Originals
Vol II, No.15, Autumn 1997

13-14:
#2
#3,n
h#2
h#3,n
s#2,n
15:
#2
#3,n
h#2
h#3,n
s#2,n
16:
#2
#3,n
h#2
h#3,n
s#2,n
17-20:
#2
#3,n
h#2
h#3,n
s#2,n
21-24:
#2
#3,n
h#2
h#3,n
s#2,n

Original Helpmate Twomovers

331. Tomislav Petrovic
Yugoslavia







h#2 W--> (0111) 9+15
1... bc6(ep) 2.gf1B 0-0-0# (2... Rd1?, 2.Rd5?)

Valadao theme in h#11/2 - task! White must castle in order to prove a posteriory that niether WK nor WRa1 has moved. [Author] Alas...

Problem 331 by Tomislav Petrovic, in Mat Plus, No. 15, Autumn 1997 is incorrect. Black pawns captured all seven missing white men, including the white f- and h-pawns after they promoted on f8 and h8. White captured c6xQb7. Black has just moved, but his last move need not have been c7-c5; one may also retract, for example
-1... Ne8-d6
-2. c6xQb7 d5xRc5
-3. Rh5-c5 Ke4-d4
-4. c5-c6 Rd4-c4
-5. c4-c5 c5xNb4
In this explanation of the previous play, the original black c-pawn stands on b4 in the diagram, and it captured before the white c-pawn advanced. The white king and a-rook need never have moved, just as in the intended play, where the original black c-pawn never captured. It is impossible to prove that an en passant capture is allowed in the diagram position; therefore it is not allowed, and the problem has no solution. This is a shame, because the idea of featuring the Valladao theme in the three single moves of a H#1.5 is very good and probably original. [Henrik Jeuel]

Theodor Tauber forwarded the e-mail message by Mr. Gianni Donati from USA: I saw there a h#1.5 by Petrovic (a coincidence? - is this Petrovic related to the famous Nenad of similar problems from long ago?) where e.p. capture is subsequently legalized by White castling. It struck me that the stipulation did NOT say "A.P." or "a priori." I have been told stating "a priori" is required, and in fact I think I have seen this stated in FIDE rules. I wonder whether there is an exception for help-type problems (as opposed to direct mates and studies) or whether there has been a change of attitude, or even whether MatPlus is simply independent on this point. I ask because I find the requirement of adding "A.P." to the stipulation to be annoying. Granted, adding "A.P." often doesnt give a big hint because it will be obvious that e.p. capture and castling will be the point of the problem. But stating "A.P." is inartistic at best, and it makes it impossible to make tidy twinning in problems in which one part has a priori reasoning and the other part is normal. I have made two such problems (a H#2 and a SH#6), and I cant publish them because I am told that the retro part has to have "A.P." in the stipulation!


332. Newman Guttman
USA







h#2 3111 3+3
1.Rd5 Kg4 2.Ke5 Qe7# (1.Ke5? - self interference)
1.Rc5 Kf4 2.Kd5 Qd7# (1.Kd5? - self interference)
1.Rb5 Ke4 2.Kc5 Qc7# (1.Kc5? - self interference)

This helpmate is a trifle strategically, but perhaps showing three exact-echo tries in a miniature. [Author]


333. Victor Chepizhny
Russia







h#2 2111 3+7
1.Rc4? ? 2.Rc7 Sc6#
1.Re4? ? 2.Re7 Sa6#
1.Qh4? Ke3: 2.Qe7+ ?
1.Qc3? Kg3 2.Qc7+ ?

1.Qb4 Kg3 2.Qe7 Sa6:#
1.Qa5 Ke3: 2.Qc7 Sc6#

One of the finest examples to prove that try-play should be noticed in helpmate too. Here it means six instead of two phases, with perfect analogy, achieved by very simple means. So, do not rely only on solutions shown by computer! [Marjan Kovacevic]

Those who saw Mat Plus Web Site on Internet will notice that meanwhile author sent new position which he considers a more interesting realisation of the idea. [Milan Velimirovic]

White tempo moves strategy.The tries fail by checks or lack of white tempo moves. [Mario Parrinello]


334. Vito Rallo &
Antonio Garofalo

Italia







h#2 b) BBd2-->d4 4+6
a) 1.Ree6 Rg1 2.Se3 Rg5#
b) 1.Se5 Rc6 2.Bb6 Rf6#

Two analogous solutions with black-white line clearence in first followed by black interference in second move. Good construction ironically emphasises the presence of BP only as a cook-stoper in position (a). [Milan Velimirovic]

Line-opening and -closing. [Mario Parrinello]


335. Mihailo Stojnic
Yugoslavia







h#2 3111 4+8
1.Re4 Rg5+ 2.Kf4 Bd2#
1.Ke5 Bc7 2.Rf5 Re8#
1.Qg5 Bd2 2.Kg4 Rf4:#

Cyclic functions (pin, guard and mate) of three white pieces in light position, but without depth in strategy. I heard the rumour that this young author, since he felt the benefit of the computer, decidet to compose only helpmates?! For the composer of Super-Vladimirov (published in previous issue of Mat Plus) this sounds impossible! [Milan Velimirovic]

Cyclic change of functions of three w pieces:pin, guards, mate.

