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MatPlus.Net Forum Competitions Murfatlar Tourney for Proof Games – 3rd edition
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(1) Posted by Vlaicu Crisan [Saturday, Sep 12, 2020 17:39]

Murfatlar Tourney for Proof Games – 3rd edition

This year, the World Congress of Chess Composers was canceled. But our tourney must go on!

Theme: Proof Games in which Point Reflection condition must be presented. The authors could add another fairy condition, but not fairy pieces. This condition was introduced first time at Sake Tourney, Vilnius 2019, by the Japan delegates.

Definition: When two pieces of any colour stand on the squares which are symmetric to the central point of the chessboard (e.g. a1-h8, g3-b6), they exchange their role (i.e. power of movement). A Pawn on the first rank and its corresponding unit on the 8th rank cannot move by themselves. Only non-reflected K and R can castle, and only non reflected Ps can make en passant captures.

1. Anna O'Donovan
The Problemist, March 2020
(= 16+16 )

Point Reflection SPG 8.5

1.b3 h6 2.Ba3 he3 3.Bd6 e3-c5 4.Bg3 d6 5.f3 Sd7 6.e2-d4 b6 7.Be2 ba5 8.Be2-c1 Sb6 9.Bg3-f1

Here, this condition is skillfully used to show Bishop Platzwechsel.

2. P. Răican
StrateGems 89/2020
(= 13+15 )

Point Reflection SPG 22.0

1.e4 Sh6 2.Bb5 Sf5 3.Bc6 bxc6 4.c4 Ba6 5.cd6 Bc4 6.dxe7 Bxe7 7.dh6 Bh4 8.Bg5 Ke5 9.Qd4+ Kb5 10.Sd2 Bc4-e5 11.Rd1 Be8 12.Rh5 Bxf2+ 13.Ka1 cg3 14.h4 Qa5 15.hf4 Qa3 16.R5h2 a4 17.h3 Ra5 18.Bh4 g5 19.Qg7+ Rb4 20.bf6 Rg8 21.Qh8 Rg6 22.Ke5 Sd4#

Triple Bristol on file a (QPR), triple Bristol on diagonal a1-h8 (QPK), Bristol on file h (RP), all with an exotic condition. The theme required at WCCC Vilnius, Champagne 2019.

Deadline: November 15, 2020.
Judge: P. Răican,
Prize: Bottles of Murfatlar (delivered at the next WCCC)
(Read Only)pid=19643
(2) Posted by Paul Raican [Sunday, Sep 13, 2020 08:14]

The first example (O'Donovan) is Jacobi+, in about 34 hours on my laptop.
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MatPlus.Net Forum Competitions Murfatlar Tourney for Proof Games – 3rd edition