MESON Chess Problem Database

Problem Display
PID: 51337 (8/8/R2Np2R/3pk3/KN3r2/7n/4P2B/b2Q4 w - - 0 1)

Peake, JL

Manchester Guardian, 1957

8/8/R2Np2R/3pk3/KN3r2/7n/4P2B/b2Q4

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Bd4
      • 2.Sd3#
  • Tries
    • 1.Sf7+?
      • 1...Ke4
        • 2.Qd3#
      • 1...Kf5!
    • 1.Qd2?
      • threat
        • 2.Qe3#
      • 1...Bd4
        • 2.Sd3#
      • 1...Sf2
        • 2.Bxf4#
        • 2.Qxf4#
      • 1...Sg5
        • 2.Bxf4#
        • 2.Qxf4#
      • 1...d4!
    • 1.Qd3?
      • threat
        • 2.Sf7#
        • 2.Qe3#
      • 1...Bd4
        • 2.Sf7#
      • 1...Sf2
        • 2.Sf7#
      • 1...d4
        • 2.Sc4#
        • 2.Sf7#
        • 2.Qe4#
        • 2.Qb5#
      • 1...Sg5!
    • 1.Qd4+?
      • 1...Bxd4
        • 2.Sd3#
      • 1...Kxd4!
  • Keys
    • 1.Qc1!
      • threat
        • 2.Qe3#
      • 1...Kd4
        • 2.Sc6#
      • 1...Bd4
        • 2.Sd3#
      • 1...Sf2
        • 2.Qxf4#
      • 1...Sg5
        • 2.Qxf4#
      • 1...d4
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(a);N_PINS(E),SBLOCK::S(E)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(e);N_PINS(E),N_SPINR(c),P-FLIGHT::QAB1(A)
      • Refutation
        • K(e);N_SPINR(c),P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • B(a);N_PINS(E),SBLOCK::S(E)
      • Refutation
        • P(d);N_PINS(E)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);N_PINS(E)::S(G)
        • S(b);::S(G)
      • Refutation
        • S(b);
    • Try
      • Q(A);CHECK,N_SPINS(E)
      • Vars
        • B(a);SBLOCK,XQ(A)::S(E)
      • Refutation
        • K(e);N_SPINR(c),S_FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • K(e);N_PINS(E),N_SPINR(c),S_FLIGHT::S(E)
      • B(a);N_PINS(E),SBLOCK::S(E)
      • S(b);N_GUARD::QAB1(A),XR(c)
      • P(d);N_PINS(E),OGATEB::QAR2(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).