The following versione saves a pawn and has a knight instead of a rook: W: Kb7 Ra1 Rg5 Bg4; Bl: Kb4 Qa5 Rb5 Sd3 pb6 pd4 pb3 3.1.1.1 [Mario Parrinello]


336. Gyorgy Bakcsi &
Laszlo Zoltan

Hungary







h#2 b) WPf6-->d6
+c) WBc4-->g4
+d) BBe8-->h1
6+6
a) 1.ef6 Sgf4 2.f5 Bd5#
b) 1.ed6 Se1 2.d5 Bd3#
c) 1.Bb5 Sh4 2.Bd3 Bf3#
d) 1.g5 Se3 2.Bf3 Bf5#

An ABCD-BCDA change between the f5-d5-d3-f3 fields. [Author]

One can recognize a typical Bakcsis touch: clear, economical and interesting. [Milan Velimirovic]

I suggest the following more economic version: remove Re2, Se6 to e2 and add a white pawn on e6. [Mario Parrinello]


337. Michael McDowell
Great Britain







h#2 2111 6+7
1.Re5: Rc3 2.Be4 Be5:#
1.Bd3: Bd6 2.Re4 Rd3:#

This unusual virtual Grimshaw on e4 is really used only for the determination of two black moves. [Marjan Kovacevic]

Anticritical moves around e4; interesting black strategy, much less the white one.The following version achieves a Meredith position: W: Kf2 Ra3 Sd3 Se5 pc5 pc6 pe6; Bl: Kd4 Re1 Bh7 pd5. [Mario Parrinello]


338. Franz Pachl &
Markus Manhart

Germany







h#2 4111 6+7
1.Rg5 Bd2 2.Rg6 Sd5#
1.Bf5 Re2 2.Bg6 Sg4#
1.Ke5 Ba3 2.Kd6 Sc4#
1.Kg5 Rh1 2.Kh4 Sg2#

This is a teamwork, composed on telephone. There are always two thematic pairs with 4 mates by the white knight, perhaps a Letztform. [Author]

Four indirect battery mates by the same piece. [Mario Parrinello]


339. Semion Shifrin
Israel







h#2 b) BQf3-->g8 (-BSg8)
+c) BQg8-->a1
7+6
a) 1.R2d5 Ra8 2.Ke4 Ra4# - Ab
b) 1.Qe6 Sf8 2.Ke5 Sg6# - Bc
c) 1.R6d4 Se5 2.Ke3 Sd3# - Ca

Cyclic functions of three black pieces. The first function is: a thematic piece closes both one black and one white line and becomes self-pinned by BK move (A, B, C). The second function: a thematic piece blocks the flight (a, b, c). The BK is mated on squares which are initially double guarded by white. [Author].

The line-closing after 1.Qe6 is impure,in fact we can replace Rd6 (which must remain on d6 to block) by a black pwan (C+) without altering the solution. [Mario Parrinello]


340. Colin Sydenham
England







h#2 duplex 7+9
B-->: 1.Sd5: Bd4 2.Sc3 Be3#
W-->: 1.Sc3: Rc5 2.Sd5 Rc1#

Mutual captures, switchbacks, pin-model mates. [Author]

Colin is still the one who finds genuine duplex-mechanisms. In this case of perfect analogy, the key-moves strategy makes the essence of the unification. [Marjan Kovacevic]

One of the most satisfactory Duplex. [Mario Parrinello]


341. Leonid Makaronetz &
Semion Shifrin

Israel







h#2 b) BSc3-->f3
c) WPg5-->f6
6+11
a) 1.Sb5 Se4 2.Ke6 Sf6#
b) 1.Sd2 Rg3 2.Ke5 Rd3#
c) 1.Bg2 Re5+ 2.Kd6 Rh5#

Black interference in first, white temporary interference in second halfmove, and white-black interference in matting move, but this one regretfully only in first and third position. [Milan Velimirovic]

Three anticipatory interferences and battery creation.The following version saves a black bishop: remove Bf8, pa7 to c7. [Mario Parrinello]


342. Vyacheslav Kopaev
Russia







h#2 b) BKc1<-->WRe2
c) BKc1-->c3, BBe4-->g8
6+11
a) 1.Rd1 Rdd2 2.Rd3 Rc2#
b) 1.Rd2 Rd3 2.Rd4 Re3:#
c) 1.Rd3 Rd4 2.Rd5 Rc4:#

Loshinski theme with three pieces. [Author]

Interesting task - can it be done without twins? [Milan Velimirovic]

Another Loshinski theme by Kopaev; pity for the poor third twin. [Mario Parrinello]


343. Mitja Ukmar &
Marko Klasinc

Slovenia







h#2 b) WRc7<-->BRe6
c) WRc7<-->BRc6
d) WRe7<-->BRe6
e) WRe7<-->BRc6
3+15
a) 1.Bc8 Rh7 2.Ke8 Rh8:#
b) 1.Kc8 Rh6 2.Bf5 Rh8:#
c) 1.Bc8 Re6: 2.Kd7 Rcd6:#
d) 1.Be8 Rc6: 2.Kd7 Red6:#
e) 1.Bc8 Rc5: 2.Sd7 Rc8:#

A bizzare twinning with all possible exchanges of white and black rooks. [Milan Velimirovic]


344. Zivko Janevski
Macedonia







h#2 3111 9+11
1.Qd5 Rg5:+ 2.Ke4 Qa4#
1.Qd4 Bd7 2.Kd5 Qa5#
1.Qe4 Rc3 2.Kd4 Qh8:#

Anticipatory self-pins with cyclic arrival squares for BQ and BK - shown for the first time. In addition, cyclic functions of WB and two WRs. All mates by same white piece (WQ). [Author]

Very good task. [Mario Parrinello]


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