MESON Chess Problem Database

Problem Display
PID: 223146 (8/4Q3/K1NN2n1/p7/B7/3krp2/2R5/4n1q1 w - - 0 1)

Moller, J?

Tidskrift for Schack, 1910

8/4Q3/K1NN2n1/p7/B7/3krp2/2R5/4n1q1

#2

6 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Qxe4#
  • Tries
    • 1.Sb4+?
      • 1...Kd4
        • 2.Sb5#
        • 2.Sf5#
        • 2.Rc4#
      • 1...axb4!
    • 1.Qb7?
      • threat
        • 2.Qb3#
        • 2.Qb5#
      • 1...Re2
        • 2.Qb3#
      • 1...Re4
        • 2.Qb3#
      • 1...Re5
        • 2.Qb3#
      • 1...Re6
        • 2.Qb3#
      • 1...Re7
        • 2.Qb3#
      • 1...Re8
        • 2.Qb3#
      • 1...Qg4
        • 2.Qb3#
      • 1...Qg5
        • 2.Qb3#
      • 1...Se5
        • 2.Qb3#
      • 1...Sxc2!
  • Keys
    • 1.Se4!
      • threat
        • 2.Sc5#
      • 1...Rxe4
        • 2.Qa3#
      • 1...Sxc2
        • 2.Bb5#
      • 1...Re2
        • 2.Rc3#
      • 1...Qg5
        • 2.Sf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(d);N_GUARD::QAB1(F),XR(d)
  • Tries
    • Try
      • S(D);CHECK
      • Refutation
        • P(f);XS(D)
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • R(d);::QAR2(F)
        • Q(b);::QAR2(F)
        • S(g);::QAR2(F)
      • Refutation
        • S(a);XR(A)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • R(d);SBLOCK,XS(E)::QAR(F)
      • S(a);SBLOCK,XR(A)::B(B)
      • R(d);SBLOCK::R1(A)
      • Q(b);N_GUARD::S(E)
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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).