Showing posts with label __#n. Show all posts
Showing posts with label __#n. Show all posts

Tuesday, June 15, 2021

An International TT with Theme Pergialis, Cup of Bucovina 2020

The Last composer of Rebetico songs, Nikos Pergialis (28.02.1931 - 04.12.2019), would be pleased with today's post.

Some biographical elements you may find here: 
https://chess-problems-gr.blogspot.com/2008/09/nikos-pergialis.html

I had proposed in June 2016 the theme Pergialis, which I had described here:
https://chess-problems-gr.blogspot.com/2016/06/proposal-for-theme-pergialis.html

Today I present the Award (01/06/2021, Judge: Mario Guido Garcia) of an Iternational Thematic Tourney for chess composition (Cup of Bucovina 2020), which was focused on Theme Pergialis with great success. 

https://drive.google.com/file/d/1ImQQ9qkJLMpPjBYYIKmVYtbhQ-iW5SJF/view?usp=sharing

Many thanks for organizers and participants.

Wednesday, April 01, 2020

A well-timed problem, in CoVID19 times

We present today a well-timed problem by Nikos Mendrinos, awarded Greek solver, champion and new composer.

Condition: Because of the corona virus CoVID19 … the pieces must be kept in a distance from each other!
The condition is known as Anti-ContactChess or Anti-koko.

Problem-839


FEN: 4k3/b7/4S3/2q4s/K7/2p2Q2/8/1R6
#2, (4+5)
Nikos Mendrinos (GRE)
original

White plays and mates in two moves

Fairy condition:
Anti-koko


Condition Anti-koko: The moves, where one piece goes near another piece as in 1.Ka4-b3 or 1.Qf3-a8+ or 1...Qc5-a5+ or 1…Ba7-b6, are not legal and are prohibited.
The capture of a piece, as 1.Qf3xh5+, is allowed.

Tries:
{1.Qh1? / Qg2? Sg7!}, {1.Qxh5+? Qxh5!}, {1.Rg1? Sg7!}, {1.Re1? Bb8!}

Key: 1.Qe4! (waiting)
1…Sg7 2.Sc7#, 1…Sg3 2.Qg6#
1…Qc8 / Qc7 2.Sg7#, 1…Qc6+ / Qg1 / Qf2 2.Q(x)c6#
1…Bb8 2.Rxb8#

The white battery, constructed with wQ and wS with the key, can be opened giving double check. The defence of the black pieces is very limited by the Anti-koko condition.


Sunday, January 08, 2017

4th Greek Cup, problems, solutions, results

The 4th Greek Cup in solving chess problems took place today 08/01/2017.

Mr Nikos Mendrinos had the general responsibility for the event and the selection of problems.

The Problems
https://drive.google.com/file/d/0B2-Lv0IlDIs6d05uYVZpQktieUE/view?usp=sharing

The solutions with comments
https://drive.google.com/file/d/0B2-Lv0IlDIs6U1NvLVJYZ3JuZjg/view?usp=sharing

The results (23/01/2017):
https://drive.google.com/file/d/0B2-Lv0IlDIs6ZFIxa3J4VTFVRzA/view?usp=sharing

Press release
https://drive.google.com/file/d/0B2-Lv0IlDIs6akRISDVBTFVZN1E/view?usp=sharing

Photo from Aegaleo, Athens


Monday, October 31, 2016

15th Greek Solving Contest

The contest was held in parallel in Athens and Patras.

The problems were selected by Ioannis Garoufalidis.

Problems :
First Round. https://drive.google.com/file/d/0B2-Lv0IlDIs6akY1TWtJQk00Um8/view?usp=sharing
Second Round. https://drive.google.com/file/d/0B2-Lv0IlDIs6RF9rRU9TdGdFRGM/view?usp=sharing

Solutions :
First Round. https://drive.google.com/file/d/0B2-Lv0IlDIs6amVnWDFkTGVfZ00/view?usp=sharing
Second Round. https://drive.google.com/file/d/0B2-Lv0IlDIs6QXhncENLM2NiMGc/view?usp=sharing

Resultshttps://drive.google.com/file/d/0B2-Lv0IlDIs6dWVMVHpHZDNPX1k/view?usp=sharing

Solvers who participated :

01. Sidiropoulos N
02. Papastavropoulos A
03. Mendrinos N
04. Konidaris P
05. Masouros P
06. Anemodouras L
07. Skyrianoglou D
08. Fougiaxis H
09. Spiliadis A
10. Manolas E
11. Pountzas C
12. Petridis E
13. Kollias I
14. Moutzouris I
15. Vlachos E
16. Kalyva K
17. Vaggopoulos A
18. Christodoulou S
19. Aggelis P
20. Christodoulou G

Wednesday, October 05, 2016

Playing with Composition

In this post we will start from a nice miniature by our friend Nikos Pergialis and we will enhance it with more variations.
A miniature has up to 7 pieces.
Adding pieces to it, the problem will not be a miniature anymore, which was a limiting factor for old chap Nikos, but it will get more variations, which is my goal.


