perplexus.info :: Games : No colors known?

No colors known? (Posted on 2004-08-04)

A friend told me about a chess game he had seen. At certain moment, the only pieces on board were a Queen at h8, a Rook at g6, and the Kings at h6 and g8. He didn't remember what color was each piece, but it can be worked out... how?

      +---+---+---+---+---+---+---+---+
      |   |   |   |   |   |   | K | Q | 8
      +---+---+---+---+---+---+---+---+
      |   |   |   |   |   |   |   |   | 7
      +---+---+---+---+---+---+---+---+
      |   |   |   |   |   |   | R | K | 6
      +---+---+---+---+---+---+---+---+
      |   |   |   |   |   |   |   |   | 5
      +---+---+---+---+---+---+---+---+
      |   |   |   |   |   |   |   |   | 4
      +---+---+---+---+---+---+---+---+
      |   |   |   |   |   |   |   |   | 3
      +---+---+---+---+---+---+---+---+
      |   |   |   |   |   |   |   |   | 2
      +---+---+---+---+---+---+---+---+
      |   |   |   |   |   |   |   |   | 1
      +---+---+---+---+---+---+---+---+
        a   b   c   d   e   f   g   h

If the Rook had been at g7, what would have been the colors?

Submitted by Federico Kereki

Rating: 3.1429 (7 votes)

Solution: (Hide)

Both Kings cannot be in check, so one is in double check by Rg6 and Qh8 -- the only possibility is that the last move was g7xh8=Q+, so Kh6, Qh8 and Rg6 are White, and Kg8 is Black.
In the second case, the only possibility is that the last move was h7-h8=Q+, with Kg8, Qh8 and Rg7 being White, and Kh6 Black.

Comments: ( You must be logged in to post comments.)

Subject	Author	Date
Puzzle Answer	K Sengupta	2024-01-19 23:15:32
No Subject	Angel	2005-02-04 03:28:35
re: Solution, part 1	keisha	2004-10-01 14:13:14
re: my solution	nikki	2004-08-27 14:23:58
my solution	Michael	2004-08-22 09:28:42
The ubiquituous 'Impossible Solution'	Daniel	2004-08-09 00:36:32
re(3): Solutions	Charlie	2004-08-05 15:40:53
re: true answer	e.g.	2004-08-05 15:21:09
re(2): Solutions	e.g.	2004-08-05 15:17:50
true answer	Bri	2004-08-05 10:20:58
re: Solutions	Charlie	2004-08-05 08:00:20
Solutions	e.g.	2004-08-04 14:31:12
Solution, part 2	stan	2004-08-04 12:16:37
ummm...	Thalamus	2004-08-04 12:15:46
Solution, part 1	stan	2004-08-04 12:10:49
re: Kings Problem ! ( oops! )	Vishal Baghel	2004-08-04 12:02:17
Kings Problem !	Vishal Baghel	2004-08-04 11:59:15

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