MESON Chess Problem Database

Problem Display
PID: 271017 (1b6/1Q2p1K1/rp3p1N/Rn4pk/qr2R2p/1pp5/6N1/3b4 w - - 0 1)

Stanley, Charles Henry

The Problemist, 1956

1b6/1Q2p1K1/rp3p1N/Rn4pk/qr2R2p/1pp5/6N1/3b4

#2

6 + 14

SOLUTION

  • SOUND
  • Sets
    • 1...Sd4
      • 2.Rxh4#
    • 1...Sd6
      • 2.Sf4#
    • 1...Sc7
      • 2.Sf4#
    • 1...e5
      • 2.Qf7#
    • 1...e6
      • 2.Qf7#
  • Tries
    • 1.Qd5?
      • threat
        • 2.Qf7#
      • 1...Sd6
        • 2.Sf4#
        • 2.Qxd1#
      • 1...e6!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qe8#
      • 1...g4
        • 2.Qf5#
      • 1...Sa3
        • 2.Qxd1#
      • 1...Sd4
        • 2.Rxh4#
      • 1...Sd6
        • 2.Sf4#
      • 1...Sa7
        • 2.Qxd1#
      • 1...Sc7
        • 2.Sf4#
        • 2.Qxd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(g);P_SPINP(h),S_CUTR(e)::R1(B),XP(f)
    • S(g);P_SPINP(h),S_CUTB(n)::S(A)
    • P(m);OGATE::QAB(E)
  • Tries
    • Try
      • Q(E);P_PINP(h)
      • Threat
        • QAB(E)
      • Refutation
        • P(m);
  • Actual
    • Q(E);
    • Threat
      • QAB(E)
    • Vars
      • P(h);OGATEB,P_SPINS(g)::QAR2(E)
      • S(g);P_SPINP(h)::QAB(E),XB(a)
      • S(g);P_SPINP(h),S_CUTR(e)::R1(B),XP(f)
      • S(g);P_SPINP(h),S_CUTB(n)::S(A)
      • S(g);P_SPINP(h),SBLOCK::QAB(E),XB(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).