Problem-825
Nikos Pergialis (GRE)
8/8/8/rS6/3b4/1Q6/p1K5/k7
(3 + 4)
#2
Try : {1.Qb4? [2.Qe1# / Qxd4#], 1…Bb2 2.Qxb2#, 1…Bf2 / Be3 2.Qb2# / Qc3#, 1…Bc3 2.Qxc3#, 1…Rxb5!}

Key : 1.Sc3! [2.Qb2#],
1…Bxc3 2.Qxc3#,
1…Rb5 2.Qxa2#

The key is quasi-sacrificial. It closes one line allowing one mate, and also supports the wQ for the second mate. There are three mates in total.

The pieces are relocated two columns to the right.
A wRb6 was added, to keep bK from escaping to the second column.
A wBb1 was added, to allow promotion of bPc2 to knight, stoping the threat. A bRa1 was need to stop some duals from occuring. When bPc2 captures, the wQ mates from square d1.
A bPe4 can capture the wQ with check, but then a wSe5 mates.
The bQ can deter the threat, but then wRh7 mates. The presence of this rook offers a try, which allows us to see the Pseudo-Le Grand theme.

Problem-826
Emmanuel Manolas (GRE) (after Nikos Pergialis)
original
7q/7R/1Rr5/3SS1b1/4p3/3Q4/2p1K3/rBk5
(7 + 7)
#2
Tries : {1.Rxh8? [2.Rh1#], 1…Bd2 2.Qxd2#, 1…Be3 2.Qxe3#, 1…Bh4 2.Qd2# / Qe3#, 1…Rxb6 / Rf6 / Rh6 2.Qxc2#, 1…exd3+ 2.Sxd3#, 1…Bh6!},
{1.Qd4? [2.Qg1# / Qb2#], 1…cxb1=Q 2.Qd1#, 1…cxb1=R 2.Rxc6# / Qd1#, 1…Rxb6!}

Key : 1.Se3! [2.Qd2#],
1…Bxe3 2.Qxe3#,
1…Rxb6 / Rd6 2.Qxc2#,
1…Qd8 2.Rh1#,
1…cxb1=S 2.Qd1#,
1…exd3+ 2.Sxd3#

The problem works with similar mechanism, as the previous one, only it has now 14 pieces and there are six different mates. 

There is also the Theme Pseudo-Le Grand : "Two threats (A, B) in two phases, reappear crosswise as mates after different black responses (a, b) in these phases".
In the present problem the relevant moves are as follows
1.Rxh8? [2.Rh1# (A)] Bh4 (a) 2.Qd2# (B), 1…Bh6!
1.Se3! [2.Qd2# (B)] Qd8 (b) 2.Rh1# (A)

Monday, June 13, 2016

13-ESSNA solving contest

13th Open Solving contest "Championship of Attiki".
It is organised by the Union of Chess Clubs Of Attiki Prefecture (around Athens, Greece).
Place : Chess Club of Aegaleo.
Time : Sunday, June 12, 17:00 - 20:00.
Judge (and program selector) : Ioannis Garoufalidis

The problems :


https://drive.google.com/file/d/0B2-Lv0IlDIs6d1F3d1U3UXY3T2c/view?usp=sharing

The solutions :


https://drive.google.com/file/d/0B2-Lv0IlDIs6ZzN4YmFnQVhMaDA/view?usp=sharing

Ranking of solvers :


https://drive.google.com/file/d/0B2-Lv0IlDIs6UGhtSGFLa0duMnM/view?usp=sharing

Photos from the event

(by Dim. Skyrianoglou)

Thursday, June 02, 2016

Proposal for a Theme Pergialis

We propose today a new theme, which will have the name of the Greek composer Nikos Pergialis.

Theme Pergialis : The wQ pins a piece, which is the only pinned black piece, and the threat is a pin-mate from another white piece. In the variations the wQ delivers at least four mates from different directions to the immobile bK, the one mate being by capturing the pinned piece.


Nikos Pergialis



Problem-818
Pergialis Nikos (GRE)
Source: https://www.facebook.com/photo.php?fbid=494095627452037&set=a.146384942223109.1073741827.100005548114972&type=3
2Qq4/1Sp1br2/8/1p1p4/2k2S2/2P5/P1K1RR2/2s5
(8 + 8)
#2


Key : 1.Qe6! [2.Re4#]
1…Sxe2 2.Qxe2#
1…Qh8 2.Qxd5#
1…Bf6 2.Qc6#
1…b4 2.Qa6#
1…Sb3 2.axb3#
1…Bc5 2.Sa5#
1…Rxf4 2.Rxf4#

Theme Pergialis. Direct pin. Pin mates (2.Re4#, 2.Rxf4#). Four mates by the wQ. Black correction (Be7-c5 corrects Be7-f6). 


