What engine can see the best move Bf8+!

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BubbaTough
Posts: 1154
Joined: Fri Jun 23, 2006 3:18 am

Re: What engine can see the best move Bf8+!

Post by BubbaTough » Thu Apr 12, 2012 12:44 am

pichy wrote:
BubbaTough wrote:
pichy wrote: Will your next version of Hannibal be able to find it, by fixing the Null Moves heuristic?
I haven't tried it with my development version, but I doubt it gets it, and it is probably not that far from release, maybe a couple of months. Its one of those positions that sadly the programmer is still better at than the program.

I am playing with null move a little right now in fact, but experience indicates I am unlikely to get away with changing it dramatically without weakening the engine.

-Sam
I don't believe that Null Move will weakening your engine since the best engines Houdini and Critter are benefitting from using it :wink:
I use null move :). And I use whatever version works best for me (not sure how it differs from Houdini and Critter, but assumably it does). If I found a solution that worked better, I would happily use it. My guess is, if someone sent me the source for Houdini and Critter, and I tried their exact version of null move, it would actually make my engine worse (and vice-versa). Chess programming is funny that way.

-Sam

pichy
Posts: 2564
Joined: Thu Mar 09, 2006 2:04 am

Re: What engine can see the best move Bf8+!

Post by pichy » Thu Apr 12, 2012 1:33 am

BubbaTough wrote:
pichy wrote:
BubbaTough wrote:
pichy wrote: Will your next version of Hannibal be able to find it, by fixing the Null Moves heuristic?
I haven't tried it with my development version, but I doubt it gets it, and it is probably not that far from release, maybe a couple of months. Its one of those positions that sadly the programmer is still better at than the program.

I am playing with null move a little right now in fact, but experience indicates I am unlikely to get away with changing it dramatically without weakening the engine.

-Sam
I don't believe that Null Move will weakening your engine since the best engines Houdini and Critter are benefitting from using it :wink:
I use null move :). And I use whatever version works best for me (not sure how it differs from Houdini and Critter, but assumably it does). If I found a solution that worked better, I would happily use it. My guess is, if someone sent me the source for Houdini and Critter, and I tried their exact version of null move, it would actually make my engine worse (and vice-versa). Chess programming is funny that way.

-Sam
Don't feel bad, even one of the oldest program around Crafty can not solve this puzzle :roll:


