# No.733 (PE&SD)

 No.733 Paz Einat (Israel) &Stephan Dietrich (Germany) Warm welcome to Paz in Original problems section of JF! Original Problems, Julia’s Fairies – 2015 (I): January – June    →Previous ; →Next ; →List 2015(I) Please send your original fairy problems to: julia@juliasfairies.com

No.733 by Paz Einat & Stephan Dietrich – Surprising AUW with Functionary Chess! (JV)

Definitions:

Functionary chess: A piece can move only if it is threatened.

 No.733 Paz Einat & Stephan DietrichIsrael / Germanyoriginal – 23.02.2015 Solutions: (click to show/hide) white Ke3 Qg8 Pb2c5d2e2f3 black Kd7 Qb1 Bc7 Pe7g7 h#5                Duplex               (7+5)Functionary chess 1.g7-g5 b2-b4 2.g5-g4 b4-b5 3.g4-g3 b5-b6 4.g3-g2 b6-b7 5.g2-g1=R b7-b8=S # 1.b2-b4 g7-g5 2.b4-b5 g5-g4 3.b5-b6 g4-g3 4.b6-b7 g3-g2 5.b7-b8=Q g2-g1=B # { (C+ by Popeye 4.69)} Allumwandlung. Mechanism: - first pawn activates forces of opposite pieces by observing - second pawn gives mat without observing defendig opposite pieces. (Authors)

### 6 Responses to No.733 (PE&SD)

1. Luce Sebastien says:

Interesting presentation in Duplex. Good idea !
SL

2. seetharaman says:

Since both BQb1 & WQg8 cannot move (as they are not threatened), can they threaten the opposing piece(s) ? 🙂

• Kjell Widlert says:

The term “observed” is actually better than “threatened”.

In Functionary Chess (Beamtenschach to the Germans), a piece that is not observed by a piece from the opposite side cannot move – but it can still observe!

• seetharaman says:

Thanks you! I think ‘observed’ is apt here.

3. Michael Grushko says:

W Kc5, Rg8, Pb2, Pc4 (4)
B Kd7, Rb1, Bc7, Pe6, Pe7, Pg7 (6)
h#5 Duplex (4+6)
Functionary chess
C+

4. Paz says:

This version doesn’t seem to work. In the W to play part there is always 6.Kb4 or Kb5 that cut off the observation of the rooks.