Die Schwalbe

11 problem(s) found in 3875 milliseconds (displaying 11 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND A='Petrovic, Tomislav'] [download as LaTeX]

1 - P0003287
Tomislav Petrovic
(VIII) Problem 37-40 09/1956
P0003287
(5+9) C+
h#2
1. fxg3ep h8=S 2. Sg4 Sxg6#
play all play one stop play next play all
A.Buchanan: The point I think is that the en passant is a tempo move. Otherwise wBf2 serves no purpose. How about sBh5 instead of sT? (2021-10-19)
more ...
comment
Keywords: En passant as key, Promotion (S), Tempo Move
Genre: h#, Retro
Computer test: HC+ Popeye v4.61 & trivial retro-logic
FEN: 8/7P/6pP/6pr/5pPk/4np1n/5P1p/7K
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2021-10-19 more...
2 - P0003335
Tomislav Petrovic
(XXI) Problem 37-40 09/1956
P0003335
(5+9) cooked
h#9
1. dxc3ep dxc3+ 2. Ka5 c4 3. d2 c5 4. d1=L c6 5. Lg4 hxg4 6. Kb6 g5 7. Ka7 g6 8. Kb8 g7 9. Kc8 g8=D/T#
play all play one stop play next play all
Cook: 1. b2 c5 2. b1=S c6 3. Sc3 dxc3+ 4. Ka5 cxd4 5. Kb6 d5 6. Ka7 d6 7. Kb8 dxc7+ 8. Ka7 c8=D 9. a5 Db7#
paul: See P0003212 as version. (2011-08-06)
Anton Baumann: C+?? Die Aufgabe ist eindeutig inkorrekt! (2021-01-27)
James Malcom: Fixed. (2021-01-27)
comment
Keywords: En passant as key, Promotion (D), konsekutive Umwandlungen 2 (L, D/T), En passant, Kindergarten Problem
Genre: h#, Retro
FEN: 8/2p5/p7/8/1kPp3p/1p1p2pP/3P2Pp/7K
Input: Gerd Wilts, 1995-06-03
Last update: James Malcom, 2021-01-27 more...
3 - P0003430
Tomislav Petrovic
(XIII) Problem 37-40 09/1956
P0003430
(4+15) cooked
h#3
1. dxe3ep Td1? 2. Le4 Txd6 3. Sg4 Tf6# usual AP try
1. dxe3ep 0-0-0! 2. Le4 Txd6 3. Sg4 Tf6#
play all play one stop play next play all
Cook: 1. dxe3ep 0-0-0 2. Lf5 Txd6 3. Sf3 Td4#
not
1. dxe3ep Td1? 2. Lf5 Txd6 3. Sf3+ ?? usual AP try and also check Bl 3rd move
Henrik Juel: The missing black man is dark-squared, so last move was not fxe4. In the solution Td6 should read Txd6. There seems to be a 'variation': 0... dxe3ep 1.0-0-0 Le4 2.Txd6 Sg4 3.Tf6#, so maybe the stipulation should have 1.1;2.1;1.1 added. (2004-09-23)
A.Buchanan: Well spotted Henrik. Your kindness is legendary, but in the harsh world of helpmates, this counts as a cooked I believe. In fact, it's the 2.Lf5/3.Sf3 version which is the cook. Yours is the actual solution! This is because 3.Sf3 would check if White hadn't castled, and we want the castling to be because of the AP condition only, not for 2 reasons, which one might term a "logical dual". The problem can be trivially fixed by sticking sSe5 on f6. I have no idea whether it's a typo or a cook: WinChloe has the same diagram, and the same confusion between cook & intended solution. The fact that AP does not appear in the stipulation might be a factor. WinChloe as far as I can see has no concept of AP as a keyword, and just picks it up based on a substring of the stipulation. In other compositions, T.Petrovic wasn't shy of flashing the AP acronym in the stipulation, but as usual the detective work peters out in the absence of primary records. (2020-12-08)
more ...
comment
Keywords: En passant as key, Castling (wg), a posteriori (AP), Superseded by (P1382802)
Genre: h#, Retro
Computer test: Popeye v4.85 + retro thinking
FEN: 1n1r4/p1B4p/1p1p4/p3n1p1/3pPk2/3b4/pr5q/R3K3
Reprints: (60) Problem 144-147 12/1971
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2020-12-09 more...
4 - P0003431
Tomislav Petrovic
(XIV) Problem 37-40 09/1952
P0003431
(8+14) cooked
h#3
1. cxb3ep+ c3 2. Ld3 Tg4+ 3. Kh1 0-0-0#
play all play one stop play next play all
paul: White captures was axb and g2xh3, so the retro move c3xb4 is not possible. If b3-b4, the retro check is not justified. So last move was b2-b4 (preceded by Rc3-a3). (2011-08-06)
A.Buchanan: There's a lot to unpack here. Firstly, the intended solution has a definite transposition dual in the order of Black's 2nd & 3rd moves. Second, the pawn capture count is wrong. What happened to the original wBh, given sBh2 never left the h-file? Thirdly, and not a showstopper, White's only solution involves castling: so that's a logical dual. (2020-12-08)
more ...
comment
Keywords: En passant as key, Castling
Genre: h#, Retro
Computer test: Popeye v4.85 + retro thinking
FEN: 3r3n/p7/pp6/bP1q4/RPp5/r3p2P/p1P1P1kp/Rb2K3
Reprints: (61) Problem 144-147 12/1971
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2021-05-02 more...
5 - P0004192
Tomislav Petrovic
(IX) Problem 37-40 09/1956
P0004192
(14+8) C+
h#2*
1. ... dxc6ep 2. dxc3 Lxb6#
1. dxe3 Sd4 2. e2 Sc6#
play all play one stop play next play all
