Komodo Dragon does not realize it

Post by **timetraveller** » 12/02/2021, 8:40

SF immediately!

white to move and reach a draw:

Karim · Post by **Karim** » 17/02/2021, 13:29

timetraveler wrote:SF immediately!

white to move and reach a draw:
[SetUp "1"] [FEN "5B1k/7p/6P1/4NnP1/8/8/K4p2/8 w - - 0 0"] { 5B1k/7p/6P1/4NnP1/8/8/K4p2/8 w - - 0 0 } * your web browser and/or your host do not support iframes as required to display the chessboard

g7+ kg8
Nd7 is a draw without checking it with an engine...

Post by **timetraveller** » 17/02/2021, 15:28

Karim wrote: g7+ kg8
Nd7 is a draw without checking it with an engine...

after 1) g7+ Kg8 2) Nd7 Nxg7!! and white loses...

but what happens after 1.g7+ Nxg7 Karim?
dragon still does not see through this...

Karim · Post by **Karim** » 18/02/2021, 7:14

timetraveler wrote:
Karim wrote: [Event "?"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "?"] [Black "?"] [Result "*"] [FEN "5B1k/7p/6P1/4NnP1/8/8/K4p2/8 w - - 0 1"] [Source "Analyze This App"] 1. g7+ Nxg7 2. Nf7+ Kg8 3. Bc5 f1=Q 4. Nh6+ Kh8 5. Bd6 *your web browser and/or your host do not support iframes as required to display the chessboard
but what happens after 1.g7+ Nxg7 Karim?
dragon still does not see through this...

This time I took shelter to crystal engine, ,, and it is now draw, ,, both my g pawn and bishop are now safe, due to danger of knight forks queen back with a check .... and e5 square is also fork with bishop check, so enemy can't move has knight....

Peter Grayson · Post by **Peter Grayson** » 18/02/2021, 18:32

timetraveler wrote:SF immediately!

white to move and reach a draw:
[SetUp "1"] [FEN "5B1k/7p/6P1/4NnP1/8/8/K4p2/8 w - - 0 0"] { 5B1k/7p/6P1/4NnP1/8/8/K4p2/8 w - - 0 0 } * your web browser and/or your host do not support iframes as required to display the chessboard

Is it the case that Komodo can actually play out the draw but gives a score related to the material difference because it does not search far enough ahead to identify the 50 move rule?

For example, Fritz 7 has sufficient capability to play out the draw but gives a score related to the material difference until it is almost on top of the draw ...

[Event "Draw test-5"]
[Site "Newport, South Wales"]
[Date "2021.02.17"]
[Round "1.1"]
[White "Fritz 7"]
[Black "Stockfish 110221"]
[Result "1/2-1/2"]
[Annotator "-6.44;0.00"]
[SetUp "1"]
[FEN "5B1k/7p/6P1/4NnP1/8/8/K4p2/8 w - - 0 1"]
[PlyCount "106"]
[EventDate "2021.02.17"]
[EventType "tourn"]
[SourceTitle "Fritz Engine Tournament"]
[Source "Grayson"]