FEN: 6R1/8/2pB3k/2P4p/5p1q/5P2/4P1K1/8 w - - 0 1

Crafty-23.4-win32:
11 00:00 250.064 2.273.309 -1.27 1. Rf8 Qe1 2. Bxf4+ Kg7 3. Re8 Kf7 4. Re4 h4 5. Bd6 Kg6 6. Rg4+ Kf6 7. e4
11 00:00 273.962 2.283.016 -1.27 1. Rf8 Qe1 2. Bxf4+ Kg7 3. Re8 Kf7 4. Re4 h4 5. Bd6 Kg6 6. Rg4+ Kf6 7. e4
12 00:00 458.893 2.294.465 -1.28 1. Rf8 Qe1 2. Bxf4+ Kg7 3. Re8 Kf7 4. Re4 Kf6 5. Bd6 Qd2 6. Rf4+ Kg6 7. Re4 Qg5+ 8. Kf2
12 00:00 513.652 2.233.269 -1.28 1. Rf8 Qe1 2. Bxf4+ Kg7 3. Re8 Kf7 4. Re4 Kf6 5. Bd6 Qd2 6. Rf4+ Kg6 7. Re4 Qg5+ 8. Kf2
13 00:00 732.308 2.153.847 -1.23 1. Rf8 Qe1 2. Bxf4+ Kg7 3. Re8 Kf7 4. Re4 Kf6 5. Bd6 Qd2 6. Rf4+ Kg5 7. Re4 Kf5 8. Re5+ Kg6
13 00:00 781.788 2.171.633 -1.23 1. Rf8 Qe1 2. Bxf4+ Kg7 3. Re8 Kf7 4. Re4 Kf6 5. Bd6 Qd2 6. Rf4+ Kg5 7. Re4 Kf5 8. Re5+ Kg6
14 00:00 1.198.153 2.065.781 -1.20 1. Rf8 Qe1 2. Bxf4+ Kg7 3. Re8 Kf7 4. Re4 Kf6 5. Bd6 Qd2 6. Rf4+ Kg5 7. Re4 Qc2 8. Re5+ Kf6 9. Re7
14 00:00 1.321.721 2.131.808 -1.20 1. Rf8 Qe1 2. Bxf4+ Kg7 3. Re8 Kf7 4. Re4 Kf6 5. Bd6 Qd2 6. Rf4+ Kg5 7. Re4 Qc2 8. Re5+ Kf6 9. Re7
15 00:01 3.307.933 2.054.616 -1.03 1. Rf8 Qe1 2. Bxf4+ Kg7 3. Re8 Kf7 4. Re4 Qd1 5. Bd6 Qd2 6. Re7+ Kf6 7. Kg3 Qe1+ 8. Kg2 h4 9. e4 Qe3
15 00:01 3.446.942 2.064.037 -1.03 1. Rf8 Qe1 2. Bxf4+ Kg7 3. Re8 Kf7 4. Re4 Qd1 5. Bd6 Qd2 6. Re7+ Kf6 7. Kg3 Qe1+ 8. Kg2 h4 9. e4 Qe3
16 00:02 4.697.993 2.078.757 -1.03 1. Rf8 Qe1 2. Bxf4+ Kg7 3. Re8 h4 4. Re7+ Kf6 5. Bd6 Kg5 6. Rg7+ Kh6 7. Re7 Kh5 8. Rh7+ Kg6 9. Re7 Qd2 10. Kh3 Qd4
16 00:02 5.040.466 2.108.981 -1.03 1. Rf8 Qe1 2. Bxf4+ Kg7 3. Re8 h4 4. Re7+ Kf6 5. Bd6 Kg5 6. Rg7+ Kh6 7. Re7 Kh5 8. Rh7+ Kg6 9. Re7 Qd2 10. Kh3 Qd4
17 00:04 9.351.314 1.998.144 -0.97 1. Rf8 Qe1 2. Bxf4+ Kg7 3. Re8 h4 4. Re7+ Kf6 5. Bd6 Kg5 6. Rg7+ Kh6 7. Re7 Kh5 8. Rh7+ Kg6 9. Re7 Kf5 10. e4+ Kf6 11. Kh3 Qh1+ 12. Kg4
17 00:04 9.757.546 2.084.945 -0.97 1. Rf8 Qe1 2. Bxf4+ Kg7 3. Re8 h4 4. Re7+ Kf6 5. Bd6 Kg5 6. Rg7+ Kh6 7. Re7 Kh5 8. Rh7+ Kg6 9. Re7 Kf5 10. e4+ Kf6 11. Kh3 Qh1+ 12. Kg4
18 00:11 22.506.447 2.046.040 -0.91 1. Rf8 Qg3+ 2. Kf1 Qh3+ 3. Kf2 Qh2+ 4. Kf1 Qh1+ 5. Kf2 Qa1 6. Bxf4+ Kg6 7. e4 Qa3 8. Be3 Qb2+ 9. Kg3 Qe5+ 10. Kf2 h4 11. Rd8 h3 12. Rd6+ Kf7 13. Rxc6 h2
18 00:11 23.428.339 2.129.849 -0.91 1. Rf8 Qg3+ 2. Kf1 Qh3+ 3. Kf2 Qh2+ 4. Kf1 Qh1+ 5. Kf2 Qa1 6. Bxf4+ Kg6 7. e4 Qa3 8. Be3 Qb2+ 9. Kg3 Qe5+ 10. Kf2 h4 11. Rd8 h3 12. Rd6+ Kf7 13. Rxc6 h2
19 00:18 37.502.177 2.083.454 -0.79 1. Rf8 Qg3+ 2. Kf1 Qh3+ 3. Kf2 Qh2+ 4. Kf1 Qh1+ 5. Kf2 Qb1 6. Rxf4 Qa2 7. Rb4 Kg5 8. Rb6 Qa4 9. e4 h4 10. Be7+ Kh5 11. Bd6 Qc2+ 12. Ke3 Qc3+ 13. Kf4 Qf6+ 14. Ke3
19 00:19 39.085.230 2.057.117 -0.79 1. Rf8 Qg3+ 2. Kf1 Qh3+ 3. Kf2 Qh2+ 4. Kf1 Qh1+ 5. Kf2 Qb1 6. Rxf4 Qa2 7. Rb4 Kg5 8. Rb6 Qa4 9. e4 h4 10. Be7+ Kh5 11. Bd6 Qc2+ 12. Ke3 Qc3+ 13. Kf4 Qf6+ 14. Ke3
20 00:36 72.340.808 2.009.466 -0.77 1. Rf8 Qg3+ 2. Kf1 Qh3+ 3. Kf2 Qh2+ 4. Kf1 Qh1+ 5. Kf2 Qb1 6. Rxf4 Qa2 7. Rb4 Kg5 8. Rb6 Qa4 9. Be7+ Kf5 10. e4+ Ke6 11. Rb7 Qa8 12. Rc7 Qa2+ 13. Kg3 Qb1 14. Bd6
20 00:37 74.726.866 2.019.645 -0.77 1. Rf8 Qg3+ 2. Kf1 Qh3+ 3. Kf2 Qh2+ 4. Kf1 Qh1+ 5. Kf2 Qb1 6. Rxf4 Qa2 7. Rb4 Kg5 8. Rb6 Qa4 9. Be7+ Kf5 10. e4+ Ke6 11. Rb7 Qa8 12. Rc7 Qa2+ 13. Kg3 Qb1 14. Bd6
21 01:02 124.798.167 2.012.873 -0.76 1. Rf8 Qg3+ 2. Kf1 Qh3+ 3. Kf2 Qh2+ 4. Kf1 Qh1+ 5. Kf2 Qb1 6. Rxf4 Qa2 7. Re4 Kg6 8. Re7 Qd5 9. e4 Qd2+ 10. Kg3 Qe1+ 11. Kg2 h4 12. Re8 Kg5 13. f4+ Kf6 14. e5+ Kf5 15. Rf8+ Ke4
21 01:05 131.463.264 2.022.511 -0.76 1. Rf8 Qg3+ 2. Kf1 Qh3+ 3. Kf2 Qh2+ 4. Kf1 Qh1+ 5. Kf2 Qb1 6. Rxf4 Qa2 7. Re4 Kg6 8. Re7 Qd5 9. e4 Qd2+ 10. Kg3 Qe1+ 11. Kg2 h4 12. Re8 Kg5 13. f4+ Kf6 14. e5+ Kf5 15. Rf8+ Ke4
22 02:31 303.708.818 2.011.316 -0.71 1. Rf8 Qg3+ 2. Kf1 Qh3+ 3. Kf2 Qh2+ 4. Kf1 Qh1+ 5. Kf2 Qd1 6. Rxf4 Kg5 7. e4 Qd2+ 8. Kg3 Qe1+ 9. Kg2 Qe2+ 10. Kh3 Qf1+ 11. Kh2 h4 12. Rg4+ Kf6 13. f4 Qe2+ 14. Kh3 Qxe4 15. Kxh4 Qe1+ 16. Kh3 Qf2 17. Be5+ Kf5 18. Rg5+ Ke4
22 02:38 317.234.104 2.007.810 -0.71 1. Rf8 Qg3+ 2. Kf1 Qh3+ 3. Kf2 Qh2+ 4. Kf1 Qh1+ 5. Kf2 Qd1 6. Rxf4 Kg5 7. e4 Qd2+ 8. Kg3 Qe1+ 9. Kg2 Qe2+ 10. Kh3 Qf1+ 11. Kh2 h4 12. Rg4+ Kf6 13. f4 Qe2+ 14. Kh3 Qxe4 15. Kxh4 Qe1+ 16. Kh3 Qf2 17. Be5+ Kf5 18. Rg5+ Ke4
23 05:28 651.624.307 1.986.659 -0.67 1. Rf8 Qg3+ 2. Kf1 Qh3+ 3. Kf2 Qh2+ 4. Kf1 Qh1+ 5. Kf2 Qb1 6. Rxf4 Qa2 7. Bf8+ Kg5 8. Bd6 Kg6 9. Rf8 Qe6 10. e4 h4 11. Kg2 Qa2+ 12. Kh3 Qf2 13. Rg8+ Kf7 14. Rf8+ Ke6 15. Re8+ Kf6 16. Rf8+ Kg6 17. Re8 Kf7 18. Re7+ Kf6 19. Kg4 Kg6 20. Rd7
23 05:41 678.143.449 1.988.690 -0.67 1. Rf8 Qg3+ 2. Kf1 Qh3+ 3. Kf2 Qh2+ 4. Kf1 Qh1+ 5. Kf2 Qb1 6. Rxf4 Qa2 7. Bf8+ Kg5 8. Bd6 Kg6 9. Rf8 Qe6 10. e4 h4 11. Kg2 Qa2+ 12. Kh3 Qf2 13. Rg8+ Kf7 14. Rf8+ Ke6 15. Re8+ Kf6 16. Rf8+ Kg6 17. Re8 Kf7 18. Re7+ Kf6 19. Kg4 Kg6 20. Rd7