more ...
comment
Keywords: En passant as key, Interchange (Sb)
Genre: h#, Retro
Computer test: HC+ Popeye v4.87 & trivial retro-logic
FEN: B5Rr/k4pPp/1p3P1p/1KpPP2N/2Pp4/2PPB3/2P1N3/8
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2021-10-23 more...
6 - P0519781
Tomislav Petrovic
Problem 41-44 03/1957
4. Platz
BiH - Macedonien
P0519781
(14+10) C+
h#2*
*) 1. ... dxc6ep 2. dxc3 Lxb6#
1) 1. dxe3 Dxg7 2. Kxb7 Dxd7#
2) 1. Lxb7 Sc6+ 2. Ka8 Sc7#
play all play one stop play next play all
pawns history:
Bl: axb,exd,f=
Wh: hxgxh,gxh,fxgxh,cxd,a=,e=
All accounted for.
Bl can't uncapture axb or exd else block promotion.
If WTM, Bl just played c7-c5 so ep is on
A.Buchanan: WinChloe doesn't think this problem is cooked at all. It says there are two full solutions, with "Echange de place de pièces noires entre les positions finales" i.e. Kb7 La8 vs Ka8 Lb7. WinChloe does not cover the (single) set play. Must the number of set plays normally match the number of full solutions? I will mark this problem HC+ uncooked. (2021-10-31)
comment
Keywords: En passant as key, Sacrifice of white pieces
Genre: h#, Retro
Computer test: HC+ Popeye v4.87 + simple retro logic.
FEN: bN6/kB1p2p1/Np1P4/1KpP3P/1prp3P/1PQRB2P/2R4p/8
Input: Hans-Jürgen Schäfer, 1997-10-11
Last update: A.Buchanan, 2021-10-31 more...
7 - P1000901
Tomislav Petrovic
3 feenschach 137, p. 340, 08-09/2000
Zdravko Maslar gewidmet
P1000901
(14+8) C+
s#2
1. dxc6ep!
1. ... dxc6+ 2. Lxc6 Sc7#
1. ... d6 2. d5 Sc7#
1. ... d5 2. exd5 Sc7#
1. ... dxe6 2. e5 Sc7#
1. ... gxf6 2. Sf5 Sc7#
1. ... g6 2. Lxg6 Sc7#
1. ... g5 2. Sg4 Sc7#
1. ... gxh6 2. Lh5 Sc7#
play all play one stop play next play all
James Malcom: This is a most excellent problem! En passant as the key and a double pickaninny in a short s#2 is surely no easy feat, I'd say. Now, question: Why can't dxc5 be Black's last move? The illegal retraction od b6-b7 is already quite obvious. (2020-10-24)
A.Buchanan: R: 1. cxb6/dxc5? both imply 3 pawn captures by Bl (2020-10-24)
A.Buchanan: I agree this is a beautifully integrated composition (2020-10-24)
more ...
comment
Keywords: En passant, Pickaninny (2x), En passant as key, Grab
Genre: Retro, s#
Computer test: C+ Popeye 4.61 after retro-analysis shows that last move was c7-c5
FEN: n2RB3/k2p2pR/Pp2PP1N/bKpP4/PpNPP3/1P6/8/8
Input: Gerd Wilts, 2000-10-08
Last update: A.Buchanan, 2020-10-25 more...
8 - P1066823
Tomislav Petrovic
The Ural's Problemist 04-06/2004
2. Thematurnier
4. ehrende Erwähnung
P1066823
(10+4) cooked
s#6
1. hxg6ep Kh5 2. Dg4+ Kh6 3. Dh5+ Kxh5 4. g4+ Kh6 5. f4 fxe6+ 6. dxe6 hxg6#
play all play one stop play next play all
Cook: Retro logic doesn’t work
(As well as major dual)
So unsound
SCHRECKE: Konnte zuletzt nicht auch 0. ... Kg7-h6 geschehen sein? (2021-02-15)
A.Buchanan: I think the diagram must be wrong. Not only does the retro logic fail, but also there is a dual 2. Df3+,Dg4+. It's not in WinChloe. (2021-02-15)
Mario Richter: An additional white Pawn e7 would justify the epkey, but not prevent the mentioned dual. (2021-02-16)
VL: We might shift wPf2 to f3 against the dual. Or exchange Bf6 with Pf2 and add wP on f3 (instead of e7)... (2021-02-16)
A.Buchanan: Shifting wBf2 to f3 leads to short cook solutions 1.Dh2. However I think 8/5p1p/4NB1k/3PPKpP/4P3/8/5PP1/2Q5 fixes the retro issue, and it's C+ by Popeye, with still ideal mate! The composer Tomislav Petrovic is still alive but would be very old (90). Is he still active? (2021-02-17)
A.Buchanan: By the way, if you query for k='foo', that will always return uses of the keyword "foobar". It's just checking for the prefix. If you omit k='foo', then that will also block "foobar". Therefore if we tag with "en passant as key", then we should not tag with "en passant" too. Both keywords should exist, and over time we may refine uses of "en passant" to be more precise.
Because of the sensible way prefixes are handled in PDB, this is a different situation from tagging a problem as both "ceriani-frolkin" and "prentos", which we should do.
On this general subject, when counting instances within a single problem, we should always use Gerd's excellent mechanism of parameters "foo:1" etc, rather than having separate keywords "foo 1", "foo 2" etc. Otherwise the set of keywords becomes unmanageable. (2021-02-17)
more ...
comment
Keywords: En passant as key, Ideal mate, Superseded by (P1386589)
Genre: Retro, s#
FEN: 8/5p1p/4PB1k/3PPKpP/4PQ2/8/5PP1/8
Input: Frank Müller, 2004-11-01
Last update: A.Buchanan, 2021-02-18 more...
9 - P1072281
Werner Keym
Tomislav Petrovic