{Intel(R) Core(TM)2 Quad CPU  Q9550 @ 2.83GHz 2833 MHz W=17.8 plies; 2,315kN/s;
218,132 TBAs B=65.4 plies; 4,377kN/s; 21,022,066 TBAs} 1. g7+ {[%eval -644,19]
[%emt 0:01:55]} Nxg7 {[%eval 0,84] [%emt 0:02:08]} 2. Nf7+ {[%eval -641,18] 
[%emt 0:00:21]} Kg8 {[%eval 0,55] [%emt 0:00:01]} 3. Bc5 {[%eval -653,17] 
[%emt 0:00:07]} f1=Q {[%eval 0,67] [%emt 0:00:05]} 4. Nh6+ {[%eval -653,17] 
[%emt 0:00:12]} Kh8 {[%eval 0,63] [%emt 0:00:01]} 5. Bd6 {[%eval -672,15] 
[%emt 0:00:08]} Ne6 {[%eval 0,76] [%emt 0:00:11]} 6. Be5+ {[%eval 0,18] [%emt
0:00:03]} Ng7 {[%eval 0,80] [%emt 0:00:09]} 7. Bd6 {[%eval 0,19] [%emt 0:00:03]
} Qf3 {[%eval 0,74] [%emt 0:00:06]} 8. Be5 {[%eval -603,17] [%emt 0:00:20] 
(Kb2)} Qd5+ {[%eval 0,64] [%emt 0:00:06]} 9. Ka3 {[%eval -594,17] [%emt 0:00:
13] (Kb1)} Qe6 {[%eval 0,70] [%emt 0:00:08]} 10. Kb4 {[%eval -594,17] [%emt 0:
00:15] (Bf6)} Qh3 {[%eval 0,70] [%emt 0:00:08]} 11. Bf6 {[%eval -562,16] [%emt
0:00:08]} Qc8 {[%eval 0,74] [%emt 0:00:07]} 12. Bd4 {[%eval -591,17] [%emt 0:
00:19] (Kb3)} Qf8+ {[%eval 0,66] [%emt 0:00:07]} 13. Kc4 {[%eval -562,17] 
[%emt 0:00:09] (Kc3)} Qf1+ {[%eval 0,70] [%emt 0:00:09] (Qf4)} 14. Kb4 {
[%eval -566,17] [%emt 0:00:09] (Kc3)} Qb1+ {[%eval 0,69] [%emt 0:00:07] (Qf4)}
15. Kc4 {[%eval -559,17] [%emt 0:00:08] (Kc3)} Qf1+ {[%eval 0,71] [%emt 0:00:
40]} 16. Kb4 {[%eval 0,19] [%emt 0:00:02] (Kc3)} Qf8+ {[%eval 0,44] [%emt 0:00:
07]} 17. Kc4 {[%eval 0,19] [%emt 0:00:03] (Kb3)} Qe8 {[%eval 0,50] [%emt 0:00:
07]} 18. Kc3 {[%eval -587,15] [%emt 0:00:09] (Bf6)} Qa8 {[%eval 0,52] [%emt 0:
00:07]} 19. Bf6 {[%eval -569,16] [%emt 0:00:12]} Qg2 {[%eval 0,50] [%emt 0:00:
07] (Qc8+)} 20. Kc4 {[%eval -562,16] [%emt 0:00:08] (Kb3)} Qa8 {[%eval 0,66] 
[%emt 0:00:09] (Qc2+)} 21. Kc3 {[%eval 0,17] [%emt 0:00:02]} Qg2 {[%eval 0,68]
[%emt 0:00:14]} 22. Kc4 {[%eval 0,18] [%emt 0:00:03] (Kd3)} Qc2+ {[%eval 0,67]
[%emt 0:00:07]} 23. Kd5 {[%eval -562,17] [%emt 0:00:09] (Kd4)} Qd3+ {[%eval 0,
68] [%emt 0:00:12]} 24. Kc5 {[%eval -559,18] [%emt 0:00:12]} Qg6 {[%eval 0,61]
[%emt 0:00:09] (Qe4)} 25. Kd5 {[%eval -572,17] [%emt 0:00:10] (Kd6)} Qd3+ {
[%eval 0,70] [%emt 0:00:12] (Qh5)} 26. Kc5 {[%eval 0,20] [%emt 0:00:02] (Bd4)}
Qf1 {[%eval 0,70] [%emt 0:00:08]} 27. Be5 {[%eval -562,16] [%emt 0:00:10] (Kd4)
