Duchamp's position

White to play, Marcel Duchamp

Duchamp's riddle (1943), according to GM Beliavsky/Mihalcisin.

Marcel Duchamp (1887-1968) is a well-known french surrealist artist who decided to gradually remove himself from the art world to explore the chess world as an avid chess player and composer. As an artist, he is remembered primarily as the creator of the "ready-made" pieces and was influential in the dada/conceptual art movements (giving birth later to the "pop-art", made famous by A. Wharol amongst others). He later emigrated to the U.S. Here are a few links :

http://www.marcelduchamp.net/



http://fr.wikipedia.org/wiki/Marcel_Duchamp (french)



In the chess world, Duchamp cowrote an endgame book with Halberstadt ( about the "cases conjuguees"). I haven't seen it so any reader owning it is invited to comment on the book itself, which is supposed to be very technical and dry. He has played numerous competitive games, some of them available on http://www.chessgames.com/



It appears also that Duchamp has created a chess riddle, according to Beliavsky/Mihalcisin ( in their "winning endgame technique" book). I am not sure where it was first published , but here is the position above, with White to play. Does anyone know if there's a solution, when&where the position was first published, if any endgame expert besides Beliavsky/Mihalcisin has looked at it ? The two GMs think the position leads to a draw, without any win for White. Is there a solution, i.e a win for White ?

I'd love to hear the well-known trainer (and endgame authority) Dvorestky opinion on the matter. Let alone a leading grandmaster. Finally, is there any computer/table-base for 7 pieces total ? Any computer expert out there to come to the rescue ?

Critical Positions

White to play for a strong advantage

A Critical position is defined as a precise moment during a game where a move alters the phase of the game. It can be a sharp change in evaluation of the position (as found by an engine such as Rybka, Fritz) but not necessarily: it could be for instance giving up a pawn in exchange of pressuring the other side even though the game evaluation is " chances for both sides", as defending is usually harder than attacking). In average, 2 to 4 critical positions occur per game.

For a more detailed discussion, http://www.chesscafe.com/dvoretsky/dvoretsky.htm
where the famous russian coach defines the notion almost scientifically or philosphically. Now in the position I above, Black just played 1..Ra7? and there is a two-moves sequences taking advantage of the awkard position of the black pieces as White did sacrifice a pawn earlier.

Eventually, the game continued with
2 Rc1 Ba5
3 Bf4 (threatening Bb8) 3..Nxc5
4 Qd4!


Position II
Black to play and stay in the game

Black is now two pawns ahead but is under severe pressure on the c column while the Bishop in a5 is hanging. This is absolutely critical to find the right continuation (which I failed to do by the way!). This is a very difficult position with hidden tactical resources for both sides. If only we could get IM Dvorestky to analyze it properly :)

Anyway, there are two reasonable attempts here for Black. Calculation required either way!








Calculate well !