No.1235
Ladislav Salai jr., Emil Klemanič, Ladislav Packa (Slovakia) &
Michal Dragoun
(Czechia)

JF-LOGO-1

Original Fairy problems
JF – 2017(I): January – June


Definitions: (click to show/hide)


No.1235 Ladislav Salai jr.,
Emil Klemanič, Ladislav Packa,
Michal Dragoun

Slovakia/Slovakia/Slovakia/Czechia

original – 30.06.2017

Solution: (click to show/hide)

white Kb1 Qg7 Ra5 Rd6 Bg1 Sd5g6 pa2a3c2 RLb4 BLa6 BLe2 NLe7 black Kc4 pc3f2h5 RLc8 RLh1 BLf1

s#2                                            (14+7)
Rook-Lion b4, c8, h1
Bishop-Lion a6, e2, f1
Nightrider-Lion e7


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Thomas Maeder
Thomas Maeder
3 years ago

1…fxg1=R 2.S*g*f4+ Rg4#
1…fxg1=B 2.S*d*f4+ Bd4#

shankar ram
shankar ram
3 years ago
Reply to  Thomas Maeder

The animation is working correctly. Only the notation is missing the departure squares. Needs correction of the underlying py2web script.

seetharaman
seetharaman
3 years ago

I think this task of 4 different answers to black AUW has not been done in orthodox S#2 many times. I know of only one such example.

shankar ram
shankar ram
3 years ago
Reply to  seetharaman

It’s actually 6 different answers to a black super AUW (4 ortho plus 2 fairy promotions)

Michal Dragoun
Michal Dragoun
3 years ago

Seetharaman: there are even several various mechanisms, mostly realized by Michal Caillaud, but the first invented already by G. Hume.
E.g. yacpdb Nos. 86603, 86608, 258735, 367766, 304362. Recently Y. Ueda published some such selfmates in Problem Paradise.

Georgy Evseev
Georgy Evseev
3 years ago

Is there no better key?
Even Sf6-d5 looks more preferrable to me…

Georgy Evseev
Georgy Evseev
3 years ago
Reply to  Georgy Evseev

No, I am wrong – RL promotion available in this case, but the question still stays.

Georgy Evseev
Georgy Evseev
3 years ago
Reply to  Georgy Evseev

Ka1-b1 seems to work

Michal Dragoun
Michal Dragoun
3 years ago
Reply to  Georgy Evseev

Yes, Ka1-b1 works. Definitely, the key 1.RLb4-h4 is not ideal, as takes Black four moves in zugzwang position. On the other hand, it brings more dynamic in play, as creates answer for three variations.

Georgy Evseev
Georgy Evseev
3 years ago
Reply to  Michal Dragoun

In fact RLb4-h4 creates answer for 5 variations, while Ka1-b1 does it only for 4).

Michal Dragoun
Michal Dragoun
3 years ago
Reply to  Georgy Evseev

Yes, you are right, I didn’t notice immediately, how much white pieces is able to move on b1…