MESON Chess Problem Database

Problem Display
PID: 107155 (K7/8/5N2/4pk2/7B/8/8/7Q w - - 0 1)

Lokker, Miklosh S

De Waarheid, 1967

K7/8/5N2/4pk2/7B/8/8/7Q

#2

4 + 2

6490 yacpdb 2009
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Qe4#
    • 1...e4
      • 2.Qxe4#
  • Tries
    • 1.Qg2?
      • threat
        • 2.Qg4#
      • 1...Kf4
        • 2.Qe4#
        • 2.Qf2#
      • 1...e4
        • 2.Qxe4#
      • 1...Ke6!
    • 1.Qd5?
      • 1...Kf4
        • 2.Qe4#
      • 1...Kg6!
    • 1.Qc6?
      • 1...Kf4
        • 2.Qe4#
      • 1...e4
        • 2.Qxe4#
      • 1...Kg6!
    • 1.Qb1+?
      • 1...Kf4
        • 2.Qe4#
      • 1...e4
        • 2.Qxe4#
      • 1...Ke6!
  • Keys
    • 1.Qb7!
      • 1...Kf4
        • 2.Qe4#
      • 1...Ke6
        • 2.Qd7#
      • 1...Kg6
        • 2.Qh7#
      • 1...e4
        • 2.Qxe4#

Anticipated by 2840(1886)

This anticipates 116810(1990)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR1(A)
    • P(a);::QAB1(A),XP(a)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • P(a);::QAB1(A),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);P_PINP(a)
      • Vars
        • K(b);N_SPINP(a),P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
        • P(a);::QAB1(A),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
        • P(a);P_SPINP(a)::QAB1(A),XP(a)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);P-FLIGHT::QAR1(A)
      • K(b);S_FLIGHT::QAB1(A)
      • P(a);::QAB1(A),XP(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).