Belgrade Internet Tourney 2019


Group C – fairy hs#3, Protean chess


Petko Petkov





Judge: Petko Petkov, International Judge

Published 25. May (Open to claims until 25th June)




Marko Ložajić Director:
Marko Ložajić


PDF version
This year's BIT tournament (section C) is dedicated to the 30th anniversary of the death of legendary grandmaster Nenad Petrović. I am very pleased to note that the level of the tournament is high; a number of very interesting problems have been presented, which will certainly stimulate future work on this theme!

Nenad Petrović
Nenad Petrović
(7th-Sep-1907 – 9th-Nov-1989)

Thanks to all the participants, and congratulations to the winners!
The theme of this tournament was: The fairy conditions Protean Chess or Frankfurt Chess, presented in HS#3 with exactly 2 solutions.
Above all, I must point out that these two conditions are almost identical, and the general requirement for them is: "When a piece captures (King included), it takes the nature of the captured unit (without changing colour). A King capturing becomes a royal unit". (Nowadays this definition exists in WinChloe and the condition is denoted by the French name Francfort).
In fact, this is the exact definition of Frankfurter Chess, first introduced by the inventors Albert Heinrich Kniest & John Niemann in The Fairy Chess Review, Vol. 7, Nr. 1, VIII / 1948. The name of the condition, however, was coined by Paul Schlensker.
The predecessor of Protean Chess is the Protean piece, also defined by A. H. Kniest around 1940 in Unsere Schachwelt, but historically it is not known when exactly the Protean Chess condition was established.
The difference between Frankfurter Chess and Protean Chess is the following: If an enemy pawn is captured in Protean Chess the new pawn on the same square (with a changed color) moves in the direction of the captured pawn. In Frankfurter Chess, of course, this strange rule is missing (nowadays Protean Chess exists in Popeye). When there are no pawn captures or these captures have no thematic effect and do not affect the correctness of the problem, we can assume that the two conditions are the same. In this case, the author may indicate below the diagram what condition he wishes.
For the sake of clarity, I decided to place the following additional symbols after the solutions of the problems, using the first letters of the program names Popeye (P) and WinChloe (W): (P + W) means that it is possible to use either of the two conditions; (P) means that only Protean Chess is used; (W) means that only Frankfurter Chess is used.

From the tournament director I received 24 originals by 18 authors from 11 countries. I eliminated from the tournament on various grounds the following problems: No: 17, 21, 24 these problems do not meet the regulation as they have twins or set-play. No 4 - Not optimal construction. It is easily possible to get a position with 2 pieces less if you move the starting position with one vertical to the right. No 11 - The wBc1 is superfluous in the solution after 1.g8 = Q.
I suggest the following ranking
1st Prize, Ofer COMAY
white Pb4d2f2g2 Se8 Bb3 Kc1 Re2 black Bc5 Kf8 Qd4 Pb6g3g5 Sc2d1 Rf4

hs#3    2 solutions     (8+9)

   Protean Chess   

Solution   (click to show/hide)

FEN: 4Nk2/8/1p6/2b3p1/1P1q1r2/1B4p1/2nPRPP1/2Kn4
(C+ by Popeye + WinChloe)

2nd Prize, Ivo TOMINIĆ
white Rf7 Sf8 Bb8d5 Kg3 Ph6 black Rh2 Kf5 Bf6f3

hs#3    2 solutions     (6+4)

   Protean Chess   

Solution   (click to show/hide)

FEN: 1B3N2/5R2/5b1P/3B1k2/8/5bK1/7r/8
(C+ by Popeye + WinChloe)

3rd Prize, Kostas PRENTOS
white Qa5 Pa7 Ka6 Rd6 Bc4 black Ka8 Bb1 Sf4

hs#3    2 solutions     (5+3)

   Protean Chess   

Solution   (click to show/hide)

FEN: k7/P7/K2R4/Q7/2B2n2/8/8/1b6
(C+ by Popeye + WinChloe)

Spec. Prize, Mario PARRINELLO
white Pe6f6 Kc7 Sb5g3 black Pd6c6 Kd2 Bc3 Re2

hs#3    2 solutions     (5+5)

   Protean Chess   

Solution   (click to show/hide)

FEN: 8/2K5/2ppPP2/1N6/8/2b3N1/3kr3/8
(C+ by Popeye)

1st Hon. Mention, Borislav GADJANSKI
white Qg6 Pd7a6 Kg5 Rb7 Sd3 black Pd5 Kc6 Rd6 Sh4

hs#3    2 solutions     (6+4)

   Frankfurt Chess   

Solution   (click to show/hide)

FEN: 8/1R1P4/P1kr2Q1/3p2K1/7n/3N4/8/8
(C+ by WinChloe)

