作者LPH66 (1597463007)
看板puzzle
标题[中译] Puzzleup 2014 (9) Knights and Rooks
时间Wed Sep 24 20:16:30 2014
题目网址:
http://www.puzzleup.com/2014/
http://www.puzzleup.com/2014/puzzle/?250
答题时限: ９月25日７ＰＭ－比赛结束（约12月17日）
加分时限: ９月25日７ＰＭ－10月１日６：５９ＰＭ
答对可得基本分１００分。答案可上传５次，每改１次答案从基本分扣２０分。
比赛期间内可随时上传答案，加分时限内答对第ｎ天加（６－ｎ）分
另依题目的难易有额外加分（如有８０％的人这题答错，答对者加８０分）
◆Knights and Rooks
In how many different ways can two knights and two rooks be placed on a
standard chessboard so that no one attacks the others?
If this question had been asked for a 4x4 board than the answer would be 88.
Four of those are as follows.
在一个标准西洋棋盘上放入两个骑士及两个城堡使其皆不攻击其他棋子有几种放法？
若题目改问 4x4 的棋盘则答案为 88。
以下为其中四种配置。
Ｒ Ｒ Ｒ Ｒ
Ｒ Ｎ Ｎ Ｒ
Ｎ Ｒ Ｒ Ｎ
Ｎ Ｎ Ｎ Ｎ
--
2012 Q4 (
#1GAyHf0z)、2013 Q3 (
#1I0ef8KE) 都在排国王
这次终於换排别的棋子了吗 XD
--
'Oh, Harry, don't you
see?' Hermione breathed. 'If she could have done
one thing to make
absolutely sure that every single person in this school
will read your interview, it was
banning it!'
---'Harry Potter and the order of the phoenix', P513
--
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1F：推 MrSherlock: 问个蠢问题,是不能攻击到"自己以外"的旗子? 09/24 22:03
2F：→ MrSherlock: 这样不就有四国? 09/24 22:04
3F：→ LPH66: 啊, 直译确实是这样...旧题因为只有国王一定互攻所以照抄了 09/24 22:23
4F：→ LPH66: 我改一改；然後没错，你可以看成四国 09/24 22:23
※ 编辑: LPH66 (123.195.39.85), 09/25/2014 01:44:26
※ 编辑: LPH66 (123.195.39.85), 09/27/2014 04:11:13