MESON Chess Problem Database

Problem Display
PID: 199385 (2n4K/3Q3n/5P2/3Nk1p1/R3q1rp/6p1/B7/b1B1R3 w - - 0 1)

Pleasants, L

The Problemist, 1954

2n4K/3Q3n/5P2/3Nk1p1/R3q1rp/6p1/B7/b1B1R3

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bb2
      • 2.Bxb2#
  • Tries
    • 1.Bf4+?
      • 1...gxf4
        • 2.Rexe4#
        • 2.Raxe4#
      • 1...Rxf4!
  • Keys
    • 1.Se3!
      • threat
        • 2.Sxg4#
      • 1...Kf4
        • 2.Qf5#
      • 1...Kxf6
        • 2.Qg7#
      • 1...Qxe3
        • 2.Qe6#
      • 1...Sxf6
        • 2.Sc4#
      • 1...Rf4
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • B(a);N_GUARD::B(A),XB(a)
  • Tries
    • Try
      • B(A);CHECK
      • Refutation
        • R(d);XB(A)
  • Actual
    • S(E);N_PINQ(c)
    • Threat
      • S(E),XR(d)
    • Vars
      • K(f);P_PINP(F),P_SPINQ(c),S_FLIGHT::QAR1(G)
      • K(f);OGATEB,S_FLIGHT,XP(F)::QAB1(G)
      • Q(c);P_SPINQ(c),XS(E)::QAR1(G)
      • S(h);SBLOCK,XP(F)::S(E)
      • R(d);SBLOCK::QAR1(G)
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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).