Problem-819
Pergialis Nikos (GRE)

8/S1s4q/7p/KSkr2bR/3pPQ2/3PP3/8/8
(8 + 7)
#2


Key : 1.Qe5! [2.exd4#]
1…Sxb5 / Se6 2.Qxd5#
1…Bxe3 2.Qd6#
1…Qxe4 2.Qxc7#
1…dxe3 2.Qc3#

Theme Pergialis. Direct Pin. Pin mate (2.exd4#). Four mates by the wQ. Reciprocal captures (dxe3, exd4). 


Problem-820
Pergialis Nikos (GRE)

7q/s1b5/S7/1S6/K1kp1s2/R7/8/7Q
(5 + 6)
#2


Key : 1.Qe4! [2.Rc3#]
1…Qh3 2.Qxd4#
1…Sd5 2.Qd3#
1…Se2 2.Qe6#
1…Sxb5 2.Qc6#
1…Ba5 2.Sd6#

Theme Pergialis. Direct Pin. Pin mate (2.Rc3#). Four mates by the wQ. Black correction (1...Sd5 corrects 1...Se2).


Problem-821
Pergialis Nikos (GRE)

4r3/6Qp/5B2/p2p4/Ks2kSP1/4Pp2/5P2/2R4r
(8 + 8)
#2


Key : 1.Qb7! [2.Rc4#]
1…Sc2 2.Qxd5#
1…Sc6 2.Qb1#
1…Rxc1 / Rd1 2.Qxh7#
1…Rc8 2.Qe7#


Theme Pergialis.  Direct pin.  Pin mate.  Four mates by the wQ.  Anti-Dual Sc2 and Sc6.                   


Problem-822
Pergialis Nikos (GRE)

6SQ/6p1/8/2BPkp2/qS1R4/pRp4b/Ps1p2rb/KB6
(10 + 11)
#2


Key : 1.Qh5! [2.Re4#]
1…Sd3 2.Sxd3#
1…c2 2.Re3#
1…Re2 / Rg5 2.Q(x)e2#
1…Rg4 2.Qxf5#
1…g5 2.Qh8#
1…Qxb4 2.Qe8#

Theme Pergialis. Direct pin. Pin mate (2.Re4). Four mates by the wQ. Black correction (1...Rg4 corrects 1...Re2 / Rg5).

Monday, April 11, 2016

Theme Elmgren

(Initial date of this post was 21/12/2015)

In this post we will see the Theme Elmgren under a different light. This theme is named after the Swedish composer Bertil Elmgren, born 25/05/1912.

In this theme, all the black pieces (3 or more), with a possible exception of the bK, are actively refuting white tries!
A try is an attempt by the White to win, but the Black has a unique defense.
The White has at least three such tries, and all the black pieces take their turn to refute.
With more black pieces on board, the probability all of them refuting a try diminishes, making it more difficult for the composer to achieve an Elmgren.
Likewise, the more the black pieces, the more are the tries, making the problem relatively more difficult for a solver.

Having all the black pieces struggling in defense, symbolizes a common battle where no one stays behind the trenches, waiting to see what will happen!
There are no idle pieces, simply blocking a flight or stopping an unwanted second solution.
Everything is useful and active!

I have published in this blog some problems containing the Elmgren theme.

15/10/2011, Manolas Emmanuel, problem_497
http://chess-problems-gr.blogspot.gr/2011/10/manolas-emmanuel-4-compositions-from.html

16/11/2012, Pergialis Nikolaos, problem_625
http://chess-problems-gr.blogspot.gr/2012/11/nikos-pergialis-5-compositions.html

27/01/2013, Retter Yosi, problem_687
http://chess-problems-gr.blogspot.gr/2013/01/isc-9-compositions-solved-and-some.html

07/06/2014, Manolas Emmanuel, problem_771
http://chess-problems-gr.blogspot.gr/2014/06/some-two-movers-for-you-to-solve.html

27/12/2014, Manolas Emmanuel, problem_792,
http://chess-problems-gr.blogspot.gr/2014/12/farewell-to-2014.html


We shall see now some rare compositions with theme Elmgren, with at least five black pieces refuting white tries.

5 black pieces


Problem-808
Termaat Nicolaas I. J.
2nd Prize, Probleemblad 1951


1s6/SQ2pb2/1P6/P1S4R/2kp2B1/K1P2R2/1P1P4/2s5 (12 + 6)
#2

Tries: {1.Sd3? [2.Rc5#] Sb3!}, {1.Se6? [2.Rc5/Qd5#] Bxh5!}, {1.Sa6? [2.Rc5#] Sd7!}, {1.Se4? [2.Rc5#] dxc3!}, 1.Sb3? [2.Rc5#] Sd3!}, {1.Sd7? [2.Rc5#] e5!}.

