MESON Chess Problem Database

Problem Display
PID: 51409 (r7/p2R2NN/Qb4k1/3p3R/1r3p2/1P3p2/8/7K w - - 0 1)

Peake, JL

Manchester Guardian, 1959

r7/p2R2NN/Qb4k1/3p3R/1r3p2/1P3p2/8/7K

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...d4
      • 2.Qd3#
  • Tries
    • 1.Sf8+?
      • 1...Kf6
        • 2.Rf5#
      • 1...Rxf8!
    • 1.Rg5+?
      • 1...Kh6
        • 2.Sf5#
      • 1...Kxh7!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qf6#
      • 1...Rd4
        • 2.Qg1#
      • 1...Rf8
        • 2.Sxf8#
      • 1...Bd4
        • 2.Qb1#
      • 1...Bd8
        • 2.Sf8#
      • 1...d4
        • 2.Qg1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(d);S_CUTR(b)::QAB(D)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(f);P-FLIGHT::R1(C)
      • Refutation
        • R(h);XS(G)
    • Try
      • R(C);CHECK
      • Vars
        • K(f);P-FLIGHT::S(F)
      • Refutation
        • K(f);N_SPINB(e),S_FLIGHT,XS(G)
  • Actual
    • Q(D);N_PINB(e)
    • Threat
      • QAR1(D)
    • Vars
      • R(b);S_CUTB(e)::QAR(D)
      • R(h);N_GUARD::S(G),XR(h)
      • B(e);S_CUTR(b)::QAB(D)
      • B(e);S_CUTR(h)::S(G)
      • P(d);S_CUTB(e)::QAR(D)
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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).