MESON Chess Problem Database

Problem Display
PID: 262372 (8/8/1K1N1p2/4k3/5N2/8/5P2/6Q1 w - - 0 1)

Panaget, B

Europe Echecs, 1998

8/8/1K1N1p2/4k3/5N2/8/5P2/6Q1

#2

5 + 2

5454 Near Snap 2022
6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qa1#
    • 1...Kxf4
      • 2.Qg3#
  • Tries
    • 1.Kc5?
      • 1...Kxf4
        • 2.Qg3#
      • 1...f5!
    • 1.Kc6?
      • 1...Kd4
        • 2.Qa1#
      • 1...Kxf4
        • 2.Qg3#
      • 1...f5!
    • 1.Qc1?
      • 1...Kd4
        • 2.Qb2#
        • 2.Qe3#
        • 2.Qa1#
        • 2.Qc5#
      • 1...Kxd6
        • 2.Qc7#
      • 1...f5!
    • 1.Qe1+?
      • 1...Kd4
        • 2.Qa1#
        • 2.Qe3#
      • 1...Kxd6
        • 2.Qe6#
      • 1...Kxf4!
  • Keys
    • 1.Qg7!
      • 1...Kd4
        • 2.Qxf6#
      • 1...Kxf4
        • 2.Qg3#
      • 1...Kxd6
        • 2.Qc7#

Anticipated by 214456(1878)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);N_GUARD,S_FLIGHT::QAB(A)
    • K(a);OGATEB,S_FLIGHT,XS(C)::QAB1(A)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Vars
        • K(a);OGATEB,S_FLIGHT,XS(C)::QAB1(A)
      • Refutation
        • P(b);
    • Try
      • K(D);P-FLIGHT
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB(A)
        • K(a);OGATEB,S_FLIGHT,XS(C)::QAB1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Vars
        • K(a);OGATEB,S_FLIGHT,XS(E)::QAB1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XS(E)::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
  • Actual
    • Q(A);P_PINP(b)
    • Vars
      • K(a);N_GUARD,S_FLIGHT::QAB(A),XP(b)
      • K(a);N_SPINP(b),OGATEB,S_FLIGHT,XS(C)::QAB1(A)
      • K(a);N_SPINP(b),OGATEB,S_FLIGHT,XS(E)::QAB1(A)
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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).