MESON Chess Problem Database

Problem Display
PID: 6960 (k5nb/3Np2n/1K6/2p5/1pP3p1/1p4P1/3P2R1/2Q5 w - - 0 1)

Pickering, SA

Chess, 1935

k5nb/3Np2n/1K6/2p5/1pP3p1/1p4P1/3P2R1/2Q5

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Ba1
      • 2.Qxa1#
    • 1...Shf6
      • 2.Qa1#
    • 1...Sgf6
      • 2.Qa1#
    • 1...e5
      • 2.Qa1#
  • Tries
    • 1.Re2?
      • threat
        • 2.Qh1#
      • 1...Shf6
        • 2.Qa1#
      • 1...Sgf6
        • 2.Qa1#
      • 1...e5
        • 2.Qa1#
      • 1...Sg5!
    • 1.Rh2?
      • threat
        • 2.Qh1#
      • 1...Shf6
        • 2.Qa1#
      • 1...Sgf6
        • 2.Qa1#
      • 1...e5
        • 2.Qa1#
      • 1...Sg5!
    • 1.Qb1?
      • threat
        • 2.Qe4#
      • 1...Shf6
        • 2.Qa1#
      • 1...Sgf6
        • 2.Qa1#
      • 1...Sg5!
    • 1.Qe1?
      • threat
        • 2.Qe4#
      • 1...Shf6
        • 2.Qa1#
      • 1...Sgf6
        • 2.Qa1#
      • 1...Sg5!
    • 1.Qh1?
      • threat
        • 2.Rg1#
        • 2.Re2#
        • 2.Rf2#
        • 2.Rh2#
      • 1...Shf6
        • 2.Qa1#
      • 1...Sgf6
        • 2.Qa1#
      • 1...e5
        • 2.Qa1#
      • 1...Sg5!
  • Keys
    • 1.Rf2!
      • threat
        • 2.Qh1#
      • 1...Sg5
        • 2.Rf8#
      • 1...Shf6
        • 2.Qa1#
      • 1...Sgf6
        • 2.Qa1#
      • 1...e5
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • B(i);N_GUARD::QAB(A),XB(i)
    • S(f);S_CUTB(i)::QAB(A)
    • S(h);S_CUTB(i)::QAB(A)
    • P(e);S_CUTB(i)::QAB(A)
  • Tries
    • Try
      • R(C);
      • Threat
        • QAB(A)
      • Vars
        • S(f);S_CUTB(i)::QAB(A)
        • S(h);S_CUTB(i)::QAB(A)
        • P(e);S_CUTB(i)::QAB(A)
      • Refutation
        • S(f);
    • Try
      • R(C);
      • Threat
        • QAB(A)
      • Vars
        • S(f);S_CUTB(i)::QAB(A)
        • S(h);S_CUTB(i)::QAB(A)
        • P(e);S_CUTB(i)::QAB(A)
      • Refutation
        • S(f);
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • S(f);S_CUTB(i)::QAB(A)
        • S(h);S_CUTB(i)::QAB(A)
      • Refutation
        • S(f);
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • S(f);S_CUTB(i)::QAB(A)
        • S(h);S_CUTB(i)::QAB(A)
      • Refutation
        • S(f);
    • Try
      • Q(A);
      • Threat
        • DUALS(4)
      • Vars
        • S(f);S_CUTB(i)::QAB(A)
        • S(h);S_CUTB(i)::QAB(A)
        • P(e);S_CUTB(i)::QAB(A)
      • Refutation
        • S(f);
  • Actual
    • R(C);
    • Threat
      • QAB(A)
    • Vars
      • S(f);N_GUARD::R(C)
      • S(f);S_CUTB(i)::QAB(A)
      • S(h);S_CUTB(i)::QAB(A)
      • P(e);S_CUTB(i)::QAB(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).