MESON Chess Problem Database

Problem Display
PID: 241441 (8/4PB2/2N5/4R2Q/P2Pp1N1/p1pk4/2n1p3/2K1n2b w - - 0 1)

Hjelle, David

Il Due Mosse, 1952

8/4PB2/2N5/4R2Q/P2Pp1N1/p1pk4/2n1p3/2K1n2b

#2

9 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.Sf2#
    • 1...Sxd4
      • 2.Sb4#
  • Tries
    • 1.Rxe4?
      • threat
        • 2.Sf2#
      • 1...Bxe4
        • 2.Qb5#
      • 1...Kxe4!
    • 1.Ra5?
      • threat
        • 2.Qb5#
      • 1...Sxd4
        • 2.Sb4#
        • 2.Sce5#
      • 1...Se3
        • 2.Sf2#
        • 2.Sge5#
      • 1...e3!
    • 1.Rc5?
      • threat
        • 2.Bc4#
      • 1...Se3
        • 2.Sf2#
        • 2.Sge5#
      • 1...e3!
  • Keys
    • 1.Re6!
      • threat
        • 2.Qb5#
      • 1...Kc4
        • 2.Qb5#
      • 1...Sxd4
        • 2.Sce5#
      • 1...Se3
        • 2.Sge5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(c);SBLOCK::S(D)
    • S(c);N_GUARD,SBLOCK,XP(C)::S(G)
  • Tries
    • Try
      • R(E);XP(h)
      • Threat
        • S(D)
      • Vars
        • B(b);SBLOCK,XR(E)::QAB(F)
      • Refutation
        • K(g);S_FLIGHT,XR(E)
    • Try
      • R(E);
      • Threat
        • QAB(F)
      • Refutation
        • P(h);
    • Try
      • R(E);
      • Threat
        • B(I)
      • Refutation
        • P(h);
  • Actual
    • R(E);
    • Threat
      • QAB(F)
    • Vars
      • K(g);S_FLIGHT::QAB1(F)
      • S(c);SBLOCK,XP(C)::S(G)
      • S(c);SBLOCK::S(D)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).