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MatPlus.Net Forum Competitions Add-a-Year 65 JT 2022 (#2)
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(1) Posted by Marjan Kovačević [Friday, Apr 8, 2022 22:57]

Add-a-Year 65 JT 2022 (#2)

After positive reactions from around 20 solvers to Add-a-Piece competition, here is something for fun and entertainment of composers:
You can use this thread for possible questions, or write to
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(2) Posted by Hauke Reddmann [Saturday, Apr 9, 2022 10:29]

Is it OK if the problem has two solutions (in the sense of
the ECSC twin example, of course!), i.e., a piece can
be added in two places to give a correct problem?
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(3) Posted by Miodrag Mladenović [Saturday, Apr 9, 2022 10:38]

I think it should be listed as 2 or "N" solutions instead of twins.
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(4) Posted by Marjan Kovačević [Saturday, Apr 9, 2022 12:24]

Yes, Hauke, it is not forbidden, and if the contents of the twins would be somehow connected, it might turn into plus.
If another twin is obvious "cook" the author couldn't avoid, that would be a minus.
I prefer to use the term twin-solutions (in fact 2 such positions function as the real twins!).
Mentioning only "solutions" might be misleading to the solutions after the pieces were added.
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(5) Posted by Miodrag Mladenović [Saturday, Apr 9, 2022 14:18]

Using twins is OK but I must admit that I've been confused at first. Your examples 1 & 2 are almost like a twins b) wQf2 = wRf2. So it would be very confusing if someone creates twins with a twins. Then it will be something like "twins with twins" and it would be very confusing too.
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(6) Posted by Siegfried Hornecker [Saturday, Apr 9, 2022 16:03]

It should be noted that the example is limited to only white pieces (like on the page where you get to by clicking above the diagram).
Otherwise, the Anirudh problem is very much cooked by adding anything by Black on f3 to f6.
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(7) Posted by Marjan Kovačević [Saturday, Apr 9, 2022 16:50]

Siegfried, true, one has to use hyperlink above the diagram to see the exact demand. The possible cooks you mentioned were exactly the reason for the composer to specify "Add a white piece".
As for the difference between orthodox twins (1 & 2), and twin-solutions (3), I guess all should be clear when you take look at Example 3 with a) & b) twin-solutions.
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(8) Posted by Marjan Kovačević [Saturday, Apr 9, 2022 23:15]

Thanks, Siegfried, the example in the announcement completed.
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(9) Posted by Siegfried Hornecker [Sunday, Apr 10, 2022 00:10]

Marjan, I had misunderstood the tourney at first and created the wrong problem.

So as an apology for missing your birthday, I want to offer it in this thread. I hope it is correct.

For Politika's best chess columnist
(= 7+4 )

Add a piece, then #1

Solution (mark this line for the try, next line for the actual solution): Try: +wRa1, then 1.0-0-0 mate. But castling is illegal (bK must have passed through e1).
Solution: +wNf1, then 1.Ng3 mate

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(10) Posted by Marjan Kovačević [Sunday, Apr 10, 2022 14:16]

Thanks, Siegfried!
Your dedication words might be correct now that I'm the only (and half-retired) chess journalist in Politika :).
During the last 100 years, our chess column (founded 15.02.1922) had several very important chess columnists, starting from Jakov Ovadija and Ozren Nedeljković.

Your problem illustrates a nice but not thematic try. For this QCT thematic tries should fail only because added piece produces more than one solution. Strictly thematic are the tries with 2 solutions instead of 1, but the tries with several cooks may contribute to the quality, especially if all the cooks are based on one and the same reason.
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(11) Posted by shankar ram [Sunday, Apr 10, 2022 15:19]

Some famous miniature two movers can be immediately converted for this TT by removing a piece:
E.B.Cook, American Chess Nuts, 1868: WKc2, WPg7; BKa1. #2. Remove WPg7 and make the stipulation "Add a white piece for a correct #2 a) & b) twin-solutions".
Similarly, John Dell, The Ladies Diary, 1830: WKf6, WPf7; BKh7. #2. Remove WPf7 and make the stipulation "Add a white pawn for a correct #2".
I suppose such "entries" would be considered as anticipated?
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(12) Posted by Hauke Reddmann [Sunday, Apr 10, 2022 16:24]

My personal opinion is that we could benefit from a "terminus technicus"
for problems that clearly build upon older material, but are not
strictly anticipated (random recent MPF example: Andrew Buchanan and his 42
drawing moves with the fresh idea of using "dead", based very
much on the position of T.R.Dawson). I would not term it "anticipated"
but..."inspired?" Nevermind. That's the onus of the tourney judge anyway.
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(13) Posted by Marjan Kovačević [Sunday, Apr 10, 2022 19:44]

Glad you put this question, Shankar!
I believe a composer should write "after XXX", and I wouldn't consider it anticipated.
I've played around with many miniatures this way, but at the end I concluded the genuine thematic problems are easier to construct when starting from empty board and thematic tries.
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(14) Posted by Marjan Kovačević [Sunday, Apr 17, 2022 00:25]

Solutions to the examples, some thematic tries, additional explanations, and correction of No.4:
Just to make it clear: composing tourney is for direct #2s only.
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(15) Posted by Marjan Kovačević [Tuesday, May 17, 2022 23:59]

The final award:
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(16) Posted by Marjan Kovačević [Friday, May 20, 2022 13:55]

And with corrected version of one solution:
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(17) Posted by Thomas Maeder [Friday, May 20, 2022 18:34]

Some interesting problems!

I like how you wrote the stipulation of the 3rd prize - if only adding peace were as easy!
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(18) Posted by Marjan Kovačević [Thursday, May 26, 2022 01:08]

Thanks, Thomas!
Another solution has been corrected, this time in an intriguing way.
Take a look how retro play has changed the solution of No.23:
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(19) Posted by Hauke Reddmann [Thursday, May 26, 2022 08:42]

The award still can be corrected? In that case, please
add a piece to my name in "Contributors" :-)
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(20) Posted by Marjan Kovačević [Thursday, May 26, 2022 14:08]

Easy puzzle this time, not only what piece should be added ("d"), but also on what square.
Thank you for the nice and clear contribution, it was a real pleasure to analyze all the entries!
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MatPlus.Net Forum Competitions Add-a-Year 65 JT 2022 (#2)