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Topic: Identify the Chess Pieces (Read 841 times) |
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ThudnBlunder
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In the diagram below, each different letter represents a different Black or White chess unit.
For each letter find which unit it represents. (As usual, White is playing up the board.)
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| « Last Edit: Sep 16th, 2003, 1:22am by ThudnBlunder » |
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BNC
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Re: Identify the Chess Pieces
« Reply #1 on: Sep 15th, 2003, 11:24pm » |
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Mind clarifying for me -- Black pawn and white pawn -- are they represented by different letters?
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ThudnBlunder
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Re: Identify the Chess Pieces
« Reply #2 on: Sep 16th, 2003, 1:19am » |
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Black and White pawns, if any, are represented by different letters. 
(I have changed the original wording from 'chess piece' to 'chess unit'.)
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| « Last Edit: Sep 16th, 2003, 1:24am by ThudnBlunder » |
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BNC
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Re: Identify the Chess Pieces
« Reply #3 on: Sep 16th, 2003, 2:39am » |
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This is probably wrong (I'm a really bad chess player), but here is my guess (if, by some off-chance it's true, I'll explain my reasoning):
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A: Black knight
B: White pawn
C: White king
D: White knight
E: Black king
And the black knight at D3 just made his mate move.
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wowbagger
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Re: Identify the Chess Pieces
« Reply #4 on: Sep 16th, 2003, 3:38am » |
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on Sep 16th, 2003, 2:39am, BNC wrote:| This is probably wrong (I'm a really bad chess player) |
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Not that being a good chess player would be of much help... 
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At first sight, I also came as far as your A's, B's, C and E.
After taking a closer look at you proposition, I claim that the position would be illegal. That's because before Black's move (which doesn't mate by the way: cxe3/exd3) White must have made a legal move. But which? It can't have been with the King or any Pawn, and all squares where the Knight could have come from are occupied. So I guess a little more thought is needed.
Really intriguing riddle by the way, T&B!
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| « Last Edit: Sep 16th, 2003, 3:41am by wowbagger » |
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ThudnBlunder
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Re: Identify the Chess Pieces
« Reply #5 on: Sep 17th, 2003, 4:05am » |
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Your solution is correct, BNC. But some explanation of your method would have been nice.
Quote:| After taking a closer look at you proposition, I claim that the position would be illegal. |
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That Sherlock Holmes book seems to be taking a long time to arrive, wowbagger. K on b1 to c1 is OK.
Part 2: Move the A on g1 to b1.
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| « Last Edit: Sep 17th, 2003, 9:19pm by ThudnBlunder » |
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wowbagger
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Re: Identify the Chess Pieces
« Reply #6 on: Sep 17th, 2003, 5:13am » |
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on Sep 17th, 2003, 4:05am, THUDandBLUNDER wrote:| That Sherlock Holmes book seems to be taking a long time to arrive, wowbagger. |
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Well, I haven't ordered it yet. And I wouldn't have time to read it for the time being anyway.
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Silly me! 
*scolds himself for not having installed a browser that does not crash using javascript with this forum, leading to cumbersome search for appropriate smiley code*
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| « Last Edit: Sep 17th, 2003, 5:15am by wowbagger » |
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BNC
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Re: Identify the Chess Pieces
« Reply #7 on: Sep 17th, 2003, 8:21am » |
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on Sep 17th, 2003, 4:05am, THUDandBLUNDER wrote:Your solution is correct, BNC. But some explanation of your method would have been nice.
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Hehe. All-righty now!
Start by counting the pieces:
7 A's, 7 B's, 1 each of C,D, and E
So the 2 kings must be C,D or E. D is exculded, because 2 kins can't be next to eachother, so we know C and E are the two kings.
Let's look at B now. What piece can it be. It can't be a rook, because it checkes either king, and it couldn't have just moved in, because it's blocked on line 3. It can't be a knight, because for either color, there are two night checking a king. The same is true for bishop, and ofcourse queens. Black pawns are excluded for the same reason, so we know: B=White Pawn
A now. A could be either a rook or a knight. Since A=rook would put one of the kings in a check prior to the last move, A must be a knight.
If A-knight and E-king are different in color, E would be in "double check", so color(E)=color(A).
For similar logic as before, D must be knight too. Since color(E) is taken by A, we get color(D)=color(C)
Giving colors to A,E and C,D was just a guess. I don't see a reason they can't be reveresed...
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wowbagger
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Re: Identify the Chess Pieces
« Reply #8 on: Sep 17th, 2003, 8:46am » |
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Well done, BNC.
on Sep 17th, 2003, 8:21am, BNC wrote:| A now. A could be either a rook or a knight. Since A=rook would put one of the kings in a check prior to the last move, A must be a knight. |
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Minor nitpick: A could also be a queen, but it's the same argument as with the rook of course.
Quote:| Giving colors to A,E and C,D was just a guess. I don't see a reason they can't be reveresed... |
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I do! 
There are too many A's to be compatible with the B's, or in other words: Only Black can have promoted five pawns to knights.
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BNC
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Re: Identify the Chess Pieces
« Reply #9 on: Sep 17th, 2003, 1:49pm » |
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on Sep 17th, 2003, 8:46am, wowbagger wrote:I do!
There are <hidden msg removed>. |
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Why, ofcourse... it was staring me in the face, and I didn't see it... My turn to
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ThudnBlunder
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Re: Identify the Chess Pieces
« Reply #10 on: Sep 18th, 2003, 7:31am » |
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How about Part 2?:
Same diagram, but with the A on g1 moved to b1
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wowbagger
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Re: Identify the Chess Pieces
« Reply #11 on: Sep 18th, 2003, 8:46am » |
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on Sep 18th, 2003, 7:31am, THUDandBLUNDER wrote:How about Part 2?:
Same diagram, but with the A on g1 moved to b1 |
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Well, the reasoning for B and C/D/E still stands, but if A were a black knight, C would have to be the white king (square e1 is in double check) and we have no legal last move for white. (I hope this time I'm right.)
So A is a black rook or queen and, consequently, C is the black king and E the white king.
The last move would have been by the black rook, capturing on f1. Before that, a white rook could have moved from g1 to f1, so I don't see a restriction regarding the colour of piece D: it could be a black or white knight.
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ThudnBlunder
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Re: Identify the Chess Pieces
« Reply #12 on: Sep 19th, 2003, 7:47am » |
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That's strange! The Answer says that the capture Rxf1+ rules out D being a White knight!
But, like you, I don't see how.
After all, White has a legal previous move.
eg, Black checked on h1 with the rook, White moved N from g3 to f1, and then Black played Rxf1+.
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| « Last Edit: Sep 20th, 2003, 12:26am by ThudnBlunder » |
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