MESON Chess Problem Database

Problem Display
PID: 206309 (2B5/8/5KNp/4Qnpk/5r1b/6p1/7R/8 w - - 0 1)

Mari, Alberto

L'Illustrazione Italiana, 1925

2B5/8/5KNp/4Qnpk/5r1b/6p1/7R/8

#2

5 + 7

23 Die Schwalbe 1928
6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Se3+
      • 2.Sxf4#
    • 1...Sd4+
      • 2.Sxf4#
    • 1...Sd6+
      • 2.Sxf4#
    • 1...Se7+
      • 2.Sxf4#
    • 1...Sg7+
      • 2.Sxf4#
    • 1...g4+
      • 2.Rxh4#
  • Keys
    • 1.Qe8!
      • threat
        • 2.Se5#
      • 1...Se3+
        • 2.Sxf4#
      • 1...Sd4+
        • 2.Sxf4#
      • 1...Sd6+
        • 2.Sxf4#
      • 1...Se7+
        • 2.Sxf4#
      • 1...Sg7+
        • 2.Sxf4#
      • 1...g4+
        • 2.Sxh4#
      • 1...Kg4
        • 2.Se5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(d);CHECK,P_SPINP(e)::S(D),XR(b)
    • P(e);CHECK,N_GUARD,P_SPINS(d),S_CUTR(b)::R1(A),XB(c)
  • Actual
    • Q(B);
    • Threat
      • QAB(B)+S(D)
    • Vars
      • S(d);CHECK::QAB(B)+S(D),DCHECK,XR(b)
      • P(e);CHECK,SBLOCK::QAB(B)+S(D),XB(c)
      • K(f);N_SPINB(c),P_SPINS(d),S_FLIGHT::S(D)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).