In both examples (P1091679, P1339295) the word "genau" could have been omitted, imho. It is clear that in both problems…
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PDB uses the word "genau" extensively. The search stip="genau" and k="unique proof game" returns 27 problems, including twins that differ…
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I don't understand the logic, if there is one at all. 11.5 is AS EXACT a number as it could…
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Good choice, Nicolas. Although there are exceptions to this rule, it is a well established convention that a PG is…
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Is is true that, in the modern approach, PG is often used to denote in fact SPG, and exact PG…
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Joost, the stipulation "Shortest Proof Game" does not need to specify the side to move, or the number of moves…
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That is the point Georgy. For threefold repetition of position to be claimed by players the side to move is…
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IMO, SPG 11.5 asks for the shortest proofgame with black to move, and since there's no proofgame in less moves…
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Thierry Le Gleuher told me that as the retros editor of Phénix he would consider a PG 11.5 cooked if…
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Although the main idea of this problem is to lose a tempo for a PG 11.5, any shorter solution, whether…
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