MESON Chess Problem Database

Problem Display
PID: 213163 (8/8/1Qp5/2K5/k7/8/n7/1b6 w - - 0 1)

Lokker, Miklosh S

Land og Folk, 1969

8/8/1Qp5/2K5/k7/8/n7/1b6

#2

2 + 4

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Qb4#
    • 1...Sc3
      • 2.Qb4#
    • 1...Sb4
      • 2.Qxb4#
  • Tries
    • 1.Kc4?
      • threat
        • 2.Qa7#
        • 2.Qa6#
      • 1...Ka3
        • 2.Qb3#
      • 1...Sb4
        • 2.Qxb4#
      • 1...Bd3+!
    • 1.Qxb1?
      • threat
        • 2.Qxa2#
      • 1...Ka5
        • 2.Qxa2#
      • 1...Sc1
        • 2.Qb4#
      • 1...Sc3
        • 2.Qb4#
      • 1...Sb4
        • 2.Qxb4#
      • 1...Ka3!
    • 1.Qb3+?
      • 1...Ka5
        • 2.Qa3#
      • 1...Kxb3!
  • Keys
    • 1.Qb2!
      • 1...Ka5
        • 2.Qa3#
      • 1...Bc2
        • 2.Qxa2#
      • 1...Bd3
        • 2.Qxa2#
      • 1...Be4
        • 2.Qxa2#
      • 1...Bf5
        • 2.Qxa2#
      • 1...Bg6
        • 2.Qxa2#
      • 1...Bh7
        • 2.Qxa2#
      • 1...Sc1
        • 2.Qb4#
      • 1...Sc3
        • 2.Qb4#
      • 1...Sb4
        • 2.Qxb4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD::QAR1(B)
    • S(b);N_GUARD::QAR1(B),XS(b)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT::QAR1(B)
        • S(b);N_GUARD::QAR1(B),XS(b)
      • Refutation
        • B(a);CHECK
    • Try
      • Q(B);XB(a)
      • Threat
        • QAR2(B),XS(b)
      • Vars
        • K(c);P-FLIGHT::QAR(B),XS(b)
        • S(b);N_GUARD::QAR1(B)
        • S(b);N_GUARD::QAR1(B),XS(b)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR2(B)
      • Refutation
        • K(c);S_FLIGHT,XQ(B)
  • Actual
    • Q(B);
    • Vars
      • K(c);P-FLIGHT::QAR2(B)
      • B(a);N_GUARD::QAR2(B),XS(b)
      • S(b);N_GUARD::QAR1(B)
      • S(b);N_GUARD::QAR1(B),XS(b)
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).