MESON Chess Problem Database

Problem Display
PID: 193693 (4n3/8/3pp3/3pk3/N3PR2/8/6QK/4R3 w - - 0 1)

Hawkins, Xenophon

Pittsburgh Gazette-Times, 1915

4n3/8/3pp3/3pk3/N3PR2/8/6QK/4R3

#2

6 + 5

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf4
      • 2.Qg3#
    • 1...dxe4
      • 2.Qxe4#
    • 1...d4
      • 2.Qg5#
  • Tries
    • 1.Qg7+?
      • 1...Kxf4
        • 2.Qg3#
      • 1...Sf6
        • 2.Qxf6#
      • 1...Sxg7!
  • Keys
    • 1.Qg6!
      • 1...Kd4
        • 2.e5#
      • 1...Kxf4
        • 2.Qg3#
      • 1...dxe4
        • 2.Qxe4#
      • 1...Sf6
        • 2.Qxf6#
      • 1...Sc7
        • 2.Qf6#
      • 1...Sg7
        • 2.Qf6#
      • 1...d4
        • 2.Qg5#

There are these versions: 195028

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATEB,S_FLIGHT,XR(F)::QAB1(B)
    • P(a);OGATE,P_SPINP(a),XP(E)::QAR1(B),XP(a)
    • P(a);SBLOCK::QAR2(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);OGATEB,S_FLIGHT,XR(F)::QAB1(B)
        • S(e);N_GUARD,P_SPINS(e)::QAB1(B),XS(e)
      • Refutation
        • S(e);XQ(B)
  • Actual
    • Q(B);
    • Vars
      • K(b);OGATE,S_FLIGHT::R(F)+P(E)
      • K(b);OGATEB,S_FLIGHT,XR(F)::QAB1(B)
      • P(a);OGATE,P_SPINP(a),XP(E)::QAR1(B),XP(a)
      • S(e);N_GUARD::QAB1(B),XS(e)
      • S(e);N_GUARD::QAB1(B)
      • P(a);SBLOCK::QAR2(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).