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5 problem(s) found in 2239 milliseconds (displaying 5 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND K='Scherzaufgabe' AND K='Bosma'] [download as LaTeX]

1 - P1377133
Robert Norman
Jens Kristiansen

Far off Chess 13/12/2008
RN, Version JK
P1377133
(3+6) C+
#4
1. Kf7! droht 2. Txh5#
1. ... Sd6+,Sd8+ 2. g7+ Kh7 3. g8=D+ Kh6 4. Dg7#
play all play one stop play next play all
A beautiful version of P1377131

http://faroffchess.blogspot.com/2008/12/in-twilight-zone-of-chess-rules.html

"Ok, you may say that this is all old stuff, very entertaining but with no relevance for nowadays chess. So? Well, look at this endgame study which circulated among the chess insiders in the 80s:

White to move and win - my version (from memory)

I believe I have read somewhere that the composer is from Dar-Es-Salaam, but I can not find sources for that.

The solution is: 1. Kf7, Nd6+ 2. g7+!, Kh7 3. g8D+ and mate next move.

Then you may object that white is in check, in fact a double check, when he unaffectedly moves his little pawn at the second move. Yes, he is in check BEFORE the move, but is he after? You see, at that time the rules stated that the king is in check "...when the square it occupies is threatened by one or TWO of the opponents pieces." So the check is elegantly parried by making the kings square threatened by THREE pieces!

Relax, nowadays the rules state that the square in question must be threatened by "... if one or more of the opponents pieces."
James Malcom: What is the Winchloe solution then, even with duals? Of course, as an endgame study, it is still correct. (2020-11-13)
A.Buchanan: As a #4, WinChloe gives: 1.Rf7! [2.T×h5‡]
1…Cd8+ 2.g7+ Rh7 3.g8=D+ Rh6 4.Dg7‡
1…Cd6+ 2.g7+ Rh7 3.g8=D+ Rh6 4.Dg7‡
Switchback blanc
Switchback de Pion
Echecs croisés
Guidelli
Echec double
Batterie noire
Auto-clouage indirect
Déclouage indirect
Promotion
Clé désampliative (2020-11-26)
more ...
comment
Keywords: Golden Age, Joke, Bosma, Promotion (D)
Genre: n#, Fairies
Computer test: C+ WinChloe v3.51
FEN: 7k/rn6/5KP1/p1p4b/8/8/8/7R
Input: James Malcom, 2020-06-20
Last update: A.Buchanan, 2024-02-01 more...
2 - P1381497
James Malcom
chess.stackexchange.com 15/6/2020
P1381497
(3+4) C+
#1
Bosma
1. 0-0#!
play all play one stop play next play all
https://chess.stackexchange.com/a/29992/15543
A.Buchanan: Hi James, couple of nits about old Bosma:
(1) From the 1985 Laws: "Article 5. THE MOVES OF THE PIECES The King (a) Except when cast[l]ing, the king moves to any adjoining square that is not attacked by an opponent's piece." This is separate from Article 9. CHECK 9.1 "The king is In check when the square it occupies is attacked by one or two of the opponent's pieces; in this case the latter is or are said to be "checking the king.' 9.2 Check must be parried by the [move] immediately following." This point may have been an assumption in earlier compositions, as e.g. it prevents kings from being adjacent.
(2) And again from Article 5. "(f) Castling is prevented for the time being - (i) if the king's original square or the square which the king must cross over or that which it is to occupy is attacked by an opponent's piece," Does this prevent your 1.0-0?
What do you think? (2020-11-08)
James Malcom: Ah, why did I but never bother to look at the castling rules!

Well I see nothing against adjacent kings, and seeing about how the "loophole" was about was not explicitly stated couldn't be done, I see it as allowed, and thus what to watch out for in cooks.

The rule on castling says "piece," not pieces. So, quite simply, castling in, out (P1381498), and through (P1381499) check is allowed in my view. (2020-11-09)
James Malcom: Furthermore, if a king is "attacked," they are in check, plain and simple. So, since a triple check/ attack is not defined as a danger to the king, the king may go to any such square, including the acts of catling and adjacent kings.

Also, going by the law itself, and not the Bosma conditions, the king may be captured, but it does nothing and that side can never be checkmated, while Bosma Chess itself allows no king capture. But since the effect is the same, allowing for my jokes to be C+ by Winchloe if the program agrees. Maybe try out my castlings in it? (2020-11-09)
James Malcom: And indeed Andrew has tested my castling problems now-all are C+? (2020-11-14)
James Malcom: Typo-!, not ?. (2020-11-14)
more ...
comment
Keywords: Joke, Bosma, Miniature, Castling as mating move
Genre: n#, Fairies
Computer test: C+ WinChloe 3.51
FEN: 8/8/8/8/8/7n/5Rrp/2k1K2R
Input: James Malcom, 2020-11-03
Last update: A.Buchanan, 2024-02-01 more...
3 - P1381499
James Malcom
chess.stackexchange.com 12/8/2020
P1381499
(6+5) C+
#2
Bosma
1. 0-0+!
1. ... Shxf1 2. Dg4#
1. ... Sgxf1 2. Df2#
1. ... Lxf1 2. Tf2#
play all play one stop play next play all
https://chess.stackexchange.com/a/29992/15543
A.Buchanan: Nice way to combine an orthodox theme with Bosma castling (2020-11-13)
James Malcom: Thanks, Andrew. Castling with check is the easiest way to achieve it of course, not to mention the flight taking. I'll try out a version without check, here soon. (2020-11-13)
comment
Keywords: Joke, Bosma, Castling key, Checking key, x pieces capture on one square, Flight taking
Genre: 2#, Fairies
Computer test: C+ WinChloe 3.51
FEN: 8/8/8/5B2/5p1Q/5kn1/2NRb2n/4K2R
Input: James Malcom, 2020-11-03
Last update: A.Buchanan, 2024-02-01 more...
4 - P1381500
James Malcom
English Chess Forum (Website) 13/6/2020
P1381500
(3+4) C+
#1
Bosma
1. Kc2#!
play all play one stop play next play all
https://www.ecforum.org.uk/viewtopic.php?p=246809#p246809

Reprint: https://chess.stackexchange.com/a/29992/15543
James Malcom: The wSe1 prevents the orthodox cook of 1. ... Kxc2. (2020-11-14)
comment
Keywords: Joke, Bosma, Miniature
Genre: n#, Fairies
Computer test: C+ WinChloe 3.51
FEN: 8/8/8/8/8/3p4/3rp3/RK1kN3
Reprints: chess.stackexchange.com 13/6/2020
Input: James Malcom, 2020-11-03
Last update: A.Buchanan, 2024-02-01 more...
5 - P1381502
James Malcom
chess.stackexchange.com 13/6/2020
P1381502
(6+1) C+
#1
Bosma
1. Se5#!
play all play one stop play next play all
A.Buchanan: Trivial verification, perhaps, but at least it confirms that WinChloe's understanding of the condition resembles James'. (2020-11-13)
comment
Keywords: Joke, Bosma, Miniature, Flight taking, Rex solus (s)
Genre: n#, Fairies
Computer test: C+ WinChloe 3.51
FEN: 8/7B/3B2NK/8/5k2/6P1/5Q2/8
Input: James Malcom, 2020-11-03
Last update: A.Buchanan, 2024-02-01 more...
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