Uri
Posts: 423
Joined: Thu Dec 27, 2007 8:34 pm

Re: What engine can see the best move Bf8+!

Post by Uri » Thu Apr 12, 2012 1:56 am

Houdini wrote:How many human players would find a win in this position in less than a minute?
I would say the best players like Kasparov, Anand, Carlsen, Aronian and Gelfand and Kramnik would find it in less than a second. I'm sure the powerful Lukas Cimiotti cluster can see it as well, in less than a second.

I couldn't see it but then again I'm am a pretty crappy chess player.

pichy
Posts: 2564
Joined: Thu Mar 09, 2006 2:04 am

Re: What engine can see the best move Bf8+!

Post by pichy » Thu Apr 12, 2012 2:12 am

Uri wrote:
Houdini wrote:How many human players would find a win in this position in less than a minute?
I would say the best players like Kasparov, Anand, Carlsen, Aronian and Gelfand and Kramnik would find it in less than a second. I'm sure the powerful Lukas Cimiotti cluster can see it as well, in less than a second.

I couldn't see it but then again I'm not a good chess player.
In order for engines to see it, Null Move pruning heuristic has to be implemented which was first proposed by Donninger in 1993; but humans have been using this in their computer (Internal Brain) for many years as an elimination process :wink:

ernest
Posts: 1864
Joined: Wed Mar 08, 2006 7:30 pm

Re: What engine can see the best move Bf8+!

Post by ernest » Thu Apr 12, 2012 7:54 am

Uri wrote: I'm sure the powerful Lukas Cimiotti cluster can see it as well, in less than a second.
Well DeepRybka 4.1 still doesn't get it at depth 35...

Uri
Posts: 423
Joined: Thu Dec 27, 2007 8:34 pm

Re: What engine can see the best move Bf8+!

Post by Uri » Thu Apr 12, 2012 8:05 am

ernest wrote:Well DeepRybka 4.1 still doesn't get it at depth 35...
Deep Rybka 4.1 is a very inferior engine compared to what Vas is working with right now.

pichy
Posts: 2564
Joined: Thu Mar 09, 2006 2:04 am

Re: What engine can see the best move Bf8+!

Post by pichy » Thu Apr 12, 2012 12:20 pm

ernest wrote:
Uri wrote: I'm sure the powerful Lukas Cimiotti cluster can see it as well, in less than a second.
Well DeepRybka 4.1 still doesn't get it at depth 35...
Let your system run for 2 hours and I am pretty sure that Lukas Cimiotti Clusters can not match the amount of search that your system get in in 2 hours in 5 seconds or even 30 seconds :lol:

Uri
Posts: 423
Joined: Thu Dec 27, 2007 8:34 pm

Re: What engine can see the best move Bf8+!

Post by Uri » Thu Apr 12, 2012 1:24 pm

pichy wrote:Let your system run for 2 hours and I am pretty sure that Lukas Cimiotti Clusters can not match the amount of search that your system get in in 2 hours in 5 seconds or even 30 seconds :lol:
Yes but computers are always getting better and faster so they can check up many more promising positions on the board and can see farther and farther ahead.

Some day the chess community may have access to an exascale computer system like the Square Kilometer Array (SKA) that is under development.

http://www.popsci.com/technology/articl ... -computing

pichy
Posts: 2564
Joined: Thu Mar 09, 2006 2:04 am

Re: What engine can see the best move Bf8+!

