Originals 13-261118

 


Original Problems

 

13-26th of November, 2018

  • (26.11) No.1348 – Ivan Skoba (ser-#6/ser-=6 ; Neutral piece, Royal Rose-Lion ; Madrasi). Time waiting with neutral Pawns and Madrasi condition… (Author)
  • (23.11) No.1347 – Vitaly Medintsev (hs#8). Two critical maneuvers over the same square d5 with anti-Bristol and Bristol effects (only last 7 moves tested).
  • (22.11) No.1346 – Hubert Gockel (h#2, SuperGuards, Neutral pieces). “The curiosity is that only neutral Pawns (in contrast to S,B,R,Q) can capture and check in Superguards.” (Author)
  • (20.11) No.1345 – Paul Rãican (PG 9 #Color, Einstein). “#Color Chess was first time described by Andrey Frolkin in feenschach 212/2015. The genre was implemented by Francois Labelle in Jacobi.” (Author)
  • (15.11) No.1344 – Vladislav Nefyodov (h#3 ; NAO, Rook-Lion). “An idea of exchange of places with antidual tries” (Author)
  • (13.11) No.1343 – Julia Vysotska (hs#3.5 ; Half-neutral pieces). In 2 phases: the same half-neutral piece makes 4 moves on its orthogonal/diagonal; gives check + switchback mate.

Animated diagrams use Py2Web by Dmitri Turevski and WinChloe’s graphics.


All previously published problems you can find in the subsections of Original Problems menu on the top.
The  judge of JF-2018/II: Kjell Widlert. The judge of Retro & PG problems 2017-2018: Dirk Borst.


Jacobi equipped with constraints… (Michel Caillaud, Nicolas Dupont, François Labelle)

Jacobi: constraints

An article by Michel Caillaud, Nicolas Dupont, François Labelle explains and illustrates a new tool to solve some complicated fairy PGs offered by the solving program Jacobi – the possibility to add some constraints in the input.
(with gratitude to the authors for offering this article to JF)

…Jacobi constraints let the user specify some or all of a piece’s moves. One design goal was to be able to represent the “strategy” notation displayed by Natch and Euclide when solving a proof game, so the notation is somewhat similar. This common notation includes the “-” and “x” symbols, and a minimum number n of moves played by a piece is marked “(n)”…


Originals 04-061118

 


Original Problems

 

4-6th of November, 2018

  • (06.11) No.1342 – Igor Kochulov (h#2* ; Neutral Triton ; Circe, AntiCirce).
  • (04.11) No.1341 – K. Seetharaman & S. K. Balasubramanian (h#2 ; Neutral Locust).
  • (04.11) No.1337.2 – Anatoly Stepochkin & René J. Millour (#7 ; Maximummer). Another version to No.1337.
  • (04.11) No.1334.2 – Pierre Tritten & Jacques Rotenberg (h#2 ; Breton adverse). One more improvement to No.1334 in reply to the comment by Aleksandr Bulavka.

Animated diagrams use Py2Web by Dmitri Turevski and WinChloe’s graphics.


All previously published problems you can find in the subsections of Original Problems menu on the top.
The  judge of JF-2018/II: Kjell Widlert. The judge of Retro & PG problems 2017-2018: Dirk Borst.