14. Rf8 Rc8+ =. Please let me know if Black's play can be
improved!
Alex.
```