Post by pichy » Thu Apr 12, 2012 2:58 pm

Uri wrote:
pichy wrote:Let your system run for 2 hours and I am pretty sure that Lukas Cimiotti Clusters can not match the amount of search that your system get in in 2 hours in 5 seconds or even 30 seconds :lol:
Yes but computers are always getting better and faster so they can check up many more promising positions on the board and can see farther and farther ahead.

Some day the chess community may have access to an exascale computer system like the Square Kilometer Array (SKA) that is under development.

http://www.popsci.com/technology/articl ... -computing
Lets get back into the present if Komodo and many other top programs can not find the correct move after searching up to depth 34 which on my slow computer is equivalent to letting it run for over 1 hour and thirty minutes then in an actual game it will never find it within reasonable time, but I provide an old version of Houdini 3 minutes which is reasonable and it found the correct move after 20 seconds :wink:


FEN: 6R1/8/2pB3k/2P4p/5p1q/5P2/4P1K1/8 w - - 0 1

Komodo-10-32-ja:
fen = 6R1/8/2pB3k/2P4p/5p1q/5P2/4P1K1/ w - -
1 00:00 252 0 -0.41 Bd6e5
2 00:00 442 0 -0.18 Bd6e5 Kh6h7
3 00:00 778 0 -0.30 Bd6e5 Kh6h7 Rg8g7+ Kh7h6
4 00:00 1.928 123.588 -0.46 Bd6e5 Qh4e7 Be5xf4+ Kh6h7 Rg8a8 Qe7xe2+ Kg2g3
5 00:00 2.283 146.344 -0.44 Bd6e5 Qh4e7 Be5xf4+ Kh6h7 Rg8a8 Qe7xe2+ Kg2g3
5 00:00 2.873 184.164 -0.44 Bd6e5 Qh4e7 Be5xf4+ Kh6h7 Rg8a8 Qe7xe2+ Kg2g3
6 00:00 3.961 253.906 -0.54 Bd6e5 Qh4e7 Be5xf4+ Kh6h7 Rg8a8 Qe7xe2+ Kg2g3 Kh7g6 Ra8g8+ Kg6f5
6 00:00 9.377 601.081 -0.54 Bd6e5 Qh4e7 Be5xf4+ Kh6h7 Rg8a8 Qe7xe2+ Kg2g3 Kh7g6 Ra8g8+ Kg6f5
7 00:00 13.654 437.622 -0.66 Bd6e5 Qh4e7 Be5xf4+ Kh6h7 Rg8a8 Qe7xe2+ Kg2g3 Qe2e7 Bf4d6 h5h4+ Kg3g4
7 00:00 23.156 494.779 -0.19 Rg8f8 Qh4g3+ Kg2f1 Qg3g7 Bd6xf4+ Kh6g6 Rf8d8 Kg6f5 Bf4d2
7 00:00 23.890 510.463 -0.19 Rg8f8 Qh4g3+ Kg2f1 Qg3g7 Bd6xf4+ Kh6g6 Rf8d8 Kg6f5 Bf4d2
8 00:00 41.839 536.390 -0.15 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 Qe1c3 Re8g8+ Kg6f7 Rg8g5 h5h4
8 00:00 44.170 566.274 -0.15 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 Qe1c3 Re8g8+ Kg6f7 Rg8g5 h5h4
9 00:00 81.536 653.334 -0.08 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 Qe1c3 Re8g8+ Kg6f5 Rg8f8+ Kf5e6 Rf8e8+ Ke6f7 Re8e5
9 00:00 83.958 672.741 -0.08 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 Qe1c3 Re8g8+ Kg6f5 Rg8f8+ Kf5e6 Rf8e8+ Ke6f7 Re8e5
10 00:00 159.774 731.562 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 Qe1c3 Bf4d6 Qc3e1 Re8g8+ Kg6h7 Rg8e8 Kh7g6
10 00:00 164.888 754.978 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 Qe1c3 Bf4d6 Qc3e1 Re8g8+ Kg6h7 Rg8e8 Kh7g6
11 00:00 216.607 771.392 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 Qe1c3 Bf4d6 Qc3e1 Re8g8+ Kg6h7 Rg8e8 Kh7g6
11 00:00 223.495 754.031 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 Qe1c3 Bf4d6 Qc3e1 Re8g8+ Kg6h7 Rg8e8 Kh7g6
12 00:00 349.272 799.615 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 Qe1c3 Bf4d6 Qc3e1 Re8g8+ Kg6h7 Rg8e8 Kh7g6
12 00:00 360.438 796.723 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 Qe1c3 Bf4d6 Qc3e1 Re8g8+ Kg6h7 Rg8e8 Kh7g6
13 00:00 527.163 824.206 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 Qe1c3 Bf4d6 Qc3e1 Re8g8+ Kg6h7 Rg8e8 Kh7g6
13 00:00 545.072 831.915 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 Qe1c3 Bf4d6 Qc3e1 Re8g8+ Kg6h7 Rg8e8 Kh7g6
14 00:00 723.537 843.281 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 Qe1c3 Bf4d6 Qc3e1 Re8g8+ Kg6h7 Rg8e8 Kh7g6
14 00:00 754.287 848.273 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 Qe1c3 Bf4d6 Qc3e1 Re8g8+ Kg6h7 Rg8e8 Kh7g6
15 00:01 1.022.140 862.127 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 Qe1c3 Bf4d6 Qc3e1 Re8g8+ Kg6h7 Rg8e8 Kh7g6
15 00:01 1.066.127 865.079 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 Qe1c3 Bf4d6 Qc3e1 Re8g8+ Kg6h7 Rg8e8 Kh7g6
16 00:01 1.429.480 881.088 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 Qe1c3 Bf4d6 Qc3e1 Re8g8+ Kg6h7 Rg8e8 Kh7g6
16 00:01 1.498.912 881.503 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 Qe1c3 Bf4d6 Qc3e1 Re8g8+ Kg6h7 Rg8e8 Kh7g6
17 00:02 2.433.283 896.433 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 Qe1c3 Bf4d6 Qc3e1 Re8g8+ Kg6h7 Rg8e8 Kh7g6
17 00:02 2.546.192 901.752 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 Qe1c3 Bf4d6 Qc3e1 Re8g8+ Kg6h7 Rg8e8 Kh7g6
18 00:06 5.711.555 915.311 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4
18 00:06 5.874.685 918.491 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4
19 00:07 7.117.602 921.728 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4
19 00:08 7.379.193 925.683 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4
20 00:09 8.738.312 930.477 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4
20 00:09 9.202.111 931.876 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4
21 00:12 11.444.830 941.773 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4
21 00:12 11.845.260 945.591 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4
22 00:16 15.582.752 952.233 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4
22 00:17 16.335.813 956.315 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4
23 00:22 21.444.158 961.274 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4
23 00:23 22.477.862 966.389 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4
24 00:34 32.815.079 957.454 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4
24 00:36 34.560.598 960.303 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4
25 01:04 60.504.022 945.734 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4
25 01:06 62.769.574 948.981 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4
26 01:30 85.926.144 949.013 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4
26 01:33 88.817.349 951.756 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4
27 02:08 121.217.531 944.148 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4
27 02:13 125.959.686 946.468 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4
28 03:05 175.164.211 942.676 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4
28 03:13 182.524.334 944.845 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4
29 04:41 266.409.051 945.583 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4
29 04:52 276.598.287 946.732 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4
30 08:17 459.517.962 923.125 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4
30 08:36 477.690.051 924.543 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4
31 13:40 750.168.373 914.156 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4
31 14:14 781.697.300 914.971 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4
32 22:39 1.226.496.728 901.960 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4
32 23:25 1.269.566.050 903.331 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4
33 44:03 2.384.953,853 902.177 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4
33 45:43 2.476.339,029 902.764 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4
34 1:37:26 5.208.430,570 890.823 0.00 Rg8f8 Qh4e1 Bd6xf4+ Kh6g6 Rf8e8 h5h4 Kg2h3 Qe1h1+ Bf4h2 Qh1e1 Bh2f4

