MESON Chess Problem Database

Problem Display
PID: 272070 (1N4Q1/1Bp3K1/1n1pp3/4kp2/2r1p3/3nP3/8/3R1R2 w - - 0 1)

Hillary, T

The Problemist, 1957

1N4Q1/1Bp3K1/1n1pp3/4kp2/2r1p3/3nP3/8/3R1R2

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sf4
      • 2.exf4#
    • 1...Sc5
      • 2.Sc6#
    • 1...Sa4
      • 2.Sd7#
    • 1...Sd5
      • 2.Sd7#
    • 1...Sd7
      • 2.Sxd7#
    • 1...Sa8
      • 2.Sd7#
    • 1...Sc8
      • 2.Sd7#
  • Tries
    • 1.Sc6+?
      • 1...Kd5
        • 2.Rxf5#
      • 1...Rxc6!
    • 1.Rxf5+?
      • 1...exf5
        • 2.Qe8#
      • 1...Kxf5!
  • Keys
    • 1.Bd5!
      • threat
        • 2.Qxe6#
      • 1...Kxd5
        • 2.Rxf5#
      • 1...Sxd5
        • 2.Sd7#
      • 1...exd5
        • 2.Qe8#
      • 1...Sf4
        • 2.exf4#
      • 1...Sc5
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • S(a);OGATE::P(C),XS(a)
    • S(a);S_CUTR(b)::S(F)
    • S(f);N_GUARD::S(F)
    • S(f);N_GUARD::S(F),XS(f)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(d);N_GUARD,P-FLIGHT,P_SPINP(h),P_SPINS(a)::R(B),XP(e)
      • Refutation
        • R(b);XS(F)
    • Try
      • R(B);CHECK,XP(e)
      • Vars
        • P(h);SBLOCK,XR(B)::QAR(G)
      • Refutation
        • K(d);P-FLIGHT,XR(B)
  • Actual
    • B(D);
    • Threat
      • QAR1(G),XP(h)
    • Vars
      • K(d);N_GUARD,P-FLIGHT,P_SPINP(h),P_SPINS(a),XB(D)::R(B),XP(e)
      • S(f);N_GUARD,SBLOCK,XB(D)::S(F)
      • P(h);OGATEB,SBLOCK,XB(D)::QAR(G)
      • S(a);OGATE::P(C),XS(a)
      • S(a);S_CUTR(b)::S(F)
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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).