Black is tied down to defence, but how can White, to play, make progress? RB We've been looking at zugzwang over the last few weeks so here I'm going to imagine it's Black to move. 1...Kg8 obviously leads to disaster after 2 Re8+ Rxe8 3 Qxe8+ Kh7 4 Qd7. 1...Bh8 would allow 2 Qh3, threatening Qd7, and is also catastrophic. Nor can the queen move: after 1...Qc8, for example, 2 c7 would lead to wholesale exchanges on e8 followed by promotion of the c-pawn. That leaves the rook. Is 1...Ra8 a viable waiting move? White is clearly better but I can't see how to continue and Black's position doesn't fall apart the way it should in a zugzwang ...

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