FEN: 6R1/8/2pB3k/2P4p/5p1q/5P2/4P1K1/8 w - - 0 1

Houdini_15_w32:
4/14 00:00 1,066 1,066,000 -0.38 Bd6-f8+ Kh6-h7 Rg8-g7+ Kh7-h8 Bf8-e7 Qh4-e1
5/16 00:00 2,117 1,058,000 -0.57 Bd6-f8+ Kh6-h7 Rg8-g7+ Kh7-h8 Rg7-g6 Qh4-e1 Bf8-g7+ Kh8-h7
5/16 00:00 2,786 928,000 -0.33 Rg8-f8 Qh4-g3+ Kg2-f1 Qg3-h3+ Kf1-g1 Qh3-e6 Bd6xf4+ Kh6-g6
6/16 00:00 3,559 237,000 -0.35 Rg8-f8 Qh4-g3+ Kg2-f1 Qg3-h3+ Kf1-g1 Kh6-g7 Rf8xf4 Qh3-e6
7/16 00:00 4,824 229,000 -0.37 Rg8-f8 Qh4-g3+ Kg2-f1 Qg3-h3+ Kf1-g1 Qh3-e6 Kg1-f1 h5-h4 Bd6xf4+ Kh6-g6 Kf1-f2
8/16 00:00 8,269 266,000 -0.37 Rg8-f8 Qh4-g3+ Kg2-f1 Qg3-h3+ Kf1-g1 Qh3-e6 Kg1-f1 h5-h4 Bd6xf4+ Kh6-g6 Kf1-f2
9/18+ 00:00 13,143 320,000 -0.32 Rg8-f8
9/18 00:00 14,184 289,000 -0.32 Rg8-f8 Qh4-g3+ Kg2-f1 Qg3-h3+ Kf1-f2 Qh3-h2+ Kf2-f1 Qh2-h1+ Kf1-f2 Kh6-g6 Bd6xf4 Qh1-h4+ Kf2-f1 Qh4-h3+ Kf1-g1
10/21 00:00 24,874 394,000 -0.36 Rg8-f8 Qh4-g3+ Kg2-f1 Qg3-h3+ Kf1-f2 Qh3-h2+ Kf2-f1 Kh6-g6 Bd6xf4 Qh2-h3+ Kf1-g1 Qh3-e6 Kg1-f2 h5-h4 Rf8-d8
11/22+ 00:00 42,001 500,000 -0.31 Rg8-f8
11/26 00:00 69,434 642,000 -0.23 Rg8-f8 Qh4-g3+ Kg2-f1 Qg3-h3+ Kf1-f2 Qh3-h2+ Kf2-f1 Kh6-g6 Rf8xf4 Qh2-h3+ Kf1-f2 Qh3-e6 Rf4-e4 Qe6-a2 Bd6-e5 Qa2-c2 Be5-d6
12/26 00:00 93,876 722,000 -0.23 Rg8-f8 Qh4-g3+ Kg2-f1 Qg3-h3+ Kf1-f2 Qh3-h2+ Kf2-f1 Kh6-g6 Rf8xf4 Qh2-h3+ Kf1-f2 Qh3-e6 Rf4-e4 Qe6-a2 Bd6-g3 Qa2-d5 Bg3-d6
13/26 00:00 138,191 858,000 -0.23 Rg8-f8 Qh4-g3+ Kg2-f1 Qg3-h3+ Kf1-f2 Qh3-h2+ Kf2-f1 Kh6-g6 Rf8xf4 Qh2-h3+ Kf1-f2 Qh3-e6 Rf4-e4 Qe6-d5 Kf2-f1 Qd5-d2 Kf1-f2 Qd2-b2 Re4-e6+ Kg6-f5 Re6-e5+ Kf5-g6 Re5-e4
14/27 00:00 245,833 1,064,000 -0.20 Rg8-f8 Qh4-g3+ Kg2-f1 Qg3-h3+ Kf1-f2 Qh3-h2+ Kf2-f1 Kh6-g6 Rf8xf4 Qh2-h3+ Kf1-f2 Qh3-e6 Rf4-e4 Qe6-d5 Re4-f4 Qd5-d2 Bd6-e5 Kg6-g5 Rf4-f8 Qd2-a2
15/32 00:00 630,021 1,503,000 -0.19 Rg8-f8 Qh4-g3+ Kg2-f1 Qg3-h3+ Kf1-f2 Qh3-h2+ Kf2-f1 Kh6-g6 Rf8xf4 Qh2-h3+ Kf1-f2 Qh3-e6 Rf4-e4 Qe6-d5 Re4-f4 Qd5-d2 Bd6-e5 Kg6-g5 Rf4-f8 Qd2-a2
16/32 00:00 828,562 1,587,000 -0.19 Rg8-f8 Qh4-g3+ Kg2-f1 Qg3-h3+ Kf1-f2 Qh3-h2+ Kf2-f1 Kh6-g6 Rf8xf4 Qh2-h3+ Kf1-f2 Qh3-e6 Rf4-e4 Qe6-d5 Re4-f4 Qd5-a2 Rf4-e4 Kg6-g5 Re4-e5+ Kg5-h6 Re5-e4 Kh6-g6 Bd6-g3 Qa2-d5 Bg3-d6 Qd5-d2 Kf2-g2 Qd2-a2 Kg2-f2 Kg6-g5
