что значит метка ref

Julia Vysotska my chess composition

Julia on { Speaking about everyone involved - Ive got this book from Geoff Foster and Im allowed... }

seetharaman on { I presume that black king is in check in the diagram.59. The problem is very... }

S. K. Balasubramanian on { No.57 Dear Mr. Nikola Predrag, I have seen in earlier problems your detailed analysis. I... }

Nikola Predrag on { No. 57 Dear, Mr. Balasubramanian, my knowledge and experience are certainly not enough to give... }

Dmitri Turevski on { This is simply the best book about chess composition that i have ever read. Thank... }

seetharaman on { Thanks to Chris Feather for providing this free and to Juliasfairies for providing the link.... }

S. K. Balasubramanian on { Dear Mr. Nikola Predrag, Thanks for your encouraging reply and comments. I understand from your... }

Nikola Predrag on { Oh, I forgot to mention that the moves of brS to 4 different squares add... }

Nikola Predrag on { No.57 Dear Misters, its incredible how such a small detail could change things. Now the... }

source