Valentín's website update thread - comments and appreciation

[pier4r]

Thank you for the overview!

(04-22-2023 03:36 PM)Valentin Albillo Wrote:  Unsolved positions

91.- "Mate the Royal Couple" - Proposed by V. Albillo, White to play and mate in 12

I thought (but couldn't prove) it was a mate in 12 but as you'll see in the Addendum 2020, chess fan Vincent Lejeune used ChessMaster 9000 in 2003 to try and solve this position and found that e4 is a mate in 11 !

92.- "Surrounded" - Proposed by V. Albillo, White to play and mate in 12 (?)


Still unsolved, AFAIK.

Neat problems there!