17/32 00:00 1,112,002 1,687,000 -0.19 Rg8-f8 Qh4-g3+ Kg2-f1 Qg3-h3+ Kf1-f2 Qh3-h2+ Kf2-f1 Kh6-g6 Rf8xf4 Qh2-h3+ Kf1-f2 Qh3-e6 Rf4-e4 Qe6-d5 Re4-f4 Qd5-a2 Rf4-e4 Kg6-g5 Re4-e5+ Kg5-h6 Re5-e4 Kh6-g6 Bd6-g3 Qa2-d5 Bg3-d6 Qd5-d2 Re4-f4 Qd2-c2 Rf4-e4 Qc2-a2 Bd6-g3
18/32 00:00 1,608,139 1,815,000 -0.19 Rg8-f8 Qh4-g3+ Kg2-f1 Qg3-h3+ Kf1-f2 Qh3-h2+ Kf2-f1 Kh6-g6 Rf8xf4 Qh2-h3+ Kf1-f2 Qh3-e6 Rf4-e4 Qe6-d5 Re4-f4 Qd5-d2 Rf4-e4 Qd2-a2 Bd6-g3 Qa2-d5 Bg3-d6 Qd5-d2 Re4-f4 Qd2-c2 Rf4-e4 Qc2-a2 Bd6-g3
19/33 00:01 2,356,763 1,938,000 -0.19 Rg8-f8 Qh4-g3+ Kg2-f1 Qg3-h3+ Kf1-f2 Qh3-h2+ Kf2-f1 Kh6-g6 Rf8xf4 Qh2-h3+ Kf1-f2 Qh3-e6 Rf4-e4 Qe6-d5 Re4-f4 Qd5-d2 Rf4-e4 Qd2-a2 Bd6-g3 Qa2-d5 Bg3-d6 Qd5-d2 Re4-f4 Qd2-c2 Rf4-e4 Qc2-a2 Bd6-g3
20/34 00:01 3,087,395 2,015,000 -0.19 Rg8-f8 Qh4-g3+ Kg2-f1 Qg3-h3+ Kf1-f2 Qh3-h2+ Kf2-f1 Kh6-g6 Rf8xf4 Qh2-h3+ Kf1-f2 Qh3-e6 Rf4-e4 Qe6-d5 Re4-f4 Qd5-d2 Rf4-a4 Qd2-g5 Ra4-f4 Qg5-d5 Rf4-e4 Qd5-d2 Bd6-g3 Qd2-a2 Bg3-d6 Kg6-g5 Re4-e5+ Kg5-h6 Re5-e4 Kh6-g6 Bd6-g3 Qa2-d5 Bg3-d6 Qd5-d2
21/35 00:02 4,279,139 2,097,000 -0.19 Rg8-f8 Qh4-g3+ Kg2-f1 Qg3-h3+ Kf1-f2 Qh3-h2+ Kf2-f1 Kh6-g6 Rf8xf4 Qh2-h3+ Kf1-f2 Qh3-e6 Rf4-e4 Qe6-d5 Re4-f4 Qd5-d2 Rf4-e4 Qd2-a2 Bd6-g3 Qa2-d5 Bg3-d6 Qd5-d2 Bd6-g3 Qd2-a2 Bg3-d6 Kg6-g5 Re4-e5+ Kg5-h6 Re5-e4 Kh6-g6 Bd6-g3
22/42 00:03 6,732,003 2,207,000 -0.19 Rg8-f8 Qh4-g3+ Kg2-f1 Qg3-h3+ Kf1-f2 Qh3-h2+ Kf2-f1 Kh6-g6 Rf8xf4 Qh2-h3+ Kf1-f2 Qh3-e6 Rf4-e4 Qe6-d5 Re4-f4 Qd5-d2 Rf4-e4 Qd2-a2 Bd6-g3 Qa2-d5 Bg3-d6 Qd5-d2 Re4-f4 Qd2-a2 Rf4-e4 Kg6-g5 Re4-e5+ Kg5-h6 Re5-e4 Kh6-g6 Bd6-g3
22/45+ 00:04 9,285,773 2,302,000 -0.14 Bd6-f8+
22/56+ 00:09 22,563,827 2,510,000 +3.96 Bd6-f8+
22/58 00:10 26,542,996 2,561,000 +4.55 Bd6-f8+ Kh6-h7 Rg8-g7+ Kh7-h8 Bf8-e7 Qh4-e1 Be7-f6 Qe1xe2+ Kg2-h1 Qe2-e6 Bf6-d4 Qe6-h6 Rg7-g6+ Kh8-h7 Rg6xh6+ Kh7xh6 Kh1-h2 Kh6-g6 Kh2-h3 Kg6-g5 Bd4-f2 Kg5-g6 Kh3-h4 Kg6-h6 Bf2-e1 Kh6-g6 Be1-c3 Kg6-h6 Bc3-e5 Kh6-g6 Be5xf4 Kg6-f5 Bf4-g3 Kf5-f6 Kh4xh5 Kf6-e6 Kh5-g4 Ke6-d5 Bg3-d6 Kd5-e6 f3-f4 Ke6-f6 Bd6-e5+ Kf6-e6 Kg4-f3 Ke6-f5 Be5-a1 Kf5-e6 Kf3-g4
23/58 00:10 27,019,924 2,556,000 +4.55 Bd6-f8+ Kh6-h7 Rg8-g7+ Kh7-h8 Bf8-e7 Qh4-e1 Be7-f6 Qe1xe2+ Kg2-h1 Qe2-e6 Bf6-d4 Qe6-h6 Rg7-g6+ Kh8-h7 Rg6xh6+ Kh7xh6 Kh1-h2 Kh6-g6 Kh2-h3 Kg6-g5 Bd4-f2 Kg5-g6 Kh3-h4 Kg6-h6 Bf2-e1 Kh6-g6 Be1-c3 Kg6-h6 Bc3-e5 Kh6-g6 Be5xf4 Kg6-f5 Bf4-g3 Kf5-f6 Kh4xh5 Kf6-e6 Bg3-f4 Ke6-f5 Bf4-d6 Kf5-f6 Kh5-g4 Kf6-e6 f3-f4 Ke6-f6 Bd6-e5+ Kf6-e6 Kg4-f3 Ke6-f5 Be5-a1 Kf5-e6 Kf3-g4