Key: 1.Sa4! [2.Rc5#]
1...Bxh5 2.Be6#, 1...Bd5 2.Qxd5#, 1...e5 2.Qxf7#, 1...dxc3 2.Qe4#, 1...Sb3 2.d3#, 1...Sd3 2.b3#, 1...Sd7/Sa6 2.Q(x)a6#

Themes Option and Elmgren.


Problem-809
Burbach Johannes J.
Shakend Nederland, 1981


4Q3/8/3p4/1pp1Ppp1/4P3/RPP1kPPR/4SSP1/3KB3 (14 + 6)
#2

Tries: {1.c4? [2.b4#] b4!}, {1.b4? [2.c4#] c4!}, {1.exf5? [2.exd6#] d5!}, {1.g4? [2.f4#] f4!}, {1.f4? [2.g4#] g4!}.

Key: 1.Qxb5! [2.Qd3#]
1...c4 2.Qb6#, 1...fxe4 2.Sg4#

Theme Elmgren.


6 black pieces


Problem-810
Manolas Emmanuel (GRE)
original
dedicated to Kostas Prentos


rB6/1sK1S2P/2P2p2/1R1Pk1P1/6R1/1B4P1/6bQ/6r1 (12 + 6)
#2

Tries: {1.Sg6+? Kf5!}, {1.Bc2? [2.Sg6#] Sc5! (The square d5 is guarded by three white pieces Rb5 Bb3 Se7. One leaves making the try-move, one will leave to make mate, so the Black shuts off the third guardian : Theme Zappas simple)}, {1.d6+? Sc5!}, {1.Re4+? Kxe4!}, {1.Kxb7+?/Kd7+? Rxb8+!}, {1.Qxg1? [2.Qd4#] Be4!}, {1.Qxg2? [2.Re4#/Qb2#/Qe2#/Qe4#] Rxg2!}, {1.Qh6?/h8=Q?/h8=B? Rf1!}, {1.h8=S? [2.Shg6#/Sf7#] fxg5!}.

Key: 1.Rf4! [2.Sg6#]
1...Be4 2.Qb2#, 1...Bxd5 2.Qe2# (horizontal-diagonal transformation)

Theme Elmgren (here the bK is also refuting tries). In the phases {1.h8=S?} and {1.Rf4!} there is Anti-Dual with moves Be4 and Bxd5. (There are some more technical merits to examine: changed mates in two phases, a pin-mate, Urania, Bartolovic, Dombrovskis paradox, Anti-reversal, Anti reversal-menace).


Problem-811
Witt Andreas
Commendation, Die Shwalbe 2005


4s1R1/4p2R/4pQ2/4Bsb1/B1P4r/K2SP3/2S5/1k6 (10 + 7)
#2

Tries: {1.Bh2? [2.Qa1#/Qb2#] Rd4!}, {1.Bg3? Bxf6!}, {1.Bf4? Sd4!}, {1.Bd6? e5!}, {1.Bc7? exf6!}, {1.Bb8? Sxf6!}, {1.Rxe8? [2.Rb8#] Bxe3!}, {1.Kb3? [2.Sa3#] Sd4+!}.

Κλειδί : 1.Ba1! [2.Qb2#] (line opening Bristol)
1...Rd4 2.Rh1#, 1...Bxf6 2.Rg1#, 1...Sd4 2.Qf1#, 1...e5 2.Qb6#, 1...exf6 2.Rb7#, 1...Sxf6 2.Rb8#

Theme Elmgren. Multiple captures of the bQf6. 




Upgrade on 12-01-2016

Motivated by this post, the Italian composer Alberto Armeni decided to compose a problem with more than 6 black pieces, all refuting tries. He has initially set the record to 8 pieces, which we were glad to present here, but then he created a task with 11 pieces (see Problem-814 below).

8 black pieces


Problem-812
Armeni Alberto
International Composing Tourney "e4-e5" 2015-2016, section 2#
Source: http://www.chessplayer.ro/tourneys_2015.html (with click on the blue 24)

1s5b/3B1PP1/p4Rr1/2Bk4/3P4/1pK1R1rb/pP2PS2/2Q2S2 (13 + 9)
#2

Set play : {1...Sc6 2.Bxc6#, 1...Rxg7/g5 2.Rd6#, 1...R6g4 2.Rd6/f5#, 1...Rxe3+ 2.Sxe3#, 1...R3g4 2.Rf5# / Re5#, 1...Rg2/g1 2.Re5#, 1...Bg2/xf1/f5 2.R(x)f5#}

Tries : {1.Sxg3? [2.Re5#] Sb8xd7!}, {1.g8=S? [2.Se7#] Bh8xf6!}, {1.Kb4? [2.Re5# / Qc4#] a6-a5+!}, {1.f8=Q? [2.Qd6#] Rg6xf6!}, {1.Qc2? [2.Qxb3# / Qe4#] b3xc2!}, {1.Rd3? [2.e4#] Rg3xd3+!}, {1.Rxg6? [2.Rd6#] Bh3-e6!}, {1.Kxb3? [2.Qc4#] a1=S+!}, {1.Ref3? [2.e4# / Se3#] Rxf3+!}, {1.Rxg3? [2.e4# / Se3#] Rxg3+!}, {1.Sd3? [2.Sb4# / Sf4# / Re5#] Rxe3!}, {1.Qd1? [2.Qxb3#] a1=S!}

Key : 1.Kd3! [2.Qc4#]
1...Rxe3+ 2.Sxe3# 
1...Bf5+ 2. Rxf5#.

