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# 12 chess pieces

## Question

Can you place the 12 chess pieces on a chess board, given the following clues?

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Thought that wording was a bit repetitive. . .

Spoiler

Knight A2

White Pawns D6, G3

Black Pawn D5

Black King D2

Black Queen H2

Bishop G1

White King F3

White Queen G4

Black Rook C6

White Rooks A1, C7

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Question about #13, which sounds to me like a conflict.

should it read “ nothing is south of the one black rook, which is on the edge”?

or should it read “ nothing is south of the white rook that is on the edge”

or even “one of the white rooks is on the edge, and has nothing south of it”?

for that matter, should it name a different piece than white rook?

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There are two white rooks ... one of them is on the edge, and has nothing south of it.

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For number 8, does that mean the black queen is on the opposite E-W extreme or just opposite half?  Or can it potentially refer to N-S? Number 12 would seem to contradict that if it means the E-W extreme.

Edited by Thalia
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6 and 16 also seem to contradict as d5 is a white space according to the pictures I'm finding of notation.

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8) E-W extreme

16) white pawn is on d6 (not d5)

Apology for this mistake!

Here's an updated clue list ...

Edited by rocdocmac
16) white pawn is on d6 (not d5)
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If the black queen is on the extreme east per clue 8 (N,S,W spaces adjacent), and alone in her column per clue 12, that leaves only the W space to put both the pawn and bishop mentioned in clue 8. Should it maybe read the queen is alone in her own row?

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Think I figured out my problem. What is the definition of adjacent? Sharing edges? Diagonal squares?

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Seems like there could be multiple answers from my interpretation of the clues.

Spoiler

Knight A3

White Rooks A2, B1

Black Rook A1

White Pawns D6, G3

Black Pawn D5

White King F3

Black King D2

White Queen G4

Black Queen H2

Bishop G1

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@ Thalia ...

12) Black Q in her own column is correct.

"Adjacent" means any of the 8 surrounding squares.

One solution!

Spoiler

Edited by rocdocmac
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Ok. Can you tell me which of the clues my answer violates?

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Thalia, Looks like 8 is violated by your answer. I expect the black queen and white knight to be on the same row or same column.

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That's quite possible, but from my interpretation, without any mention of the same row, the end refers to the whole side of the board. I will try it that way though!

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Ed

Spoiler

Based on 3 and 8, the black queen has to be in one of the bottom 2 rows. There are 2 white rooks. One is in a column by itself (15). The other is south of the knight (1) and north of the black rook. That means the knight has to be at least the 3rd row from the bottom so that doesn't work with being directly across from the queen.

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Seems like I left another mistake in the original OP unattended to. Here's the final clue list. Read carefully and you should get the answer easily now. Sorry for the blunder, guys!

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Is Ed's interpretation of 8 correct?

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Yes, Ed is correct.

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Spoiler

I have these set:

Knight A2

White Pawns D6, G3

Black Pawn D5

Black King D2

Black Queen H2

Bishop G1

These I can find a couple options. One option:

White King C6

White Queen D7

Black Rook F3

White Rooks A1, F4

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Thalia, what would you get if I change clue 4 to ...

?

Spoiler

Your solution is certainly a valid one and you'll get your kudos due! I should have changed clue 4 as given above to force a unique solution!

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Way to go Thalia! I’ll bet the problem thought you were playing Whack-amole.

Nice problem, Rocdocmac, every one of the 18 items was a different kind of constraint; I didn’t find a convenient way to represent the data. I’m glad Thalia solved it.

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Thanks Ed! I made a chessboard in Paint and put mini chess pieces in each of the squares. Erased the pieces as I went through the clues.

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Well done Thalia! Here's the solution:

[Thank you Captain Ed!]

... and Thalia's alternative solution (before changing clue #4).

Edited by rocdocmac
minor edit

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