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{The legitimacy of this study depends on
proving the following 8 alternatives as only drawn.} 1. a6!!!!! (1. b4 Ng3 2. a6 {
Diagram [#] Black doesn't have to take the a pawn because the black knight has
an extra tempo. The difference now is that the black knight is active soon
enough to capture the h pawn.} Ne4 (2... bxa6 $4 3. Rg7 $18) 3. Rxb7+ Ka8 4. b5
Nf6 {Diagram [#]} 5. Rf7 Nxh7 6. b6 Nf8 7. Ra7+ Kb8 8. Re7 Ng6 9. Re6 Nf4 10.
Rd6 Re8 11. Kb2 Ne6 12. Rc6 Nf4 13. Rd6 Ne6 $11) (1. Kc2 Nf2 2. Rxf2 (2. a6 Ne4
3. Rxb7+ Ka8 4. b4 Nf6 $11 {The difference between this position and 3rd
diagram is that the white king has advanced versus the b pawn going to b5
hardly a winning try.}) 2... Rxh7 $11 {Diagram [#] BCE pg 346 gives this piece
setup as drawn}) (1. Ka2 {It is difficult to see how this is any better than 1.
Kc2}) (1. Kc1 {Same comment as above}) (1. Rd7 Ka7 {Now the black king is
active}) (1. Re7 Ka7 {Same comment as above}) (1. Rg7 Ka7 2. b4 Nf2 {Diagram
[#] Now the black knight and the black king are active}) (1. b3 {Surely cannot
be better than 1.b4}) 1... bxa6 (1... Ng3 2. Rxb7+ Ka8 3. Rg7 $18 {Diagram [#]}
) 2. Rg7 Rxh7 3. Rxh7 {Diagram [#] Nalimov tablebase gives this as a win for
white with black to move} 1-0
Thanks Michael. I retired from government life and have been a chess teacher for the last 5 years both in elementary French and English schools as well as personal one-on-one tutoring. I have recently developed an advanced chess course for players up to master level that has 331 strategical and 434 tactical chess positions ordered by difficulty. All have been checked by Houdini and are clearly the best moves in the position. The strategical positions cover every known concept of strategy and the tactical positions cover all known tactical motifs.
This one has a first move that is not obvious. White to play and win
This looks pretty obvious to me, considering that the main line goes one move deep and that after 1.a6 Black has virtually no choice. It may be a decent conclusion to a study but to make it a worthy study some imaginative foreplay would be necessary.
In response to Jean Hebert's request for foreplay may I present this orgasmic improvement to my study? White to play and win. 1.Rxh1!!!!!!! leads to the main line after1......Nxh1. However for the study to be valid the only other reasonable move
1.R7xf2 must be examined. After 1.....Rxf1 2.Rxf1Rxh7 is a dead draw. Thanks to Jean Hebert for challenging me to do better.
In response to Jean Hebert's request for foreplay may I present this orgasmic improvement to my study? White to play and win. 1.Rxh1!!!!!!! leads to the main line after1......Nxh1. However for the study to be valid the only other reasonable move
1.R7xf2 must be examined. After 1.....Rxf1 2.Rxf1Rxh7 is a dead draw. Thanks to Jean Hebert for challenging me to do better.
Would you like some more challenge or are you pleased with your study as is ? :)
I suggest that Mr. Davies didn't find the a6 move in 2 seconds. Sure IMs like Mr Hebert may find the a6 move almost immediately but that doesn't negate the study's pedagogical value or its legitimacy. Finding a non obvious move for IMs and GMs in a study is extremely difficult to do but if you will pardon the fact that I stumbled on this position while looking at the Qvs NN tablebase, perhaps Jean Hebert might want to tackle this original study .
I suggest that Mr. Davies didn't find the a6 move in 2 seconds. Sure IMs like Mr Hebert may find the a6 move almost immediately but that doesn't negate the study's pedagogical value or its legitimacy.
Well, I'm far from being an IM, but with these studies, my first reaction is often to look for 'the trick'. What's the tricky, non-obvious move.
In the specific case of your study, I saw 1.a6 in about 2-3 seconds. The problem with the study is that once you see 1.a6, you can basically stop calculating.
Still a nice problem and a nice move. As you said, it also has some pedagogical value (destroy the king's protection, 7th rank etc.). I'd be glad if I had the chance to play it in a real game.
Just not that challenging.
Let's just say that your best original endgame study is yet to come.
I suggest that Mr. Davies didn't find the a6 move in 2 seconds. Sure IMs like Mr Hebert may find the a6 move almost immediately but that doesn't negate the study's pedagogical value or its legitimacy. Finding a non obvious move for IMs and GMs in a study is extremely difficult to do but if you will pardon the fact that I stumbled on this position while looking at the Qvs NN tablebase, perhaps Jean Hebert might want to tackle this original study.
I will pass that one. A position taken as is in a tablebase can hardly be called "original study". It can be the final part of a study though.
The first move of a study does not necessarily have to be difficult. It is the continuation (and/or the variations) that somehow must be a challenge for the solver and express some beautiful/interesting idea.
DRAW
This position is actually from a study by L. Prokes with colour reversed. According to Prokes, Black (White) wins. However I think that he is wrong. The position is a draw and thus becomes a new study. I would be surprised if anyone could find the right first move in 2 seconds and why the alternatives are wrong.
Last edited by Jean Hébert; Monday, 26th November, 2012, 12:47 PM.
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