Position 2:
Bobby Fischer-William Addison
Cleveland 1971
White's 29th move....
[d]4n3/pp5p/6k1/2P2pp1/5p2/2B2P2/PPK3PP/8 w - - 0 1
Sloution:29.Be5!
Fischer is corraling the knight so it'can't move without being captured....
If 29....Ng7 or 29....Nf6,white will capture the knight and achieves a winning
king and pawn endgame taking into consideration white's queen side pawn majority....
Great, great, great position to test engines. Be5 implies a deep understanding of the position. Any engine that does not play it, does not understand this endgame.
Position 2:
Bobby Fischer-William Addison
Cleveland 1971
White's 29th move....
[d]4n3/pp5p/6k1/2P2pp1/5p2/2B2P2/PPK3PP/8 w - - 0 1
Sloution:29.Be5!
Fischer is corraling the knight so it'can't move without being captured....
If 29....Ng7 or 29....Nf6,white will capture the knight and achieves a winning
king and pawn endgame taking into consideration white's queen side pawn majority....
I have this one running but I am not sure current Crafty will find it. Parts of the evaluation are locked out, and pawn majority evaluation is one of those parts. So unless it can see actually making a passer that is a "distant passer" it probably will not find this at present.
Hi Bob,
To tell you the truth,I thought Crafty was one of the first engines that could solve this position quickly,I'll run it as a MP engine to see if it can find the correct move....
Old ones should solve it just fine. The current 22.2 version we are working on is the only one with the majority code temporarily disabled as we test bits and pieces of the eval.
Position 2:
Bobby Fischer-William Addison
Cleveland 1971
White's 29th move....
[d]4n3/pp5p/6k1/2P2pp1/5p2/2B2P2/PPK3PP/8 w - - 0 1
Sloution:29.Be5!
Fischer is corraling the knight so it'can't move without being captured....
If 29....Ng7 or 29....Nf6,white will capture the knight and achieves a winning
king and pawn endgame taking into consideration white's queen side pawn majority....
Great, great, great position to test engines. Be5 implies a deep understanding of the position. Any engine that does not play it, does not understand this endgame.
Miguel
Indeed,it reflects the level of the positional understanding of the chess engines....Kd3 and Bd4 are not acceptable for me as a solution....
_No one can hit as hard as life.But it ain’t about how hard you can hit.It’s about how hard you can get hit and keep moving forward.How much you can take and keep moving forward….
So an outdated program on an outdated hardware does well on this outdated position !
Thanks Marc,a quite interesting approach,even more,I am a big fan of all the Fritz versions as I am still testing Fritz 5.32 in my tournaments
Too bad I can't make Fritz 4.00 or Fritz 5.00 to work with my XP....
_No one can hit as hard as life.But it ain’t about how hard you can hit.It’s about how hard you can get hit and keep moving forward.How much you can take and keep moving forward….
Dr.Wael Deeb wrote:Indeed,it reflects the level of the positional understanding of the chess engines....Kd3 and Bd4 are not acceptable for me as a solution....
I'm not sure why you say Kd3 is "not acceptable", it also wins.
Dr.Wael Deeb wrote:Indeed,it reflects the level of the positional understanding of the chess engines....Kd3 and Bd4 are not acceptable for me as a solution....
I'm not sure why you say Kd3 is "not acceptable", it also wins.
Yes,the white's position is already winning,but freezing the knight with Be5 seems to be the fastest way,Kd3 will only enlong the black suffering....
_No one can hit as hard as life.But it ain’t about how hard you can hit.It’s about how hard you can get hit and keep moving forward.How much you can take and keep moving forward….
Dr.Wael Deeb wrote:Indeed,it reflects the level of the positional understanding of the chess engines....Kd3 and Bd4 are not acceptable for me as a solution....
I'm not sure why you say Kd3 is "not acceptable", it also wins.
Yes,the white's position is already winning,but freezing the knight with Be5 seems to be the fastest way,Kd3 will only enlong the black suffering....
There is no doubt that to the human way of thinking Be5 makes the most sense. It may even lead to the quickest mate, although that might be very hard to demonstrate. However programs quickly see other moves also win, and saying winning moves are "not acceptable" seems odd to me.
Dr.Wael Deeb wrote:Indeed,it reflects the level of the positional understanding of the chess engines....Kd3 and Bd4 are not acceptable for me as a solution....
I'm not sure why you say Kd3 is "not acceptable", it also wins.
Yes,the white's position is already winning,but freezing the knight with Be5 seems to be the fastest way,Kd3 will only enlong the black suffering....
There is no doubt that to the human way of thinking Be5 makes the most sense. It may even lead to the quickest mate, although that might be very hard to demonstrate. However programs quickly see other moves also win, and saying winning moves are "not acceptable" seems odd to me.
Not acceptable according to the book if we have to be precise
_No one can hit as hard as life.But it ain’t about how hard you can hit.It’s about how hard you can get hit and keep moving forward.How much you can take and keep moving forward….
Wael,
Nice puzzle! I think humans would probably play Be5 to limit black knight's counter play. However, for computers, future counter play can be minimized by precise calculation (after allowing knight activation).
One way to think about it is if white plays Be5, less accuracy is needed later in the game. While a win might is still possible as noted by Robin and Bob, the precision required later is higher for humans. Unfortunately, there is no simple standard way to measure accuracy of play needed (especially by computer metrics).
