[Retros] Solidarity chess (=SC)

Noam Elkies elkies at math.harvard.edu
Wed Dec 19 12:34:11 EST 2012

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?


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