2nd Hon. Mention, Vlaicu CRISAN & S.K. BALASUBRAMANIAN
white Bg1 Re7 white Royal Sd4 black Qh5 Rf2 Ka3 Bd7

h#3    2 solutions     (3+4)

   Protean Chess   

   Royal Sd4   

Solution   (click to show/hide)

FEN: 8/3bR3/8/7q/3N4/k7/5r2/6B1
(C+ by Popeye + WinChloe)

3rd Hon. Mention, Luis Miguel MARTÍN
white Pb7h6 Rg6f4 Ba8c3 Kg5 black Re2h1 Ka7 Bd7b4 Sh5

hs#3    2 solutions     (7+6)

   Protean Chess   

Solution   (click to show/hide)

FEN: B7/kP1b4/6RP/6Kn/1b3R2/2B5/4r3/7r
(C+ by Popeye + WinChloe)

Commendation, Juraj LÖRINC
white Kb2 Rc8b8 black Pg6h6c4b4 Kh7 Ba2 Sc2

hs#3 (3+7)

   Frankfurt Chess   

Solution   (click to show/hide)

FEN: 1RR5/7k/6pp/8/1pp5/8/bKn5/8
(C+ by WinChloe)

Commendation, Karol MLYNKA
white Rg3 Bd1 white Royal Pg2 black Royal Ph2

hs#3    2 solutions     (3+1)

   Protean Chess   

   Royal Pg2, Ph2   

Solution   (click to show/hide)

FEN: 8/8/8/8/8/6R1/6Pp/3B4
(C+ by Popeye + WinChloe)


MP_icon

Thematic condition


HS#3, 2 solutions, Protean Chess.

No other fairy conditions or fairy pieces are allowed, except royal pieces (only one for each side!): Royal Queen (rQ), Royal Rook (rR), Royal Bishop (rB), Royal Knight (rS) and Royal Pawn (rP). These royal pieces may be present in the initial position (example 2) or may appear during the play. Royal Pawn promotions are allowed. "Supernumerary" pieces in initial position (e.g. 2 white Queens, 3 white Bishops, 3bR, 4 bS, etc...) are permitted if this form is thematically necessary for the problem.

Protean Chess: When a piece (King included) captures, it takes the nature of the captured unit (without changing color). A King capturing becomes a royal unit.

Royal Piece: Piece that executes a function of the King on the board: it becomes object of check and mate.


Example 1:
Petko PETKOV

Original

white Pe4f5 Kd8 Be8 Sg8 Rf1 black Pc6g4h4 Sd7a6 Bf8d5 Kg5 Rd2

hs#3 Protean chess

2 solutions

1.Rf1-c1 Sa6-c5 2.Rc1*c5=S Sd7-b6 {
} 3.Sc5-e6 + Bd5*e6=S # 1.f5-f6 Bf8-g7 2.f6*g7=B Bd5-e6 {
} 3.Bg7-f6 + Sd7*f6=B #

Thematic sacrifices of Sa6 & Bf8, reciprocal play of Sd7 & Bd5 exchanging their nature: B becomes S and S becomes B


Example 2:
Petko PETKOV

Original

white Kf2 Sc4 black Qa4 Sf3 black Royal Pf5

hs#3 Protean chess

Royal Pf5

2 solutions

1.Sc4-d2 Sf3-e1 2.Kf2*e1=rS Qa4-e4 + {
} 3.Sd2*e4=Q + rPf5*e4=rQ # 1.Sc4-e5 Sf3-g1 2.Kf2*g1=rS Qa4-g4 + {
} 3.Se5*g4=Q + rPf5*g4=rQ #

Multiple thematic sacrifices lead to surprising Ideal Echo-mates. Tanagra form.


Winners


Ofer Comay
Ofer Comay

Ivo Tominić
Ivo Tominić

Kostas Prentos
Kostas Prentos

Mario Parrinello
Mario Parrinello

Participants


Themis Argirakopoulos – GRE (22)
S.K. Balasubramanian – IND (2*,15)
Ofer Comay – ISR (1)
Vlaicu Crisan - ROU (2*)
Borislav Gadjanski – SRB (16)
Eric Huber – ROU (17,24)
Igor Kochulov – RUS (3,9)
Juraj Lörinc – SVK (4,10)
Manikumar S – IND (13,14)
Luis Miguel Martín – ESP (18)
Miodrag Mladenović – SRB (19)
Karol Mlynka – SVK (5,11)
Mario Parrinello – ITA (6)
Kostas Prentos – USA (7)
Sergej Smotrov– RUS (20)
Viktor Syzozenko – UKR (21)
Ivo Tominić – CRO (23)
Aleksandr Tyunin – RUS (8,12)

18 names
from 11 countries