MESON Chess Problem Database

Problem Display
PID: 159176 (3Q3K/6p1/7k/8/8/6N1/2b5/8 w - - 0 1)

Andersen, Idon Bruno Hovedskou

Aalborg Stiftstidende, 1952

3Q3K/6p1/7k/8/8/6N1/2b5/8

#2

3 + 3

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Bg6
      • 2.Qd2#
    • 1...g6
      • 2.Qh4#
  • Tries
    • 1.Qf6+?
      • 1...Bg6
        • 2.Qf4#
      • 1...g6
        • 2.Qh4#
      • 1...gxf6!
    • 1.Qd4?
      • threat
        • 2.Qxg7#
      • 1...Kg6
        • 2.Qxg7#
      • 1...g6
        • 2.Qh4#
      • 1...Bg6
        • 2.Qe3#
        • 2.Qd2#
        • 2.Qf4#
      • 1...g5
        • 2.Qg7#
      • 1...Kg5!
    • 1.Qf8?
      • threat
        • 2.Qxg7#
      • 1...Kg6
        • 2.Qxg7#
      • 1...Bg6
        • 2.Qf4#
      • 1...Kg5!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qxg7#
      • 1...Kg6
        • 2.Qxg7#
      • 1...g6
        • 2.Qh4#
      • 1...Bg6
        • 2.Qe3#
      • 1...g5
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(a);SBLOCK,S_CUTP(c)::QAB(B)
    • P(c);SBLOCK::QAR2(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • B(a);P_SPINB(a),SBLOCK,S_CUTP(c)::QAB(B)
        • P(c);P_SPINP(c),SBLOCK::QAR2(B)
      • Refutation
        • P(c);XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAB1(B),XP(c)
      • Vars
        • K(b);P-FLIGHT::QAR1(B),XP(c)
        • P(c);SBLOCK::QAR2(B)
        • P(c);::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);P_PINP(c)
      • Threat
        • QAB1(B),XP(c)
      • Vars
        • K(b);N_SPINP(c),P-FLIGHT::QAR1(B),XP(c)
        • B(a);SBLOCK::QAB(B)
      • Refutation
        • K(b);N_SPINP(c),S_FLIGHT
  • Actual
    • Q(B);
    • Threat
      • QAB1(B),XP(c)
    • Vars
      • K(b);P-FLIGHT::QAR1(B),XP(c)
      • P(c);SBLOCK::QAR2(B)
      • B(a);SBLOCK,S_CUTP(c)::QAB(B)
      • P(c);::QAB1(B)
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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).