MESON Chess Problem Database

Problem Display
PID: 21826 (3Q4/8/1K1Rp1rp/4kP1P/4N3/6P1/8/4R3 w - - 0 1)

Beechey, H

Good Companions (March), 1921

3Q4/8/1K1Rp1rp/4kP1P/4N3/6P1/8/4R3

#2

8 + 4

3132 The Good Companion Two-Mover 1922
14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Rg4
      • 2.Qf6#
    • 1...Rg5
      • 2.Qf6#
    • 1...Rf6
      • 2.Qxf6#
    • 1...Rg7
      • 2.Qf6#
    • 1...Rg8
      • 2.Qf6#
    • 1...exf5
      • 2.Sd2#
      • 2.Sf2#
      • 2.Sc3#
      • 2.Sc5#
      • 2.Sg5#
      • 2.Sf6#
  • Tries
    • 1.Qh4?
      • threat
        • 2.Qf4#
      • 1...Kxf5
        • 2.Qf4#
      • 1...Rg4
        • 2.Qf6#
      • 1...Rxg3!
    • 1.Qf8?
      • threat
        • 2.Sd2#
        • 2.Sf2#
        • 2.Sc3#
        • 2.Sc5#
        • 2.Sg5#
      • 1...Rf6
        • 2.Qxf6#
      • 1...Rg4
        • 2.Qf6#
      • 1...Rg5
        • 2.Sd2#
        • 2.Sf2#
        • 2.Sc3#
        • 2.Sc5#
        • 2.Sxg5#
        • 2.Qf6#
      • 1...Rxg3!
  • Keys
    • 1.Rd4!
      • 1...exf5+
        • 2.Sf6#
      • 1...Kxf5
        • 2.Sd6#
      • 1...Rxg3
        • 2.Sxg3#
      • 1...Rg4
        • 2.Qf6#
      • 1...Rg5
        • 2.Qf6#
      • 1...Rf6
        • 2.Qxf6#
      • 1...Rg7
        • 2.Qf6#
      • 1...Rg8
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(c);N_GUARD::QAB1(H)
    • R(c);N_GUARD::QAB1(H),XR(c)
  • Tries
    • Try
      • Q(H);
      • Threat
        • QAB1(H)
      • Vars
        • K(a);P-FLIGHT,XP(D)::QAR1(H)
        • R(c);N_GUARD::QAB1(H)
      • Refutation
        • R(c);XP(B)
    • Try
      • Q(H);
      • Threat
        • DUALS(5)
      • Vars
        • R(c);N_GUARD::QAB1(H),XR(c)
        • R(c);N_GUARD::QAB1(H)
      • Refutation
        • R(c);XP(B)
  • Actual
    • R(G);
    • Vars
      • P(b);CHECK,SBLOCK,XP(D)::R(A)+S(C)
      • K(a);P-FLIGHT,XP(D)::S(C)
      • R(c);XP(B)::R(A)+S(C),XR(c)
      • R(c);N_GUARD::QAB1(H)
      • R(c);N_GUARD::QAB1(H),XR(c)
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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).