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  2. Babson task - Wikipedia

    en.wikipedia.org/wiki/Babson_task

    Also, when first presented, the black piece at h4 was a pawn, but a computer discovered an additional solution by 1.axb8=N hxg3+ 2.Kh3 Bxb8 3.Qxc2 and mate next move. Yarosh then substituted a knight on that square; now 1.axb8=N fails to 1...Nf3+ 2.Bxf3 Bxb8 3.Qxc2 Bxg3+ and White is too late.

  3. Plaskett's Puzzle - Wikipedia

    en.wikipedia.org/wiki/Plaskett's_Puzzle

    Plaskett's Puzzle is a chess endgame study created by the Dutch endgame composer Gijs van Breukelen (February 27, 1946 – December 21, 2022) around 1970, although not published at the time. Van Breukelen published the puzzle in 1990 in the Netherlands chess magazine Schakend Nederland .

  4. Helpmate - Wikipedia

    en.wikipedia.org/wiki/Helpmate

    The problem had White to move and White could play in a number of different ways to achieve the same mate (duals), considered a serious flaw today. In The Chess Monthly , November 1860, American puzzle inventor Sam Loyd published the first helpmate with Black to move as is now standard, one intended main line, and an attractive but false ...

  5. 10 Hard Math Problems That Even the Smartest People in the ...

    www.aol.com/10-hard-math-problems-even-150000090...

    For example, if s=2, then 𝜁(s) is the well-known series 1 + 1/4 + 1/9 + 1/16 + …, which strangely adds up to exactly 𝜋²/6. When s is a complex number—one that looks like a+b𝑖, using ...

  6. Endgame study - Wikipedia

    en.wikipedia.org/wiki/Endgame_study

    In the game of chess, an endgame study, or just study, is a composed position—that is, one that has been made up rather than played in an actual game—presented as a sort of puzzle, in which the aim of the solver is to find the essentially unique way for one side (usually White) to win or draw, as stipulated, against any moves the other side plays.

  7. Excelsior (chess problem) - Wikipedia

    en.wikipedia.org/wiki/Excelsior_(chess_problem)

    Loyd had a friend who was willing to wager that he could always find the piece which delivered the principal mate of a chess problem. Loyd composed this problem as a joke and bet his friend dinner that he could not pick a piece that didn't give mate in the main line (his friend immediately identified the pawn on b2 as being the least likely to deliver mate), and when the problem was published ...

  8. 4 Pics 1 Word Cheats- Answering Difficult Puzzles - AOL

    www.aol.com/news/2013-02-20-4-pics-1-word-cheats...

    Occasionally, we'll rattle off four to five puzzles with little effort before getting stuck for upwards of an hour, whereupon which we eventually 4 Pics 1 Word continues to delight and frustrate us.

  9. Talk:The Hardest Logic Puzzle Ever - Wikipedia

    en.wikipedia.org/wiki/Talk:The_Hardest_Logic...

    (1) The article concerns 'The Hardest Logic Puzzle Ever' which is the name Boolos' gave to a puzzle that he published a solution for (the puzzle containing his clarifications). The article is about *that* puzzle. (2) Modified Random fits in with the article since Boolos' solution applies to that no-information-giving Random as well.