MESON Chess Problem Database

Problem Display
PID: 227471 (8/7k/7N/5K2/2p5/2Q5/8/8 w - - 0 1)

Hultberg, Gustav Herbert

Schackvarlden, 1926

8/7k/7N/5K2/2p5/2Q5/8/8

#2

3 + 2

6490 yacpdb 2020
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxh6
      • 2.Qh8#
  • Tries
    • 1.Qa1?
      • 1...Kxh6
        • 2.Qh8#
      • 1...c3!
    • 1.Qb2?
      • 1...Kxh6
        • 2.Qh8#
      • 1...c3!
    • 1.Qd4?
      • 1...Kxh6
        • 2.Qh8#
      • 1...c3!
    • 1.Qe5?
      • 1...Kxh6
        • 2.Qh8#
      • 1...c3!
    • 1.Qg3?
      • 1...Kxh6
        • 2.Qg6#
      • 1...Kh8
        • 2.Qg8#
      • 1...c3!
  • Keys
    • 1.Kf6!
      • 1...Kxh6
        • 2.Qh3#
      • 1...Kh8
        • 2.Kg6#

Anticipated by 2826(1875), 21927(1922)

This anticipates 90326(1964)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT,XS(C)::QAR2(A)
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT,XS(C)::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT,XS(C)::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT,XS(C)::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT,XS(C)::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT,XS(C)::QAR1(A)
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • P(a);
  • Actual
    • K(B);P-FLIGHT
    • Vars
      • K(b);OGATEB,P-FLIGHT,XS(C)::QAR(A)
      • K(b);P-FLIGHT::QAB(A)+K(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).