MESON Chess Problem Database

Problem Display
PID: 73187 (8/3K4/3N4/3k4/3b4/3Q4/8/8 w - - 0 1)

Hume, George

Chess Amateur (The), 1921

8/3K4/3N4/3k4/3b4/3Q4/8/8

#2

3 + 2

5454 Near Snap 2007
3713 Snap 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qb5#
    • 1...Ke5
      • 2.Qf5#
  • Tries
    • 1.Kc7?
      • 1...Kc5
        • 2.Qc4#
        • 2.Qb5#
      • 1...Ke5
        • 2.Qf5#
      • 1...Ke6!
    • 1.Ke7?
      • 1...Kc5
        • 2.Qb5#
      • 1...Ke5
        • 2.Qe4#
        • 2.Qf5#
      • 1...Kc6!
    • 1.Qb3+?
      • 1...Kc5
        • 2.Se4#
        • 2.Sb7#
        • 2.Qb5#
      • 1...Ke5!
    • 1.Qf3+?
      • 1...Ke5
        • 2.Sc4#
        • 2.Sf7#
        • 2.Qf5#
      • 1...Kc5!
  • Keys
    • 1.Qd2!
      • 1...Kc5
        • 2.Qa5#
      • 1...Ke5
        • 2.Qg5#

Anticipated by 2709(0000), 4630(1884)

This anticipates 71344(1924), 79357(1964), 65707(1999)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINB(a),P-FLIGHT::QAR1(A)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(b);N_SPINB(a),P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);N_SPINB(a),S_FLIGHT
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(b);N_SPINB(a),P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);N_SPINB(a),S_FLIGHT
    • Try
      • Q(A);CHECK,N_PINB(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK,N_PINB(a)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);N_SPINB(a),P-FLIGHT::QAR2(A)
HTML5 logo

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).