Wednesday, 1 November 2017

Study 131

Árpád Rusz
Selivanov-50 JT
3rd Prize

White wins

1. d7 Nd5! 1... Ba4 2. Nc6! +-; 1... Bf5 2. Ne6! +- 2. Ne6! Thematic try: 2. Nc6? Nc7+ 3. Kb6 Ne6 (position X') 4. Nd4! Ba4! = 2... Nb4+ 3. Kb6 Nc6!

position X

position X'

If we compare Position X with Position X' from the thematic try, it appears like the two knights were "repainted". This is the only difference between the two positions so the study features the WCCT-10 Theme in an original way!

4. Nd4! 4. Kxc6? Ba4+ = 4... Bf5! Black goes for a stalemate trap! 4... Nd8 5. Nxc2 +- 5. Nxf5 5. Nxc6? Bxd7 = 5... Nb8! 6. d8=B! +- 6. d8=Q? stalemate

The end position has a white bishop and knight vs. a black knight, while in the initial position of the study there was a white knight vs. black bishop and knight. It looks like during the game, paradoxically, all minor pieces were repainted!

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Marius Mika said...

Good work Arpad. Congratulation!
A similar underpromotion is present in one of my little works, and was published in Sinfonie Scacchistiche - 129 ( July 2017- diagram 451 ), but any conflict should be avoided since your scheme is sufficiently different.
Anyway, the study was released in 31 May 2017, in parallel with the your, but in a informal tourney.
Mario Micaloni

Árpád Rusz said...

Thank you, Mario!
I haven't seen your study yet. Can post it here?
The bishop underpromotion is known from some older studies like:

Hannemann (1949) wKh6,Ne3,Pe7/bKh8,Ne8 +-
1... Nf6 2. Kg6 Ng8 3. e8=B! (3. e8=Q?) etc.

Lukashev (1974) wKa6,Nd3,Pd6/bKa8,Na7 +-
1. d7 (with cooks) 1... Nc6 2. Kb6 Nb8 3. d8=B! (3. d8=Q?) +-

Marius Mika said...

Of course, even if it is not exceptional.
It simply realizes the mutual zugzwang by pushing the pawn by 1 or 2 steps, according to the knight movements.
W: Ka5-b5-f2-f6
B: Kd8-Nh3
Black on move and White win.
2.b6 and now:
Main A: 2....Nh7
3.f7 Nf8
4.b7 Kc7
5.Ka6 Kb8
6.f3! Nd7
7.f4 Nf8
8.Kb6 Ne6
9.f5 Nd8
10.f8=B! and win

Main B: 2....Nf7
3.b7 Kc7
4.Ka6 Kb8
5.f4! Nd8
6.Kb6 Ne6
7.f5 Nd8
8.Kc5 Nxb7
9.Kd5 Nd8
10.Kd6 Kc8
11.Ke7 Nc6
12.Ke8 Ne5
13.f7 and win

simple and effective 😎

Árpád Rusz said...

Really cute!
I would have started the study with a white move (1.b6). I see the BTM stipulation as an imperfection and I always try to avoid it.

Marius Mika said...

You're definitely right. Actually I'm an O.T.B. player, and altough I'm not young anymore, I've just started composing. Sometimes, if i do not see any improvement right away, I'll settle and send the job as it is.
In this case I eliminated White's initial moves with dual or captures, but actuallybit was enough to start with 1.b6!.
Thanks for suggestions.
In a short time I will certainly do better.