Hannoversche Allgemeine Zeitung 1999
P1072281
(4+3) C+
h#1.5
AP
1. ... cxb6ep 2. 0-0-0 b7#
play all play one stop play next play all
Very elegant representation of the AP principle: that later castling can demonstrate the permissibility of an earlier en passant. Werner Keym himself established in the Codex that the stipulation should be annotated with AP.
more ...
comment
Keywords: En passant, Miniature, a posteriori (AP)
Genre: h#, Retro
Computer test: HC+ Popeye 4.61 together with elementary reflection
FEN: r3k3/8/N1P5/KpP5/8/8/8/8
Reprints: (A2) Problemkiste (169), p. 6, 02/2007
Input: hpr, 2007-03-04
Last update: A.Buchanan, 2021-10-31 more...
10 - P1072354
Tomislav Petrovic
(H17) Problemkiste 165, p. 214, 06/2006
P1072354
(5+1) C+
h#2.5
1. ... c3+ 2. Kxa4 Lb5+ 3. Ka5 b4#
play all play one stop play next play all
Letzter Zug: Ka5-b4
A.Buchanan: A small group of similar problems forces some short Round Trip across past and forward play. The last move is not uniquely defined (it may be a capture) and is not mentioned in the stipulation. However the genre includes retro. This means that an aesthetic criterion (e.g. existence of Round Trip) can define whether a composition is subject to 50 move rule or dead position rule! (2021-10-31)
comment
Keywords: Pure Round Trip (k), Miniature, Rex solus
Genre: h#, Retro
Computer test: (Popeye WINDOWS-32Bit V4.05 (1708292 KB))
FEN: 8/8/2K5/8/PkB5/8/1PP5/8
Input: hpr, 2007-03-14
Last update: A.Buchanan, 2021-10-31 more...
11 - P1201821
Tomislav Petrovic
Problemkiste 1989
P1201821
(3+6)
ser-s#46
1. Kf2 2. Ke3 3. Kf4 4. Kg5 5. Kh4 6. Kh3 7. Kxh2 8. Kh3 9. Kh4 10. Kg5 11. Kf4 12. Kxf3 13. Kg4 14. Kh5 15. g4 16. g5 17. g6 18. Kh6 19. Kg7 20. Kf8 21. g7 22. g8=D 23. De6 24. Kf7 25. Kf6 26. Ke5 27. Dd5 28. Kd4 29. Kc5 30. Dc6 31. Kb6 32. Kb7 33. Kb8 34. a8=D 35. Dab7 36. Ka7 37. Kb6 38. Kc5 39. Dd5 40. Kd4 41. Ke5 42. De6 43. Kf6 44. Kf7 45. Kf8 46. Df6+ Txf6#
play all play one stop play next play all
Anton Baumann: C+ Gustav 4.2a (2021-11-29)
comment
Keywords: Series mover, Move Length Record
Genre: Fairies
FEN: 3k4/P2p4/3r4/8/8/5bP1/7n/4K1r1
Reprints: 187 398 Zuglängenrekorde im Serienzüger 2003
Input: Frank Müller, 2011-09-03
Last update: Erich Bartel, 2011-11-16 more...
Show statistic for complete result. Show search result faster by using ids.

https://pdb.dieschwalbe.de/search.jsp?expression=COMMENTDATE%3E%3D20200919+AND+NOT+K%3D%27Hilfsr%C3%BCckz%C3%BCger%27+AND+A%3D%27Petrovic%2C+Tomislav%27

The problems of this query have been registered by the following contributors:

Gerd Wilts (6)
Hans-Jürgen Schäfer (1)
Frank Müller (2)
hpr (2)