Theme Elmgren.  




Update on 11-04-2016

The composer Alberto Armeni has created a tak for theme Elmgren, with 11 black pieces!

Task with 11 black pieces


Problem-814
Armeni Alberto
“Problemas”, April 2016, problem n. 174, page 350
Source: https://drive.google.com/file/d/0B5lHTACLJK1fZnZjUjZzWjZ1RUk/view

2b5/p2p3R/1p1Qp3/5p2/5Pp1/3p2Kp/r2S3R/b2S2kB (8 + 12)
#2


Tries: {1.Bb7? / Ba8? Bc8(x)b7!}, {1.Qxb6+? a7xb6!}, {1.Bc6? d7xc6!}, {1.Qc5+? b6xc5!}, {1.Bd5? e6xd5!}, {1.Be4? f5xe4!}, {1.Sf3+? / Bf3? g4xf3!}, {1.Re2? d3xe2!}, {1.Rg2+? h3xg2!}, {1.Rf2? Ra2xd2!}, {1.Qd4+? / Qe5? Ba1xd4! / Ba1xe5!}.

Key: 1.Bg2! [2.Rh1#] hxg2 2.Rxg2#

Theme Elmgren. Task with 11 black pieces defending tries. 

Wednesday, January 07, 2015

A gift for a nameday

Today in Greece is celebrated the nameday of John (=Ioannis, Gianni, Johannes). I will dedicate today's post to my good friend and excellent chess composer, Ioannis Kalkavouras.

Since he likes logical compositions, I created a small one, it is only threemover, not a multimover as they are the ones he usually composes.

Happy nameday, John!


Problem-794 (original)
Emmanuel Manolas, GR
dedicated to Ioannis Kalkavouras

2s1SBB1/p2pr3/1p3p2/8/2PkSP2/2pPp3/4K3/8 (8 + 9)
#3

Tries: {1.Bxe7? [2.Bxf6#] Sxe7!}, {1.Sc7? [2.Sb5#] a6!}

Key: 1.Sg7! [2.Sf5#]
1…Sd6 2.Bxe7 [3.Bxf6#] Sxc4 / Sxe4 / Sf7 / Se8 3.Sf5#
1…Re5 2.Bb4 [3.Bxc3#] Rxe4 3.Sf5#
1…Rxg7 2.Bxg7 [3.Bxf6#]

The try 1.Bxe7? with threat [2.Bxf6#] (this is the Main Plan) is answered with 1...Sxe7!
After the key 1.Sg7! with a different threat [2.Sf5#] (this is the Pre-Plan), Black tries to resist with 1...Sd6 and then reappears the try-move Bxe7 with the initial threat [Bxf6#] (that is the Main Plan).

Saturday, December 27, 2014

Farewell to 2014

The year 2014 is almost over and we all postpone our hopes to 2015 for all the things we have dreamed and never achieved or never happened.
With wishes for making our lives better in any possible aspect, I give you two problems to solve.

Probblem-792 (original)
Manolas Emmanuel (GRE)


5S2/8/1q6/5kP1/4rP2/2s1QK2/2S5/1B6 (6 + 10)
#2, Two-mover

Select between the brackets to see the solution :
[Tries : {1.Sd4+? Qxd4!}, {1.Qc5+? Qxc5!}, {1.Qxb6? Rxf4+!}, {1.Qxe4+? Sxe4!}.

Key : 1.Qd4! [2.Se3#]
1...Sxb1 / Sd1 / Sd5 2.Qxe4#, 1...Rxf4+ 2.Qxf4#, 1...Qxb1 2.Qf6#, 1...Qxd4 2.Sxd4#]

The same piece makes two tries and the key (theme Option).
Black's answer 1...Rf4+ opens road for the piece that gives mate (theme bicolour Bristol). Black corrects the move 1...Qxb1 with a better 1...Qxd4, without success. All the black pieces are used to defend the various tries (theme Elmgren).
The threat 2.Se3# and the mating move 2.Sxd4# exploit the pinning of bRe4 which is done from another piece (the wBb1), (theme Boros).

