MESON Chess Problem Database

Problem Display
PID: 51293 (KnR2q2/8/N3R3/3k1P2/1p2n3/b5pQ/4N3/3r4 w - - 0 1)

Sumner, Christopher Richard Benson

Manchester Guardian, 1956

KnR2q2/8/N3R3/3k1P2/1p2n3/b5pQ/4N3/3r4

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf5
      • 2.Qxf5#
    • 1...Rd4
      • 2.Sf4#
    • 1...Sd6
      • 2.Rc5#
    • 1...g2
      • 2.Qb3#
  • Tries
    • 1.Qg2?
      • threat
        • 2.Qxe4#
      • 1...Rd4
        • 2.Sf4#
      • 1...Qxf5!
    • 1.Qh4?
      • threat
        • 2.Qxe4#
      • 1...Rd4
        • 2.Sf4#
      • 1...Sd2
        • 2.Qd4#
      • 1...Sf2
        • 2.Qc4#
      • 1...Sc3
        • 2.Qc4#
      • 1...Sc5
        • 2.Sc7#
      • 1...Sg5
        • 2.Qc4#
      • 1...Sd6
        • 2.Rc5#
      • 1...Sf6
        • 2.Qc4#
      • 1...Qxf5!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qxe4#
      • 1...Qxf5
        • 2.Qxf5#
      • 1...Rd4
        • 2.Sf4#
      • 1...Sd2
        • 2.Qd4#
      • 1...Sf2
        • 2.Qc4#
      • 1...Sc3
        • 2.Qc4#
      • 1...Sc5
        • 2.Sc7#
      • 1...Sg5
        • 2.Qc4#
      • 1...Sd6
        • 2.Rc5#
      • 1...Sf6
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • Q(h);OGATE,XP(C)::QAR2(B),XQ(h)
    • R(a);SBLOCK::S(A)
    • S(e);N_GUARD,S_CUTQ(h)::R1(G)
    • P(c);OGATE::QAB(B)
  • Tries
    • Try
      • Q(B);P_PINS(e)
      • Threat
        • QAB1(B),XS(e)
      • Vars
        • R(a);SBLOCK::S(A)
      • Refutation
        • Q(h);XP(C)
    • Try
      • Q(B);
      • Threat
        • QAB1(B),XS(e)
      • Vars
        • R(a);SBLOCK::S(A)
        • S(e);OGATE::QAR1(B)
        • S(e);OGATE::QAB1(B)
        • S(e);SBLOCK::S(D)
        • S(e);N_GUARD,S_CUTQ(h)::R1(G)
      • Refutation
        • Q(h);XP(C)
  • Actual
    • Q(B);
    • Threat
      • QAB1(B),XS(e)
    • Vars
      • Q(h);OGATE,XP(C)::QAR2(B),XQ(h)
      • R(a);SBLOCK::S(A)
      • S(e);OGATE::QAR1(B)
      • S(e);OGATE::QAB1(B)
      • S(e);SBLOCK::S(D)
      • S(e);N_GUARD,S_CUTQ(h)::R1(G)
HTML5 logo

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).