24/62 00:11 29,728,818 2,578,000 +4.55 Bd6-f8+ Kh6-h7 Rg8-g7+ Kh7-h8 Bf8-e7 Qh4-e1 Be7-f6 Qe1xe2+ Kg2-h1 Qe2-e6 Bf6-d4 Qe6-h6 Rg7-g6+ Kh8-h7 Rg6xh6+ Kh7xh6 Kh1-h2 Kh6-g6 Kh2-h3 Kg6-g5 Bd4-f2 Kg5-g6 Kh3-h4 Kg6-h6 Bf2-e1 Kh6-g6 Be1-c3 Kg6-h6 Bc3-e5 Kh6-g6 Be5xf4 Kg6-f5 Bf4-d2 Kf5-e6 Bd2-e3 Ke6-d5 Kh4-g3 Kd5-e5 Kg3-f2 Ke5-f6 Kf2-g3 Kf6-f5 Kg3-h4 Kf5-g6 Be3-g5 Kg6-f5 Kh4xh5 Kf5-e6 Kh5-g4 Ke6-e5 f3-f4+ Ke5-e6 f4-f5+ Ke6-f7 Kg4-h4
25/62 00:12 32,320,846 2,591,000 +4.55 Bd6-f8+ Kh6-h7 Rg8-g7+ Kh7-h8 Bf8-e7 Qh4-e1 Be7-f6 Qe1xe2+ Kg2-h1 Qe2-e6 Bf6-d4 Qe6-h6 Rg7-g6+ Kh8-h7 Rg6xh6+ Kh7xh6 Kh1-h2 Kh6-g6 Kh2-h3 Kg6-g5 Bd4-f2 Kg5-g6 Kh3-h4 Kg6-h6 Bf2-e1 Kh6-g6 Be1-c3 Kg6-h6 Bc3-e5 Kh6-g6 Be5xf4 Kg6-f5 Bf4-d2 Kf5-e6 Bd2-e3 Ke6-d5 Kh4-g3 Kd5-e5 Kg3-f2 Ke5-f6 Kf2-g3 Kf6-f5 Kg3-h4 Kf5-g6 Be3-g5 Kg6-f5 Kh4xh5 Kf5-e6 Kh5-g4 Ke6-e5 f3-f4+ Ke5-e6 f4-f5+ Ke6-f7 Kg4-h4
26/62 00:14 37,166,362 2,624,000 +4.59 Bd6-f8+ Kh6-h7 Rg8-g7+ Kh7-h8 Bf8-e7 Qh4-e1 Be7-f6 Qe1xe2+ Kg2-h1 Qe2-e6 Bf6-d4 Qe6-c4 Bd4-a1 h5-h4 Ba1-f6 Qc4-e6 Bf6-d4 Qe6-c4 Bd4-a1 h4-h3 Ba1-f6 Qc4-e6 Bf6-d4 Qe6-c4 Bd4-a1 h3-h2 Ba1-f6 Qc4-e6 Bf6-d4 Qe6-h6 Rg7-g2+ Kh8-h7 Rg2xh2 Kh7-g6 Rh2xh6+ Kg6xh6 Kh1-g2 Kh6-g6 Kg2-h3 Kg6-h5 Bd4-f6 Kh5-g6 Bf6-a1 Kg6-h5 Ba1-d4 Kh5-g5 Bd4-e5 Kg5-f5 Be5-g7 Kf5-g5 Bg7-d4 Kg5-h5 Bd4-f6
27/62 00:15 40,926,294 2,639,000 +4.59 Bd6-f8+ Kh6-h7 Rg8-g7+ Kh7-h8 Bf8-e7 Qh4-e1 Be7-f6 Qe1xe2+ Kg2-h1 Qe2-e6 Bf6-d4 Qe6-c4 Bd4-a1 h5-h4 Ba1-f6 Qc4-e6 Bf6-d4 Qe6-c4 Bd4-a1 h4-h3 Ba1-f6 Qc4-e6 Bf6-d4 Qe6-c4 Bd4-a1 h3-h2 Ba1-f6 Qc4-e6 Bf6-d4 Qe6-h6 Rg7-g2+ Kh8-h7 Rg2xh2 Qh6xh2+ Kh1xh2 Kh7-g6 Bd4-a1 Kg6-g5 Kh2-h3 Kg5-h5 Ba1-e5 Kh5-g5 Be5-d4 Kg5-h5 Bd4-b2 Kh5-g5 Bb2-e5 Kg5-f5 Be5-d4 Kf5-g5 Bd4-f2 Kg5-h5 Bf2-g1 Kh5-g5 Bg1-f2 Kg5-h5
28/62 00:19 50,937,878 2,689,000 +4.73 Bd6-f8+ Kh6-h7 Rg8-g7+ Kh7-h8 Bf8-e7 Qh4-e1 Be7-f6 Qe1xe2+ Kg2-h1 Qe2-e6 Bf6-d4 Qe6-c4 Bd4-a1 h5-h4 Ba1-f6 Qc4-e6 Bf6-d4 Qe6-c4 Bd4-a1 h4-h3 Ba1-f6 Qc4-e6 Bf6-d4 Qe6-c4 Bd4-a1 h3-h2 Ba1-f6 Qc4-e6 Bf6-d4 Qe6-h6 Rg7-g2+ Kh8-h7 Rg2xh2 Qh6xh2+ Kh1xh2 Kh7-g6 Kh2-h3 Kg6-h5 Bd4-f6 Kh5-g6 Bf6-d8 Kg6-h5 Bd8-h4 Kh5-g6 Kh3-g4 Kg6-h6 Kg4xf4 Kh6-h5 Bh4-e1 Kh5-g6 Kf4-e5 Kg6-g5 f3-f4+ Kg5-g4 f4-f5