Problem-793 (original)
Manolas Emmanuel (GRE)


s2k2s1/S5S1/3K4/p1ppp1p1/3Q4/2rPr3/3B4/3q4 (6 + 11)
#3, Three-mover

Select between the brackets to see the solution :
[Tries : {1.Sc6+? Kc8!}, {1.Se6+? Ke8!}, {1.Qg4? Qxg4!}, {1.Qa4? Qxa4!}.

Key : 1.Qxd5! [2.Qxa8# / Qxg8#]
1...Sc7 2.Qxg8+ Se8+ 3.Qxe8#, 
1...Se7 2.Qxa8+ Sc8+ 3.Qxc8#, 
1...Rcxd3 2.Bxa5+ Sb6 / Sc7 3.Bxb6# / Bxc7#, 
1...Rexd3 2.Bxg5+ Sf6 / Se7 3.Bxf6# / Bxe7#,
1...Qb3 2.Qxa8+ Qb8+ 3.Qxb8#, 
1...Qf3 2.Qxg8+ Qf8+ 3.Qxf8# ]

Symmetrical position with three pairs of symmeric variations in the solution. This is called Vertical Mirror Echo. The same piece makes two tries and the key (theme Option). There are crossed checks and grabbing of the black pieces. The bK is mated from six squares of his row and four squares of his diagonals.

