MESON Chess Problem Database

Problem Display
PID: 981 (8/8/8/8/6p1/3p2p1/3P2PP/Q4K1k w - - 0 1)

Nymian, HS

The Problemist Supplement, 1995

8/8/8/8/6p1/3p2p1/3P2PP/Q4K1k

#2

5 + 4

3713 Snap 2007
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxh2
      • 2.Qh8#
    • 1...gxh2
      • 2.Kf2#
  • Tries
    • 1.Qb2?
      • 1...Kxh2
        • 2.Qh8#
      • 1...gxh2!
    • 1.Qc3?
      • 1...Kxh2
        • 2.Qh8#
      • 1...gxh2!
    • 1.Qd4?
      • threat
        • 2.Qg1#
      • 1...Kxh2
        • 2.Qg1#
        • 2.Qh8#
      • 1...gxh2!
    • 1.Qe5?
      • 1...Kxh2
        • 2.Qh8#
        • 2.Qh5#
      • 1...gxh2!
    • 1.Qf6?
      • 1...Kxh2
        • 2.Qh4#
        • 2.Qh8#
        • 2.Qh6#
      • 1...gxh2!
    • 1.Qg7?
      • 1...Kxh2
        • 2.Qh6#
        • 2.Qh8#
        • 2.Qh7#
      • 1...gxh2!
    • 1.Qb1?
      • 1...gxh2
        • 2.Kf2#
      • 1...Kxh2!
    • 1.Qc1?
      • 1...gxh2
        • 2.Kf2#
      • 1...Kxh2!
    • 1.Qd1?
      • 1...gxh2
        • 2.Kf2#
      • 1...Kxh2!
    • 1.Qe1?
      • 1...gxh2
        • 2.Kf2#
      • 1...Kxh2!
    • 1.Qa5?
      • 1...Kxh2
        • 2.Qh5#
      • 1...gxh2!
    • 1.Qa6?
      • 1...Kxh2
        • 2.Qh6#
      • 1...gxh2!
    • 1.Qa7?
      • threat
        • 2.Qg1#
      • 1...Kxh2
        • 2.Qg1#
        • 2.Qh7#
      • 1...gxh2!
  • Keys
    • 1.Qa8!
      • 1...Kxh2
        • 2.Qh8#
      • 1...gxh2
        • 2.g3#

Anticipated by 10271(1963)

This anticipates 245081(2006)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);OGATEB,P-FLIGHT,XP(E)::QAR(A)
    • P(c);SBLOCK,XP(E)::QAR(A)+K(B)
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(E)::QAR(A)
      • Refutation
        • P(c);XP(E)
    • Try
      • Q(A);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(E)::QAR(A)
      • Refutation
        • P(c);XP(E)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Refutation
        • P(c);XP(E)
    • Try
      • Q(A);
      • Refutation
        • P(c);XP(E)
    • Try
      • Q(A);
      • Refutation
        • P(c);XP(E)
    • Try
      • Q(A);
      • Refutation
        • P(c);XP(E)
    • Try
      • Q(A);
      • Vars
        • P(c);SBLOCK,XP(E)::QAR(A)+K(B)
      • Refutation
        • K(a);P-FLIGHT,XP(E)
    • Try
      • Q(A);
      • Vars
        • P(c);SBLOCK,XP(E)::QAR(A)+K(B)
      • Refutation
        • K(a);P-FLIGHT,XP(E)
    • Try
      • Q(A);
      • Vars
        • P(c);SBLOCK,XP(E)::QAR(A)+K(B)
      • Refutation
        • K(a);P-FLIGHT,XP(E)
    • Try
      • Q(A);
      • Vars
        • P(c);SBLOCK,XP(E)::QAR(A)+K(B)
      • Refutation
        • K(a);P-FLIGHT,XP(E)
    • Try
      • Q(A);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(E)::QAR(A)
      • Refutation
        • P(c);XP(E)
    • Try
      • Q(A);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(E)::QAR(A)
      • Refutation
        • P(c);XP(E)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Refutation
        • P(c);XP(E)
  • Actual
    • Q(A);
    • Vars
      • K(a);OGATEB,P-FLIGHT,XP(E)::QAR(A)
      • P(c);OGATE,SBLOCK,XP(E)::QAB(A)+P(D)
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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).