Definition: (click to show/hide)
Kangaroo-Rose: Moves, captures on Rose lines (Rose(RO): (1,2) Octagonal Rider (extents the move of the Knight on a circular path e.g. a4-b6-d7-f6-g4-f2-d1-b2 or a4-c5-e4-f2)) by jumping to the first square after two hurdles.
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No.1073 N.Shankar Ram
India
original – 21.05.2016
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Solutions: (click to show/hide) |
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white Ke4 Pb3
black Pb4 KRc6
h=2* 2 solutions (2+2)
Kangaroo-Rose c6
(no bK)
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1...Ke4-d3 2.KRc6-c2 Kd3*c2 {= ("stationary" switchback)}
1.KRc6-c2 Ke4-d5 2.KRc2-c6 Kd5*c6 {= ("normal" switchback)}
1.KRc6-c6 Ke4-d5 2.KRc6-c6 Kd5*c6 {= (two "stationary" switchbacks)
(C+ by WinChloe v3.34; Kangaroo-Rose not implemented in Popeye)}
Routes(BPb4 is the hurdle... twice!):
from c6 to c2: c6-b4- c2-e1- g2-h4- g6-e7- c6-b4- c2
from c2 to c6: reverse of above
from c6 to c6: c6-e7- g6-h4- g2-e1- c2-b4- c6-e7- g6-h4- g2-e1- c2-b4- c6
from c2 to c2: c2-e1- g2-h4- g6-e7- c6-b4- c2-e1- g2-h4- g6-e7- c6-b4- c2
I composed this whimsy while studying Petkov’s No.900 (23.09.2015).
After seeing Nikola Predrag’s and Juraj Lörinc’s comments to Packa’s No.1068 (14.05.2016), I felt this was the right time to publish it!(Author)
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No.1073 N.Shankar Ram (India)
The stipulation is h=2 2.2.1.1
The set play is not interesting as it only repeats the actual, so I didn’t mention it.
With 2.2.1.1, the full solution is:
1.KRc2 Kd5 2.KRc6 Kxc6=
1… Kd3 2.KRc2 Kxc2=
1. KRc6 Kd5 2.KRc6 Kxc6=
1… Kd3 2.KRc2 Kxc2=
KR is a cunning fellow. But in my opinion (which I can not verify through WinChloe) the problem is cooked, such as.: 1. … Kf3 2.KRg2 Kxg2 or = 1 … Kf5 2.KRg6 Kxg6 =
Kangaroo-rose must stop on the first square after the hurdle.
You are right. I was hypnotized by Kangaroo-Lion, which occurred a few days before.
Have got a new version of Py2Web from Dmitri Turevski, allowing to show the move to the own square. Now 1.KRc6-c6 works in animation! Thanks a lot to Dmitri!
On main page the piece is mentioned as Kangaroo-Lion, not as Kangaroo-Rose, so the description looks puzzling.
Yes.. I didn’t notice that.. Needs to be corrected.
Oh, I’m sorry! The post on site’s home corrected, Kangaroo-Rose, of course. Probably, No.1071 on that post had influenced me..
Using the same hurdle twice in the same move – very amusing idea! I am still smiling.
BTW, is Rose-hopper not enough?
I have not tried to computer-test it, but it looks like this kind of hopper still can only oscillate between c2 and c6.
Or is it also possible to use something like Kangaroo2016-Rose (the piece which has to jump over 2016 pieces before stopping)?
Georgy,
Rose-hopper allows cooks/duals!
And yes, a Rose-Kangaroooo.. would also work! (jumps over oooo.. pieces ;-))
You’re kidding, but something rational in it can be found. For example, Kangaroo3-Lion and a circle with two hurdles. In the position wKLe8 – bPc7, c3 may move Lion only to b5, then in the second move to any empty square of its circle (except b5).
-…”Rose-hopper allows cooks/duals!”…-
Popeye doesn’t allow null-moves so I can’t test it, but what about:
bRose-hopper (c6) and wFers (e4) or with wKe4 but wPb4/bPb5?
Nikola,
– Rose Hopper c6, Fers e4 is sound!
– Rose Hopper c6, WKe4, WPb4, BPb5 still has duals/cooks. Position of Ps makes no difference
Thanks!
Well, yes, bPb5 removes the cooks when Rose-hopper plays from c2 to f5 (using wKe3/d4 as a hurdle). But it may move from c6 to f3 over wKd4/e5 and then loose a hurdle.
So, wPb3,bPb4,bPb5 should at least remove the cooks with Rose-hopper playing to f5/f3.
In principle, the nature of Rose-Kangarooooo (which needs 2 or more hurdles) is used only for cook-stopping on a “small board” 8×8. Adding one file left to a-file would allow KRc2 to play to f5 over wKe3 twice (or more times).
The intended solutions require no more than a Rose-hopper.
Laco’s Kangaroo3-Lion offers interesting possibilities.