Thursday, December 25, 2014

Award for 2nd TT Kobulchess Christmas 2014

(25.12.2014) Here is the Award of the 2nd KoBulChess TT - Cristmas Tourney 2014! Many thanks to all participants and to the judge IM Krassimir Gandev for his quick work. The award remains open for 1 month period.
2nd KoBulChess TT – Christmas Tourney 2014
Theme: All type problems (#/=, H#/H=, S#/S=, HS#/HS= etc.) in 2-4 moves (up to 8 moves for Series and P-Series problems) with the fairy condition Circle SneK. Other fairy pieces and conditions are not allowed. Royal pieces can be used of course.
Circle SneK:
When a Queen is captured - a Rook (or Royal Rook) of the same color (if exists on the board) becoming Queen;
When a Rook is captured – a Bishop (or Royal Bishop) of the same color (if exists on the board) becoming Rook;
When a Bishop is captured - a Knight (or Royal Knight) of the same color (if exists on the board) becoming Bishop;
When a Knight is captured – a Queen (or Royal Queen) of the same color (if exist on the board) becoming Knight.
Only one piece may change its type after a capture. In case of option – the capturing side choose which piece will be transformed.
The capture and the change of type is a single move. If this full move result a selfcheck - the capture is forbidden. 
The capture of a pawn is normal. The capture is normal also in the case when there is no piece on the board which should be transformed. Castling with Royal piece is not allowed.
Entries: 22 
Participants: Pierre Tritten, Manfred Rittirsch, Mario Parrinello, Kostas Prentos, Emmanuel Manolas, Rainer Kuhn, Themis Argirakopoulos, Sebastien Luce, Ralf Kraetschmer, Alain Bienabe
Countries: Greece, Italy, Germany, France
AWARD
It was pleasure for me to be a judge of this interesting tourney. I received from the director Diyan Kostadinov 22 entries (including 2 versions) in anonymous form.
I propose the following ranking:
ct1
1st Prize – Manfred Rittirsch
   a) 1....Rd2? ... 3. ... Qxg3(wRh8)+ 4.hxg3(bQh5)!
1...Sf2 [~? ... 4.Sxc3(bBh3)!] 2.Rf5+ [~? ... 3.h8Q+ Rd,Rhxh8(wQf7)!] gxf5
3.h8Q+ Bxc3(wSh8)# [4.Sxc3(bBf2)??, 4.Kxf2(bSg4)??]
   b) 1...Sf2? ... 3. ... Bxc3(wSh8)+ 4.Kxf2(bSh5)!
1....Rd2 [~? ... 4.hxg3(bQd8)!] 2.Sd6 [~? ... 3.h8B+ Qxh8(wBb5)!] cxd6
3.h8B+ Qxg3(wRh8)# [4.hxg3(bQd2)??, 4.Kxd2(bRb2)??]
This is my favourite. Very rich Circle SneK specific logical maneuvers with reciprocal correspondence of pieces, change of promotions, cross checks and Circle SneK mates.
2nd Prize – Mario Parrinello
a) 1…rQh8 2.Sa6 Sf6 3.rQa1 Sxg8(rSa1)+ 4.hxg8Q(rSh8)+ Qxa6(wSg8)#
b) 1...rQc8 2.Sh6 Sc6 3.rQc1 Sxb8(rSc1)+ 4.axb8Q(rSc8)+ Qxh6(wSb8)#
Wonderful Echo mates, creation of black batteries with ODT, change of functions between wSs and nice fairy play!
ct2
3rd Prize – Emmanuel Manolas
1.Bg7 fxe8Q(bQh7) 2.Bxc3(wBg1) Qxe2(bSh7)#
1.Sxc3(wBg1) fxe8S(bQh7) 2.Qd3 Sxd6(bRf8)#
Model mates, selfblocks, promotions, all types of SneK conversions and SneK mates.
4th Prize – Pierre Tritten
1.Be4 Bxb3(bSf4) 2.Se2 Rxd1(bRc3)#
1.Sd2 Rxf4(bQd1) 2.Qe2 Bxg6(bBd2)#
Same motivation for white captures: first one allows black transformed piece to block on e2, second one avoids black defense, change of functions, all types Circle SneK transformations.
ct3
5th Prize – Themis Argirakopoulos
1.d1B 2.b1R 3.Rb2 4.Rg2 5.Bf3 6.Bc6 Kxg2(Rc6)=
[7.Rxb6(Rd6)? 7.Rxc7(Se6)? 7.Rxd6(Bc7)?]
1.d1S 2.b1Q 3.Qa2 4.Se3 5.Sg2 6.Qa8 Kxg2(Sa8)=
[7.Sxb6(Rd6)?  7.Sxc7(Se6)?]
A wonderful problem with AUW where the stalemate positions are possible because of SneK protections.  
6th Prize – Argirakopoulos, Luce, Tritten
a) 1.c2 2.c1B 3.Bf4 4.Bh2 5.g1R+ Sxg1(bRh2)#
b) 1.b1S 2.Sd2 3.Sf1 4.g1Q 5.Qg4 Bxf1(bSg4)#
Interchange of function between the white pieces, AUW.
ct4
Special Prize – Pierre Tritten
1.Bf4+ Kxf4(bBh3) 2.Rf3+ Kxf3(bRh3) 3.Qe3+ Kxe3(bQh3)
4.Se2+ Kxe2(bSh3) 5.Sf2 Kxf2=
Funny idea – the black Knight h3 plays like a Knight again after a full Circle SneK cycle of transformations
1st Honorable mention – Argirakopoulos, Tritten
a) 1.Kd5 2.Kxe4(wRf8) 3.Kd5 4.Kd6 Rd8#
b) 1.Sd7 2.Sxf8(wBh3) 3.Sd7 4.Sc5 Rd4#
c) 1.Rc3 2.Rxh3(wRf8) 3.Rc3 4.Rc5 Rd8#
Double switchbacks by three black pieces (King, Knight, Rook), Zilahi and nice white/back Forsberg suit twins.
ct5  
2nd Honorable mention – Kostas Prentos
1.Qe3 Sg6 2.Bd4 Bd3#
1.Qxe5 Bc4 2.Be3 Rf4#
Two Circle SneK specific mates.
3rd Honorable mention – Kostas Prentos
1.Bb1 Bg7 2.Se4 Bxe5(wBe4) 3.Bec2 Kxf5(wRc2) 4.Rf2+ Sxf2(wRb1)#
1.Rf2+ Kf7 2.Sh7+ Ke8 3.Sg5 Bxe5(wBg5) 4.Bc6+ Sxf2(wRc6)#
Problem type ANI: in the 1st solution is presented a hybrid of Bristol and Indian - the first white Bishop opens the line for the second white Bishop, which on the next move will transform into Rook, creating a battery. 2nd solution reach the same mate after different active play of the white pieces.
Commendations (equal rank):
ct6
Com – Themis Argirakopoulos
a) 1…g8R 2.e1S Rg2 3.Sc2 Rxc2(bSd3)#
b) 1…h8Q 2.h1B Qh6 3.Bc6 Qxc6(bBb3)#
Com – Alain Bienabe
1.Kxd5(wRe7) Ra7 2.Kc5 Ra5#
1.Kxe7(wBc4) Sc6+ 2.Ke8 Rd8#
ct7
Com – Rainer Kuhn
1.Sxa1(bRd1)! Rxa1 2.a8Q+ Qxa8(wQe1)#
1.rBa8! Qa4 2.Re8+ Qxe8(rRa8)#
1.rBb7! Bxc2 2.a8Q+ Qxa8(wQe1)#
Com – Sebastien Luce
1…Ba7 2.Sxa7(wBe4)+ Bxg2(bBa7) 3.Bb8 Kb6#
1…Bb6 2.Sxb6(wBe4) Bxg2(bBb6) 3.Ba7 Kc7#
ct8
Com – Emmanuel Manolas
1.Qxd5(bBc3)+! (bBe6?) Kxd5(wQh5)
2.Qxe6(bSh2)+ Kxe6 3.Qxf7(bRc3)+ Kxf7 4.g8Q#
Com – Rainer Kuhn
1.rSc3 Kg4 2.Bxf5+ Kxf5(rBc3) 3.rBa1 Be5#
1.rSb4 Kh3 2.rSc6 Be5 3.rSxe5(wBe8) d4#
I wish to all participants and the tourney director – Merry Christmas and Happy New Year 2015!
gandev
Sofia 24.12.2014        Judge: IM Krassimir Gandev

Thursday, November 13, 2014

Two miniatures by two friends

A problem with a total of up to 7 pieces is a Miniature.