} Qf2+ {[%eval 0,68] [%emt 0:00:07]} 28. Bd4 {[%eval -569,17] [%emt 0:00:09] 
(Kc4)} Qh2 {[%eval 0,66] [%emt 0:00:08] (Qc2+)} 29. Bf6 {[%eval -562,16] [%emt
0:00:09] (Kb4)} Qf4 {[%eval 0,66] [%emt 0:00:09] (Qe2)} 30. Kd5 {[%eval -559,
17] [%emt 0:00:13] (Kc6)} Qb8 {[%eval 0,66] [%emt 0:00:08] (Qd2+)} 31. Kc4 {
[%eval -569,16] [%emt 0:00:09] (Be5)} Qb1 {[%eval 0,64] [%emt 0:00:09] (Qc8+)}
32. Bd4 {[%eval 0,18] [%emt 0:00:03] (Kc3)} Qc2+ {[%eval 0,66] [%emt 0:00:08]}
33. Kd5 {[%eval -562,17] [%emt 0:00:12] (Kb4)} Qb3+ {[%eval 0,65] [%emt 0:00:
10] (Qd2)} 34. Kc5 {[%eval -559,17] [%emt 0:00:09] (Kd6)} Qh3 {[%eval 0,79] 
[%emt 0:00:08] (Qa3+)} 35. Bf6 {[%eval -562,16] [%emt 0:00:09]} Qa3+ {[%eval 0,
64] [%emt 0:00:10] (Qe3+)} 36. Kc4 {[%eval -566,16] [%emt 0:00:08]} Qc1+ {
[%eval 0,61] [%emt 0:00:24] (Qa4+)} 37. Kd5 {[%eval -566,17] [%emt 0:00:09] 
(Kd3)} Qb1 {[%eval 0,59] [%emt 0:00:07] (Qh1+)} 38. Kc6 {[%eval -559,17] [%emt
0:00:15] (Kc5)} Qb8 {[%eval 0,62] [%emt 0:00:07] (Qe4+)} 39. Kc5 {[%eval -562,
17] [%emt 0:00:12]} Qc8+ {[%eval 0,60] [%emt 0:00:08] (Qe8)} 40. Kb4 {[%eval
-559,17] [%emt 0:00:09] (Kb5)} Qe6 {[%eval 0,60] [%emt 0:00:08]} 41. Be5 {
[%eval 0,18] [%emt 0:00:03] (Ka3)} Qb6+ {[%eval 0,57] [%emt 0:00:08]} 42. Kc4 {
[%eval -562,18] [%emt 0:00:18] (Kc3)} Qb7 {[%eval 0,59] [%emt 0:00:08]} 43. Bf6
{[%eval -556,17] [%emt 0:00:11]} Qc8+ {[%eval 0,55] [%emt 0:00:10] (Qc6+)} 44.
Kb4 {[%eval 0,19] [%emt 0:00:03] (Kd5)} Qc6 {[%eval 0,51] [%emt 0:00:08]} 45.
Bd4 {[%eval -522,16] [%emt 0:00:09]} Qd6+ {[%eval 0,51] [%emt 0:00:08]} 46. Kc4
{[%eval -419,17] [%emt 0:00:14] (Kc3)} Qa6+ {[%eval 0,53] [%emt 0:00:08]} 47.
Kc3 {[%eval 0,15] [%emt 0:00:07]} Qe6 {[%eval 0,52] [%emt 0:00:08] (Qa5+)} 48.
Bf6 {[%eval -275,15] [%emt 0:00:05]} Qd5 {[%eval 0,54] [%emt 0:00:09]} 49. Kb4
{[%eval 0,18] [%emt 0:00:03] (Bd4)} Qd6+ {[%eval 0,59] [%emt 0:00:09]} 50. Kb3
{[%eval 0,18] [%emt 0:00:02] (Kc4)} Qd1+ {[%eval 0,70] [%emt 0:00:09] (Qd7)}
51. Kb4 {[%eval 0,20] [%emt 0:00:04] (Kb2)} Qd2+ {[%eval 0,84] [%emt 0:00:09] 
(Qd7)} 52. Kc4 {[%eval 0,20] [%emt 0:00:02] (Ka4)} Qc2+ {[%eval 0,114] [%emt 0:
00:10] (Qd7)} 53. Kd5 {[%eval 0,47] [%emt 0:00:00] (Kb5)} Qb3+ {[%eval 0,245] 
[%emt 0:00:00]} 1/2-1/2

