MESON Chess Problem Database

Problem Display
PID: 135631 (5B2/5pPk/2Q5/7N/8/8/4K3/8 w - - 0 1)

Lincoln, Robert A

StrateGems, 2010

5B2/5pPk/2Q5/7N/8/8/4K3/8

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Kg8
      • 2.Sf6#
  • Tries
    • 1.Sf6+?
      • 1...Kh6
        • 2.g8Q#
        • 2.g8R#
      • 1...Kg6!
    • 1.Qg2?
      • threat
        • 2.g8Q#
      • 1...Kg8
        • 2.Sf6#
      • 1...Kh6!
    • 1.Qe6?
      • 1...Kg8
        • 2.Sf6#
      • 1...f6
        • 2.g8Q#
      • 1...f5
        • 2.g8Q#
      • 1...fxe6!
    • 1.Qh6+?
      • 1...Kg8
        • 2.Sf6#
        • 2.Qh8#
      • 1...Kxh6!
    • 1.g8R?
      • threat
        • 2.Sf6#
      • 1...f6
        • 2.Sxf6#
      • 1...Kxg8!
  • Keys
    • 1.Qd5!
      • 1...Kg6
        • 2.g8Q#
      • 1...Kh6
        • 2.g8Q#
      • 1...Kg8
        • 2.Sf6#
      • 1...f5
        • 2.g8Q#
      • 1...f6
        • 2.g8Q#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::S(B)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(b);P-FLIGHT::P=Q
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • P=Q
      • Vars
        • K(b);S_FLIGHT::S(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT::S(B)
        • P(a);::P=Q
      • Refutation
        • P(a);XQ(C)
    • Try
      • Q(C);CHECK
      • Refutation
        • K(b);P-FLIGHT,XQ(C)
    • Try
      • P(D);
      • Threat
        • S(B)
      • Vars
        • P(a);::S(B),XP(a)
      • Refutation
        • K(b);S_FLIGHT,XR(D)
  • Actual
    • Q(C);
    • Vars
      • K(b);S_FLIGHT::P=Q
      • K(b);P-FLIGHT::P=Q
      • K(b);P_SPINP(a),S_FLIGHT::S(B)
      • P(a);::P=Q
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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).