pichy
Posts: 2564
Joined: Thu Mar 09, 2006 2:04 am

Re: Can you make this version available for more testing ?

Post by pichy » Thu Apr 12, 2012 4:54 pm

pichy wrote:Can you make this version available as a download?
gladius wrote:
pichy wrote:This is where top GMs are superior to top engines in long term calculation and able to detect a position that will lead the human to win at the end by forcing Black into a Horizon effect in which Black will not be able to get out off.
Very nice position!

Stockfish currently can't find it within reasonable time, but, with this patch: https://github.com/glinscott/Stockfish/ ... inned_null, here is how it looks. The change was pretty minor. Adding a bonus when a friendly piece is blocking check to the enemy king, and not allowing null move pruning for the enemy in that situation. Whether it ends up increasing ELO or not is a separate question :).

Code: Select all

Analysis by Stockfish 120410 64bit 326 64bit:

1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Ke1 Qe6 4.Bxf4+ Kg6 
  ³  (-0.40)   Depth: 4/7   00:00:00
...
1.Rf8 Qe1 2.Bxf4+ Kg7 3.Re8 Kf7 4.Re4 Kg6 5.Bd6 Kf6 6.Be5+ Kf5 7.Bd6 h4 8.Re5+ Kg6
9.Re6+ Kf7 10.Re4 Kg6 11.Re6+ 
  =  (0.00)   Depth: 18/36   00:00:00  1190kN
...
1.Rf8 Qe1 2.Bxf4+ Kg7 3.Re8 Kf7 4.Re4 Kg6 5.Bd6 Kf6 6.Be5+ Kg6 7.Bd6 
  =  (0.00)   Depth: 32/45   00:00:37  82483kN
1.Bf8+ Kh7 2.Rg7+ Kh8 3.Be7 Qe1 4.Bf6 Qc1 5.Kh2 Qc2 6.Ba1 Qc4 7.Bb2 Qc2 8.Bf6 Qf5
9.Ba1 Qc2 10.Kh1 Qc4 11.e4 h4 12.Bf6 h3 13.Ba1 h2 14.Bf6 Qe6 15.e5 
  =  (0.08)   Depth: 33/45   00:00:40  126mN
...
1.Bf8+ Kh7 2.Rg7+ Kh8 3.Be7 Qe1 4.Bf6 Qxe2+ 5.Kh1 Qe6 6.Bd4 Qc4 7.Ba1 h4 8.Bf6 Qe6
9.Bd4 Qc4 10.Ba1 h3 11.Bf6 Qe6 12.Bd4 Qc4 13.Ba1 h2 14.Bf6 Qe6 15.Bd4 Qh6 16.Rg6+ Kh7 
  +-  (13.25)   Depth: 36/67   00:01:15  229mN
Can you make this version available as a download?

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