Unlike Fritz 6 that completely messes up with 5.Ba3?? ...

[Event "Draw test-2"]
[Site "Newport, South Wales"]
[Date "2021.02.17"]
[Round "1.1"]
[White "Fritz 6"]
[Black "Stockfish 110221"]
[Result "0-1"]
[Annotator "-5.84;0.00"]
[SetUp "1"]
[FEN "5B1k/7p/6P1/4NnP1/8/8/K4p2/8 w - - 0 1"]
[PlyCount "34"]
[EventDate "2021.02.17"]
[EventType "tourn"]
[SourceTitle "Fritz Engine Tournament"]
[Source "Grayson"]

{Intel(R) Core(TM)2 Quad CPU  Q9550 @ 2.83GHz 2833 MHz W=13.5 plies; 2,770kN/s;
417,546 TBAs B=78.2 plies; 3,278kN/s; 30,659,266 TBAs} 1. g7+ {[%eval -584,20]
[%emt 0:02:43]} Nxg7 {[%eval 0,79] [%emt 0:02:00]} 2. Nf7+ {[%eval -619,17] 
[%emt 0:00:08]} Kg8 {[%eval 0,65] [%emt 0:00:01]} 3. Bc5 {[%eval -575,18] 
[%emt 0:00:11]} f1=Q {[%eval 0,77] [%emt 0:00:06]} 4. Nh6+ {[%eval -597,17] 
[%emt 0:00:10]} Kh8 {[%eval 0,64] [%emt 0:00:01]} 5. Ba3 {[%eval -641,16] 
[%emt 0:00:15] (Bd6)} Qc4+ {[%eval -15254,53] [%emt 0:00:06]} 6. Ka1 {[%eval
-687,17] [%emt 0:00:10] (Kb1)} Ne6 {[%eval -15258,50] [%emt 0:00:07]} 7. Bb2+ {
[%eval -712,17] [%emt 0:00:13]} Nd4 {[%eval -32671,57] [%emt 0:01:16]} 8. Kb1 {
[%eval -806,17] [%emt 0:00:17]} Qd5 {[%eval -32707,32] [%emt 0:00:06]} 9. Bc3 {
[%eval -32703,14] [%emt 0:00:10]} Qe4+ {[%eval -32713,33] [%emt 0:00:03] (Qb5+)
} 10. Ka1 {[%eval -1091,15] [%emt 0:00:10]} Kg7 {[%eval -32723,36] [%emt 0:00:
05]} 11. Bb2 {[%eval -1322,13] [%emt 0:00:05] (Nf5+)} Kg6 {[%eval -32733,36] 
[%emt 0:00:04]} 12. Ka2 {[%eval -1353,12] [%emt 0:00:15]} Qe3 {[%eval -32739,
51] [%emt 0:00:07]} 13. Ng4 {[%eval -32731,11] [%emt 0:00:03] (Bxd4)} Qe6+ {
[%eval -32747,65] [%emt 0:00:05]} 14. Ka1 {[%eval -32741,11] [%emt 0:00:03] 
(Kb1)} Qxg4 {[%eval -32749,62] [%emt 0:00:05]} 15. Bc3 {[%eval -32747,9] [%emt
0:00:00] (Bxd4)} Qd1+ {[%eval -32761,245] [%emt 0:00:00]} 16. Kb2 {[%eval
-32763,3] [%emt 0:00:00] (Ka2)} Qc2+ {[%eval -32763,245] [%emt 0:00:01]} 17.
Ka3 {[%eval -32765,2] [%emt 0:00:00]} Qb3# {[%eval -32765,245] [%emt 0:00:01]}
0-1

Peter

Post by **timetraveller** » 18/02/2021, 19:07

oh well, you remind me of something Peter!!

and the internet forgets nothing-have a look:
https://www.amazon.de/ChessBase-Fritz-7-Premier-Collection/dp/B00006JJIL?language=en_GB&th=1

where we could still keep up with the engine

how the time flies

Homayoun · Post by **Homayoun** » 15/08/2021, 7:09

Very nice puzzle.

Outskirts CheSS ForuM

Outskirts CheSS ForuM