MESON Chess Problem Database

Problem Display
PID: 42536 (5K1k/7p/4pN2/8/3n3Q/8/8/1b6 w - - 0 1)

Groeneveld, Cornelis

Problem Observer, 2002

5K1k/7p/4pN2/8/3n3Q/8/8/1b6

#2

3 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Ba2
      • 2.Qxh7#
    • 1...Sc2
      • 2.Qxh7#
    • 1...Sf5
      • 2.Qxh7#
  • Tries
    • 1.Se4?
      • threat
        • 2.Qf6#
      • 1...h5
        • 2.Qxh5#
      • 1...h6
        • 2.Qxh6#
      • 1...Sf5!
    • 1.Qg3?
      • threat
        • 2.Qg7#
        • 2.Qg8#
      • 1...Sf5
        • 2.Qg8#
      • 1...Bg6!
    • 1.Qg5?
      • threat
        • 2.Qg7#
        • 2.Qg8#
      • 1...Sf5
        • 2.Qg8#
      • 1...Bg6!
    • 1.Qg4?
      • threat
        • 2.Qg7#
        • 2.Qg8#
      • 1...Sf5
        • 2.Qg8#
      • 1...Bg6!
  • Keys
    • 1.Qh6!
      • threat
        • 2.Qg7#
      • 1...Sf5
        • 2.Qxh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • B(a);N_GUARD::QAR1(A),XP(d)
    • S(b);S_CUTB(a)::QAR1(A),XP(d)
  • Tries
    • Try
      • S(B);
      • Threat
        • QAB(A)
      • Vars
        • P(d);OGATEB::QAR(A),XP(d)
        • P(d);OGATEB::QAR2(A),XP(d)
      • Refutation
        • S(b);
    • Try
      • Q(A);N_PINP(d)
      • Threat
        • DUALS(2)
      • Vars
        • S(b);::QAR1(A)
      • Refutation
        • B(a);
    • Try
      • Q(A);N_PINP(d)
      • Threat
        • DUALS(2)
      • Vars
        • S(b);::QAR1(A)
      • Refutation
        • B(a);
    • Try
      • Q(A);N_PINP(d)
      • Threat
        • DUALS(2)
      • Vars
        • S(b);::QAR1(A)
      • Refutation
        • B(a);
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • S(b);S_CUTB(a)::QAR1(A),XP(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).