[Retros] Solidarity chess (=SC)

[Joost de Heer]

On 19-12-2012 18:34, Noam Elkies wrote:

> Eric Angelini <Eric.Angelini at kntv.be> writes:

>

>> a (new?) chess variant here [...]

>> When you play "Solidarity Chess", you have to keep all the squares

>> on which your pieces are "glued" together to form a single territory.

>> A square is glued to another one by a side or a vertices.

>> The other rules stay the same.

>

> How are check and mate treated?  For example, after 1 c3 d6 2 b4 c5,

> is 3 Qa4 check even though Qxe8 would sever White's "solidarity"?

> If instead 3 d4, is 3...b5 legal even though White could split

> Black's army with 4 dxc5?


- Qxe8 is illegal because it splits the white position
- I assume you mean cxd5. That move is illegal too since it splits 
white's position.

Eric writes on his page: "Blanc et Noir ont donc une manière 
supplémentaire de gagner la partie : couper les lignes ennemies !" which 
translates approximately to: "So white and black have an extra way of 
winning the game: cut enemy lines!" and gives the example 1. e4 Sf6 2. 
d4 e5 3. Bc4 Sc6 (exd4 illegal) and threat 4... Sxd4 splitting white's 
position.

Judging by 'supplémentaire', kings are still royal (but can't be 
captured if the capturing move is illegal).

Joost