Atak 6.5 queen sac

[Roman Hartmann]

Hi Graham,
I'm afraid the other two positions are just a little bit too hard for my engine. They are both not solved in several minutes.

best regards
Roman

[Graham Banks]

Hi Graham,
I'm afraid the other two positions are just a little bit too hard for my engine. They are both not solved in several minutes.

best regards
Roman

I'm sure that your engine will improve as you spend more time developing it, so stick at it
It's good to have three queen sacs of varying difficulties to try out.

Cheers, Graham.

[MattieShoes]

If you wanna feel good about your engine, just let it run through the WAC positions!

Code: Select all

Number of tests:                       300
Max score:                             300
Engines score:                         291

Woo hoo, it's a genius!

[rightrook]

One of my favorite engines...Ruffian 1.0.5.....less than one second...



Good test...!

Thanks!

[bob]

Seems it's not that hard to find as even my engine finds the move after a few seconds (at least the version I'm working on). In a 3+0 game it would miss the move though ...

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 D.   Time    Score  Best line
  1   0.00   -0.84   Nd2-f3 
  2   0.01   -0.44   f2-f3 qa5-c7 
  3   0.03   -0.80   Nd2-f1 nf6-e4 Bf5xe4 
  4   0.15   -0.41   Kh1-g2 qa5-c7 Kg2-f3 qc7-d8 
  5   0.63   -0.78   Nd2-f1 qa5-a6 Bf5-d3 qa6-a7 Nf1-e3 
  6   3.98   -0.42   Kh1-g2 qa5-c7 Kg2-f3 re8-d8 h2-h3 
  7   7.82    0.08   Qh4xf6 re7xe5 Qf6xf7 re5-e7 Qf7-g6 re7-e1+ Rg3-g1 
                     re1xg1+ Kh1xg1 
  8  21.77    1.05   Qh4xf6 re7xe5 Qf6xf7 re5-e1+ Kh1-g2 re1-e2 Qf7xb7 
                     re2xd2 Qb7xc6 
  9  56.51    1.91   Qh4xf6 re7xe5 Qf6xf7 re5xf5 Qf7xf5 qa5-d8 Qf5-g4 
                     qd8-e7 

best regards
Roman

Hi Roman (and Bob),

did you try the other two slightly more difficult ones also?

Cheers, Graham.

yes. First one:

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               15     1.35   0.68   1. Ba2 b4 2. axb4 Qxb4 3. Bc3 Qc5 4.
                                    Qf4 a3 5. b4 Qh5 6. Rh3 e5 7. Rxh5
                                    exf4 8. b5
               15     1.63     +1   1. Qxg7+!                         
               15     1.70     +3   1. Qxg7+!                         
               15     1.77     +M   1. Qxg7+!                         
               15     2.21  10.70   1. Qxg7+ Bxg7 2. Rg3 h6 3. Ree3 Kh8
                                    4. Rxg7 Rg8 5. Rxf7+ Rg7 6. Rxg7 Rf8
                                    7. Rxd7+ Rxf6 8. Rxb7 axb3 9. cxb3
                                    Rf8 10. Rxb5
               15->   2.22  10.70   1. Qxg7+ Bxg7 2. Rg3 h6 3. Ree3 Kh8
                                    4. Rxg7 Rg8 5. Rxf7+ Rg7 6. Rxg7 Rf8
                                    7. Rxd7+ Rxf6 8. Rxb7 axb3 9. cxb3
                                    Rf8 10. Rxb5 (s=2)
               16     2.30     +1   1. Qxg7+!                         

1.6 seconds to find the sac.

second one:

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               17     7.18  -3.92   1. ... Qd7 2. h3 Nf6 3. g4 Nxd5 4.    
                                    gxf5 Nxc3 5. bxc3 gxf5 6. Kf2 Rb6 7.
                                    Rb1 Re8 8. Rb3 Re4 9. Ke1 Kg7
               17    12.86     -1   1. ... Qe4!                           
               17    14.47     -3   1. ... Qe4!                           
               17    16.03  -6.01   1. ... Qe4 2. Bxe4 Rd1+ 3. Kg2 Bxe4+  
                                    4. Kh3 Nf2+ 5. Kh4 Rh1 6. Kg5 h6+ 7.
                                    Kxh6 f6 8. Qd5+ Kh8 9. f5 Rxh2+ 10.
                                    Kxg6 Bxd5 11. Rxc7 Rg8+ 12. Kxf6 Ng4+
                                    13. Ke7 Rh7+ 14. Kd6 Rd8+ 15. Kc5 Rxc7+
                                    16. Kxb5
               17->  16.03  -6.01   1. ... Qe4 2. Bxe4 Rd1+ 3. Kg2 Bxe4+  
                                    4. Kh3 Nf2+ 5. Kh4 Rh1 6. Kg5 h6+ 7.
                                    Kxh6 f6 8. Qd5+ Kh8 9. f5 Rxh2+ 10.
                                    Kxg6 Bxd5 11. Rxc7 Rg8+ 12. Kxf6 Ng4+
                                    13. Ke7 Rh7+ 14. Kd6 Rd8+ 15. Kc5 Rxc7+
                                    16. Kxb5 

just under 13 seconds to find Qe4