In today's post we will see a direct two-mover by Nikos Pergialis and a helpmate five-mover by Emmanuel Manolas.

Problem-773
Nikos Pergialis, GR
original

8/8/8/8/3K4/p3S3/s2kp3/Q7 (3 + 4)
#2

Tries : {1.Qe1+? / Qxa2+? K(x)e1!}, {1.Qc3+? Sxc3!}, {1.Sc4+? Kc2!}

Key : 1.Qb1! [2.Sc4#]
1...Sc1 2.Qb4#
1...e1=Q / e1=R 2.Qc2#
1...e1=S 2.Qd1#
1...e1=B 2.Qd1# / Qc2#

In this miniature we see Dual Avoidance in the black answers 1...e1=Q / T and 1...e1=S where, while White can play 2.Qc2 or 2.Qd1 to mate, the black promoted piece inhibits the one of the two white moves. The promotion to black Bishop is not a good black answer.
Also, we see Anti-reversal-Menace. The move 1.Qb1 threatens 2.Sc4#, but the move 1.Sc4 is not threating 2.Qb1#.
The Theme Ropke is present : Two black defences from promotion of a specific pawn to same square are followed by two different white moves.
The Theme Option is present : The key, and at least two tries with different defences, are played with the same piece.


Problem-774
Emmanuel Manolas, GR
original

3b4/K7/3k1r2/4s3/4b3/8/4P3/8 (2 + 5)
h#5
a) Diagram, b) wKa7 to g7

a) Diagram
1.Bb7 e4 2.Sd7 e5+ 3.Kc7 e6 4.Bc8 e7 5.Rc6 e8=S#

b) wKa7 to g7
1.Bc6 e4 2.Sf7 e5+ 3.Ke7 e6 4.Bd7 exf7 5.Re6 f8=Q#

In both solutions the wPe2 starts from its initial position and in the fifth move it gets promoted (to a different piece in each solution) and delivers mate. The course of the pawn is the Theme Excelsior.
The mate is done with self-block (even with sacrifice) of black pieces.
White moves only his pawn. The kind of piece that Black moves is the same in the corresponding moves of the two solutions. Black moves white-squared Bishop, Knight, King, white-squared Bishop, Rook.



Monday, June 23, 2014

13th Greek Championship in Solving, 2014

The 13th Greek Championship in Solving Chess Problems this year went to Patras, Greece, first time away from Athens.
It was organized by The Patras Chess Group (SOP) and was hosted by the Chamber of Achaia in a very nice conference room, and there were 24 participants. Available time for solving : 3 hours.

Surname Name nr.
1
nr.
2
nr.
3
 nr.
4
nr.
 5
nr.
6
nr.
7
nr.
8
nr.
9
nr.
 10
nr.
 11
nr.
12
total mins rank up to
18
w
Mendrinos Nikos 5 5 5 5 4 5 5 1 0 35 180 1
Papastavropoulos Andreas 5 5 5 5 4 5 0 29 180 2
Konidaris Panagiotis 5 5 0 3 5 0 4 3 25 180 3
Spyropoulos Giorgos 5 5 5 0 0 5 0 0 20 180 4
Spiliadis Athanasios 5 5 4 1 2 0 17 180 5
Fougiaxis Harry 5 5 5 1 16 180 6
Triantos Konstantinos 5 5 5 0 0 0 15 167 7 v
Betsos Titos 5 5 5 15 180 8, 9
Pountzas Chrysanthos 5 5 0 5 0 15 180 8, 9
Alexandrou Anastasios 5 5 4 0 14 180 10
Masouros Panagiotis 5 0 5 0 0 4 14 180 11
Malataras Gerasimos 5 5 3 0 0 13 180 12 v
Athanasopoulos Kyriakos 5 5 0 10 170 13 v
Vaggopoulos Anastasios 5 0 3 0 0 0 8 180 14
Stamatopoulos Apostolos 5 0 0 0 2 7 161 15 v
Zaronikas Dimitris 5 0 0 2 0 7 168 16 v
Manolas Emmanuel 0 0 4 0 0 3 7 180 17
Kalyva Kyriaki 5 0 0 0 0 0 0 5 171 18, 20 v v
Mavromati Aggeliki 5 0 0 5 171 18, 20 v
Kakoulidis Vasilis 5 5 171 18, 20 v
Betsos Nicolas-Evaggelos 5 0 0 0 0 5 173 21 v
Stefanatos Gerasimos 5 0 0 0 0 0 0 5 180 22 v
Stamatopoulos Giorgos 0 0 0 180 23 v


Here you may see the problems, selected by the judge Ioannis Garoufalidis, who said the problems were easy because he decided to lower the level a bit so that more solvers can solve them, and their solutions.

With 5 points per problem, solving 12 problems you get 60 points maximum.

The problems ...

... and their solutions.