MESON Chess Problem Database

Problem Display
PID: 215982 (8/6k1/5N1N/3Q4/8/6K1/8/8 w - - 0 1)

Keirans, Peteris

Funkschach, 1926

8/6k1/5N1N/3Q4/8/6K1/8/8

#2

4 + 1

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kf8
      • 2.Qf7#
    • 1...Kh8
      • 2.Qg8#
  • Tries
    • 1.Kg4?
      • 1...Kg6
        • 2.Qg5#
      • 1...Kxh6
        • 2.Qg5#
      • 1...Kf8
        • 2.Qf7#
      • 1...Kh8
        • 2.Qg8#
      • 1...Kxf6!
    • 1.Kh4?
      • 1...Kg6
        • 2.Qg5#
      • 1...Kxh6
        • 2.Qg5#
      • 1...Kf8
        • 2.Qf7#
      • 1...Kh8
        • 2.Qg8#
      • 1...Kxf6!
    • 1.Sfg4?
      • threat
        • 2.Qg8#
      • 1...Kh7
        • 2.Qg8#
      • 1...Kf8
        • 2.Qf7#
      • 1...Kh8
        • 2.Qg8#
      • 1...Kg6!
    • 1.Qf7+?
      • 1...Kh8
        • 2.Qg8#
        • 2.Qh7#
        • 2.Qf8#
      • 1...Kxh6!
    • 1.Qg5+?
      • 1...Kh8
        • 2.Sf7#
        • 2.Qg8#
      • 1...Kf8!
    • 1.Qh5?
      • 1...Kf8
        • 2.Qf7#
      • 1...Kh8
        • 2.Sf5#
      • 1...Kxf6!
  • Keys
    • 1.Kf4!
      • 1...Kxf6
        • 2.Qf7#
      • 1...Kg6
        • 2.Qg5#
      • 1...Kxh6
        • 2.Qg5#
      • 1...Kf8
        • 2.Qf7#
      • 1...Kh8
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAR1(B)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
        • K(a);S_FLIGHT,XS(D)::QAB1(B)
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
    • Try
      • K(A);S_FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
        • K(a);S_FLIGHT,XS(D)::QAB1(B)
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
    • Try
      • S(C);
      • Threat
        • QAR1(B)
      • Vars
        • K(a);P-FLIGHT::QAB1(B)
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);S_FLIGHT,XS(D)
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
        • K(a);S_FLIGHT::QAR(B)+S(D)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
  • Actual
    • K(A);S_FLIGHT
    • Vars
      • K(a);S_FLIGHT,XS(C)::QAR1(B)
      • K(a);P-FLIGHT::QAR1(B)
      • K(a);S_FLIGHT,XS(D)::QAB1(B)
      • K(a);S_FLIGHT::QAR1(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).