Hnefatafl - tactics and strategy

guillotine 5 -

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At this stage black might be tempted to just capture the executioner by moving j2 - j1 x. Wouldn't that remove the annoying piece, whilst still blocking the king? Well, yes it would, but the king can then move forward to j2. He would then be on an open second rank, and would be sure of reaching either a2 or k2 on the next move, and winning. So black cannot allow the king to move forward to j2, and therefore black cannot capture the executioner piece on i1.

This looks very bad...