MESON Chess Problem Database

Problem Display
PID: 247231 (6K1/8/4Np2/2R5/p1ppk1P1/r6Q/b1Pn2N1/8 w - - 0 1)

Rice, John Michael

The Problemist, 1954

6K1/8/4Np2/2R5/p1ppk1P1/r6Q/b1Pn2N1/8

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...c3
      • 2.Qd3#
    • 1...d3
      • 2.Qe3#
    • 1...f5
      • 2.Sg5#
  • Tries
    • 1.Qh5?
      • threat
        • 2.Qd5#
        • 2.Qf5#
      • 1...Rf3
        • 2.Qd5#
      • 1...c3
        • 2.Qf5#
      • 1...f5
        • 2.Sg5#
        • 2.Qxf5#
      • 1...Kf3!
    • 1.Qh7+?
      • 1...f5
        • 2.Sg5#
        • 2.Qxf5#
        • 2.Qb7#
      • 1...Kf3!
  • Keys
    • 1.Rf5!
      • threat
        • 2.Sc5#
      • 1...Sb3
        • 2.Qf3#
      • 1...c3
        • 2.Qd3#
      • 1...d3
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • P(e);N_GUARD,P_PINS(F),S_CUTR(c)::QAB1(C)
    • P(f);N_GUARD,S_CUTR(c)::QAR1(C)
    • P(h);N_GUARD::S(F)
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);SBLOCK::QAB1(C)
        • P(e);P_PINS(F)::QAB1(C)
      • Refutation
        • K(g);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Refutation
        • K(g);S_FLIGHT
  • Actual
    • R(E);
    • Threat
      • S(F)
    • Vars
      • S(b);N_GUARD,S_CUTR(c)::QAB1(C)
      • P(e);N_GUARD,P_PINS(F),S_CUTR(c)::QAB1(C)
      • P(f);N_GUARD,S_CUTR(c)::QAR1(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).