آیا شاه سفید میتواند قلعه برود؟

آیا شاه سفید میتواند قلعه برود؟
by Ari Siletz
27-Sep-2011
 

معمولا معما‌های شطرنج از این قرار است که شاه حریف در چند حرکت فاتحش خونده است. راستش از وقتی‌ نرم افزار اومده که پوست از کله قهرمانان شطرنج دنیا می‌کنه، دیگه اینجور معما‌ها لوس شده.  در ضمن بازی با دوستان از طریق ایمیل هم غیر ممکن شده، چون پس از رایج شدن این نرم‌افزار‌ها به دلایل نامعلومی بازی همشون به سطح جهانی‌ رسیده. خوشبختانه خیلی‌ قبل از اینکه نرم افزار‌های شطرنج در بازار دم در آرند فیلسوف، ریاضیدان، و شعبده باز آمریکایی، Raymond Smullyan، نوع جدیدی معمای شطرنج اختراع کرد که نظیرش را در تصویر بالا می‌بینید. سؤال این است:  شاه سفید میتواند قلعه رود یا نه‌؟

یاد آوری: اگر شاه در حین بازی حرکت کند دیگر حق قلعه رفتن ندارد،  حتا اگر دوباره به خانه خود برگردد. لطفا از این یاد آوری تعبیر سیاسی نکنید.

در ضمن: در اینجور معما کاری نداریم که طرفین خوب بازی کردند و از فرصت استفاده کردند و یا بطور احمقانه مهره حرکت دادند. فقط اینرا میدانیم که بازیکنان قواعد شطرنج را رعایت کردند.

طرح معما از  Philip Brocoum ...


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Ari Siletz

AO

by Ari Siletz on

The real fun in a game puzzle is the part where you think about it; solving it is secondary. It's only in real world puzzles where the payoff table is often reversed and the solution is more important than the process. Clearly, the cure for a disease trumps the search for a drug.

As for a solution to the above puzzle. As Abarmard saw, the White King can't castle because it has moved before.

I like Raymond Smullyan type chess puzzles for two reasons:

1. There's no software (yet) than can solve them--except the software in our brains. This addresses our frustration with computers being able to run chess circles around us nowadays.

2. They open a new vista on the game. Instead of the traditional "thinking ahead"  the puzzles demand a careful look at the history of the play. As every one on IC knows, analyzing history is a favorite pastime. These puzzles are abstractions of the same drive to reconstruct the past with the difference that clean deductions can be made without resorting to speculation. The catharsis is worth the few minutes spent on an absolutely trivial "subject of history."

 

 


Anonymous Observer

Ari -

by Anonymous Observer on

At first I tried to think about this problem, but then I realized that it was too complicated, and gave up trying.  Chess gets me real frustrated, especially now that I spend hours on end playing it on my iPad.  It's really a challenge to play with a computer that can calculate your next ten moves in less than a second.  


Anahid Hojjati

Thanks Ari

by Anahid Hojjati on

unfortunately, I don't even play hokm. You can always do another literature one, actually I may do a puzzle blog on literature but don't tell Hooshang since he thinks that I am too competitive and this will only make him more convinced :).


Ari Siletz

Anahid

by Ari Siletz on

I'll see what I can come up with regarding a backgammon, hokm, or even gol yaa pooch puzzle. I remember that with hokm the best puzzle was always how to cheat without getting caught.


Anahid Hojjati

Ari jan, for those of us

by Anahid Hojjati on

who don't know chess, can you do some blog puzzles in "takhte nard" and also "maro pele".


Abarmard

Thanks Ari

by Abarmard on

I used most of my morning trying to figure this out. I think it made sense that since there was no way out for white queen to get out, other than f field, king had to move. Still I continued in thinking in two lines of logic:

First I wanted to see if it's possible for the king to be checked and black piece be kill by rokh rather than the king.

and if queen got out before bishop. There was no way for both to happen since both showing openning with taking a piece. No way other than king had to move in either case. Most powerful case is that how did the queen got out? puzzle solved ;)

Thanks very much for this, but please don't do it again. I can get hooked easily :)


Ari Siletz

Abarmard

by Ari Siletz on

 

Your are on the mark with the D3 clue. White's queen couldn't have gotten out via C2 because at the time it was blocked by the pawn which is now at D3. So the White Queen had to have gotten out via F2, which requires the king moving out of the way. Good detective work!

By the way, bishops at F1 and C1 could have been captured by Black Queen or Black Knights...or for that matter Black Castle (now at A8) or Black King even. Can't see any clues that eliminate these weird possibilities. 

As you have found out, an interesting aspect of this type of "chess puzzle" is the irreversibility of pawn moves in chess, which in a rough way simulates a direction of time, allowing cause and effect ordering. As a result one of the most exciting processes in solving some puzzles of this type involve the slow discovery that a major piece is actually a promoted pawn.   

 

 

Esfand: As you can see, this type of puzzle uses the chessboard as a "crime scene" where there are clues as to what must necessarily have happened in the past. Traditional chess strategy or "good play" is not the issue, only that the rules of chess are not violated. I liked this particular puzzle because even though it clearly looks like the White King can castle, the evidence of board positions says otherwise.

 

 

 

 


Abarmard

Final answer

by Abarmard on

There is no way for white bishop to be missing without the king moving.

Final answer.

 

PS. Now that I look at it again, the white bishops could have been taken by black knight...


Abarmard

Mystry

by Abarmard on

My findings so far:

-I am still trying to figure out the details but I would say that the white king has moved...

-The question that I am trying to answer right now is how did the black bishop got killed? In order for white queen to get out, pawn D3 has killed the black bishop, but the bishop C8 could have not gotten out before back pawn takes the queen and open the route for black bishop!!!


Abarmard

Still thinking. Whether king moved in those attacks

by Abarmard on

This is hard. I am not that good in chess :)


Abarmard

I GET IT

by Abarmard on

OK, I get it.

I stared at the board and see that none of the pawn (for bishop movement) have not moved but the bishops are missing! HOW? King must have been checked before.

I still like to see how the position got there.


Abarmard

Ari, do you mean legally?

by Abarmard on

I am not sure what it is you are asking. Are you asking if that's a good move?


Esfand Aashena

آری جان معلومه که شاه میتواند قلعه برود. چرا نتواند؟!

Esfand Aashena


البته اگر برود اسبش را از دست خواهد داد و بعد هم بدبخت خواهد شد! هر چند که already وزیرش را از دست داده و قلعه برود یا نرود غزلش خوانده شده!

Everything is sacred