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Bn Em wrote on Tue, May 14 01:52 PM UTC in reply to Вадря Покштя from 06:10 AM:

Here is a link to Grolman Chess on Wikipedia (in Russian)

My Russian is alas extremely limited (i.e. isolated words), but it does look like about as much detail as in Problemist, i.e. extremely sketchy.

Regarding castling. It is not prohibited, but simply impossible. During the game there cannot be a situation where there are no pieces for castling between the king and the rook. The chess pieces are in a constant state of movement. Either the king or the rook will definitely make a move by the time the opportunity for castling arises.

Depends on whether you count moves made only automatically as K/R moves. Otherwise the following sequence of White moves, f.ex., would position the white K and K‐side R appropriately:

  1. e4(Ne2,Rg1)
  2. Ng3(Be2,Rf1)
  3. Bh4(Ne2,g3)
  4. Bg6
  5. g4(Ng3,Qe2,Kd1,Re1)
  6. Nh1
  7. Ng3(Rh1,Ke1,Qd1), ending in this position

Hardly a good sequence of moves, even if Black allows it, but neither K nor R have made any voluntary moves and the space between them is empty. A matter of opinion perhaps whether this kind of edge case is worth catering for.

Of course, there are various extended forms of castling in use (general two‐space K move, or Fischer Castling) which might be considered appropriate for a game even though it's not conventional in the Problem world, but it makes sense that at least the canonical version would forgo this.

The game is absolutely playable and is not chaotic at all

Pushing pieces around trying to contrive the above sequence leads me tentatively to agree, though of course nothing would substitute for actual play

I don’t know whether it’s worth including Grolman chess problems in the description of the rules

It'd be perfect for the Notes section, though ;‌) And whilst it's less common nowadays, there are plenty of pages here with illustrative problems or example games; I believe that kind of thing is still considered a positive


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