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Problem 279.1: Diyan Kostadinov & Nikola Predrag - Fairy (KoBul Kings)

diyannikola(17.11.2013) I composed this problem last night with SneK Chess, but today I decide to publish it as a KoBul Kings problem (both conditions working in the same way in case of capture of Knights only), because all transformations here are of the Kings, so this present the KoBul Kings condition more full than SneK Chess where all pieces can be transformed.

Update: After publication of the problem was found that it can be improved. Here you can see the version 279.1. which replace the initial problem for the tourney.




a) bl. 1.Se8! & 1.Sxe8(bK=rS) 2.Ka7+ Qxe8(wK=rS)=

b) bl. 1.Sb7! & 1.Sd5 2.Kxb7(bK=rS)+ Rxd5(wK=rS)=

Active white and black sacrifices, miniature,

non standart stipulation, nice twin form. (Author)



KoBul Kings - When a piece (not a pawn) of his own side is captured, a King transforms into a Royal piece of the same type as the captured one. When the King is in the form of any Royal piece and there is a capture of one of the pawns of his own side, he becomes a normal King again. 



+1 #1 Diyan Kostadinov 2013-11-18 03:13
If you still don't know about the fairy condition SneK Chess, you can see more about it here: kobulchess.com/en/news/7-2011-07-31-17-09-09/362-snek-chess.html
+1 #2 Kjell Widlert 2013-11-25 00:40
Two elegant KoBul stalemates. I imagine this started its life as a h=2.5 with black promotion, but with a move inversion dual in the bR line. The non-standard sequence of moves is a clever way of solving that problem.
+1 #3 Nikola Predrag 2013-11-25 12:14
Yes, it is very elegant but the stipulation does not look precise. There's one help-move by Black, then 2 series moves by White which FORCE the last black move. However, the help-play is not marked.
0 #4 Diyan Kostadinov 2013-11-25 12:48
Nikola, the helplay is not marked because there is not help-play here, it is selfstalemate. The full stipulation is "1 move by black and then series selfstalemate in 2 moves".
But Kjell is right that it can be done with two promotions (with stipulation HS=2.5), unfortunatelly with dual in 1...d1R solution.
So there are two possibilities: to make the problem with not so usual stipulation B1&Ser-S=2 to keep nice black Knight moves (with good twin - exchange two type pieces), or to make it with more usual condition HS=2 with twin moves bS and to have two promotions.
Here is the version: prntscr.com/26na3b

So it is the matter of taste which is better - nice moves by the bS in the original or two promotions in the version.
What the is your opinion?
+2 #5 Nikola Predrag 2013-11-25 15:04
I don't understand the stipulation, if it is a selfstalemate then why Black must play exactly the intended moves?
Another drawback is that after B1, it works also as a ser-h=2 with reversed colors. I would surely prefere something like:
W:Kc8,Sc4; B:Ka8,Sc3,Pd2
hs=3,Kobul,2 sol.
0 #6 Diyan Kostadinov 2013-11-25 19:16
Your version is excellent Nikola! The twins are avoided and the matched play by both Knights is nice. Here is the direct link for the problem with solution: i.imgur.com/O54CGnn.png

Probably I was not worked enough on the problem before the publication to miss such a clever improvement...
About your question for the stipulation - in such kind stipulations where one side make 1 or more moves before the main stipulation it is understandable that these first moves are "help" because after them the main condition should be prepared.
+2 #7 Kjell Widlert 2013-11-25 20:59
The version is a wonderful find and surely the Letztform of the idea! I was looking at similar positions myself, but like Diyan, I did not see this.
+1 #8 Nikola Predrag 2013-11-26 01:08
I spent some time trying to retain Diyan's variety of capturing bS by wS and wK, then I gave up. I was pretty sure that with both captures by wS it would be easy because it naturally determines the order of the moves and it was indeed a matter of minutes. The analogy is not so important by itself, but instead of the variety there is the clarity of the idea and the mechanism works naturally within the stipulation. Furthermore, without the need to capture bS, wK shows a purified antidualistic play.

How would such a stipulation, B1&Ser-S=2, be recognized by Popeye?
0 #9 seetharaman 2013-11-26 16:06
I was trying a similar stipulation B1/Series#5. Popeye considered the first black move as helpplay.
0 #10 Nikola Predrag 2013-11-28 07:14
How does the stipulation look in the Popeye input?
"B1/Series#5" is meaningless to Popeye.
+1 #11 seetharaman 2013-11-28 15:20
Dear Nikola.. I dont understand your comment. Perhaps the stipulation I gave was not clear. This is the Popeye input and output I got (using AP Win). The stipulation was one black move followed by Series#6.
Protocol h1
White Pa2 Kf1
Black Pc3 Ba1 Kh1
Stipulation 1->SER-#6
Option NoBoard NoThreat Variation

Popeye Windows-32Bit v4.63 (1431 MB)
1.Ba1-b2 1.a2-a4 2.a4-a5 3.a5-a6 4.a6-a7 5.a7-a8=R 6.Ra8-h8#
1.Kh1-h2 1.a2-a4 2.a4-a5 3.a5-a6 4.a6-a7 5.a7-a8=Q 6.Qa8-g2#

solution finished.Time = 0.031 s

As can be seen, black has a third choice of first move 1.c2 after which white cannot mate in 6 moves.
+1 #12 Nikola Predrag 2013-11-28 18:55
Thanks Ram! I didn't know how to indicate that introductory black move. "B1" was not accepted by Popeye but now, "1->" works fine.
+2 #13 Eric 2013-11-30 17:49
In the help file py-engl.txt you can find examples of stipulations according to Popeye input as well as many other details. Here are some examples:

HZg74 help-targetsquare-g7 in 4 moves
S+2 self-check in 2 moves
SER-+7 series-check in 7 moves
SEMI-R+4 semi-reflex-check in 4 moves
x3 Capture in 3 moves
SER-%4 series-Win_a_Piece in 4 moves
H##!4 help-"gegenmatt" in 4 moves
SER-H##3 series-help-"beidmatt" in 3 moves
2->ser-h#4 White makes 2 moves, then ser-h#4
h003 help-castling in 3 moves
ser-ct10 Series-direct circuit (switchback) in 10 moves (of W piece)
h3 help exchange place in 3 moves (Bl helps W swap 2 pieces from diagram)
h~1 any helpmove
pser-h#6 Parry series helpmate in 6
phser-s#6 Parry series selfmate in 6 (parry moves are help moves)
+1 #14 Nikola Predrag 2013-11-30 23:20
Thanks a lot Eric, that will be useful.

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