Retro-problems.htmBlack's Last Move?

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Discussion Overview

The discussion revolves around a chess puzzle, specifically focusing on deducing Black's last move in a given position. Participants explore various interpretations of the position, notation, and potential last moves, while also sharing personal experiences with chess puzzles.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • Some participants express difficulty accessing an image related to the puzzle, leading to speculation about permissions and authorization.
  • Several participants share their enjoyment of chess puzzles and reference works by Raymond Smullyan.
  • One participant describes the position with specific piece placements, suggesting a possible last move for Black as K a7-a8 and a pawn promotion for White.
  • Another participant proposes a creative interpretation of the last moves, noting the rarity of certain notational conventions used in chess.
  • Some participants challenge the proposed moves, stating that the problem uses standard notation and correcting the interpretation of the pieces' locations.
  • A later post presents a different chess scenario, asking participants to deduce the last move played in a new position.
  • Another participant confirms a previous solution regarding the last two moves in a different puzzle.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the interpretation of the original puzzle's last move, with multiple competing views and corrections being offered throughout the discussion.

Contextual Notes

Some assumptions about the piece placements and notational conventions remain unresolved, and there is uncertainty regarding the specific moves leading to the current position.

BobG
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Provided the image works (hope, hope) what was Black's last move?
(it's currently white's turn)

This is a pretty easy one. For some harder ones, check:

http://www.janko.at/Retros/
 

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BobG said:
Provided the image works (hope, hope) what was Black's last move?
(it's currently white's turn)

This is a pretty easy one. For some harder ones, check:

http://www.janko.at/Retros/

I am awfully sorry, but could anyone please explain me, why do i get:

hemmul, you do not have permission to access this page. This could be due to one of several reasons:

Your user account may not have sufficient privileges to access this page. Are you trying to edit someone else's post, access administrative features or some other privileged system?
If you are trying to post, the administrator may have disabled your account, or it may be awaiting activation.

message, when trying to view the picture you posted? :smile:
 
I got the same message. It's confusing, but perhaps the picture is awaiting authorization by the admins ?
 
I love these chess puzzles; Raymond Smullyan's "Mysteries of Sherlock Holmes" and "Arabian knights" are great.
 
arildno said:
I love these chess puzzles; Raymond Smullyan's "Mysteries of Sherlock Holmes" and "Arabian knights" are great.

haven't seen those two by Smullyan
I remember enjoying very much a book of logic puzzles by him
called
"What is the name of this book?"


an exellent sample question from that book was:

"which is better, eternal happiness or a ham sandwich?"
 
i saw the picture, but it was a bit bizzare. i mean, i could see just the black peices, the white ones were nowhere around.

please check the page.
 
When I click on it, it comes up fine, but that might not necessarily be a good test, since I'm the one that posted it.

Should have had only one black piece: Black King at A8.

White pieces: King at C8, Bishop at G1, Pawn at H2

(A-H left to right) (1 - 8 bottom to top)
 
Here's an interesting idea for the last two moves

black, K a7-a8
white p g2-g1 ->bishop

It is rare to ask for a bishop when advancing a pawn, and also rare to use notation which starts with black in the 1 and 2 ranks, but it is not unheard of.

Njorl
 
Njorl said:
Here's an interesting idea for the last two moves

black, K a7-a8
white p g2-g1 ->bishop

It is rare to ask for a bishop when advancing a pawn, ...

Njorl

Maybe white was toying with black...who anyways is doomed in 4 or 5 moves.
 
  • #10
Njorl said:
Here's an interesting idea for the last two moves

black, K a7-a8
white p g2-g1 ->bishop

It is rare to ask for a bishop when advancing a pawn, and also rare to use notation which starts with black in the 1 and 2 ranks, but it is not unheard of.

Njorl

Well, I admit it is creative, and you at least noticed the problem with the bishop's location, but that's not what happened. In other words, the problem uses normal notation with white starting from the 1 and 2 ranks.
 
  • #11
BobG said:
Well, I admit it is creative, and you at least noticed the problem with the bishop's location, but that's not what happened. In other words, the problem uses normal notation with white starting from the 1 and 2 ranks.

Oh, I discovered the real solution right away. I'm just horsing around.

Njorl
 
  • #12
1. Nb6-a8+ Kxa8

=======================

WHITE:
King on c1
Rook on b1
Knight on a1
Pawns on b2, c2, and d2

BLACK: King on a2

What was the last move played?
 
  • #13
Ursole was correct.

Last two moves on Ursole's puzzle:

Black - Ne2-c1 (any pieces taken unknown)
White - Kd1xN
 
  • #14
Well done, BobG.

A normal game of chess begins with 1. e4 and ends with one player playing NxR mate as his 5th move.

Reconstruct the game.
 

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