MESON Chess Problem Database

Problem Display
PID: 2577 (n1N1Kn2/2p5/P1k5/2p1Q3/P7/2P5/7B/6Nq w - - 0 1)

Narraway, James Ephraim

Source?, 0000

n1N1Kn2/2p5/P1k5/2p1Q3/P7/2P5/7B/6Nq

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Qxe4#
    • 1...Qxg1
      • 2.Qe4#
    • 1...Qxh2
      • 2.Qe4#
    • 1...Sb6
      • 2.Sa7#
      • 2.Se7#
    • 1...Se6
      • 2.Qxe6#
    • 1...Sg6
      • 2.Qe6#
    • 1...Sd7
      • 2.Qe6#
    • 1...Sh7
      • 2.Qe6#
    • 1...c4
      • 2.Qb5#
  • Tries
    • 1.Qf6+?
      • 1...Se6
        • 2.Qxe6#
      • 1...Kd5!
  • Keys
    • 1.Qe2!
      • 1...Qe4+
        • 2.Qxe4#
      • 1...Kd5
        • 2.Se7#
      • 1...Qxg1
        • 2.Qf3#
        • 2.Qe4#
      • 1...Qxh2
        • 2.Qf3#
        • 2.Qe4#
      • 1...c4
        • 2.Qxc4#
      • 1...Qg2
        • 2.Qxg2#
      • 1...Qf3
        • 2.Qxf3#
      • 1...Qd5
        • 2.Qb5#
      • 1...Sb6
        • 2.Se7#
      • 1...Se6
        • 2.Qxe6#
      • 1...Sg6
        • 2.Qe6#
      • 1...Sd7
        • 2.Qe6#
      • 1...Sh7
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • Q(a);N_GUARD,P_PINQ(E)::QAB(E),XQ(a)
    • Q(a);N_GUARD,XS(A)::QAB(E)
    • Q(a);N_GUARD,XB(B)::QAB(E)
    • S(f);N_GUARD::QAR2(E),XS(f)
    • S(f);N_GUARD::QAR2(E)
    • P(b);OGATE::QAB1(E)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAR2(E),XS(f)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(E);
    • Vars
      • Q(a);CHECK,N_GUARD::QAB(E),XQ(a)
      • K(c);S_FLIGHT::S(G)
      • P(b);OGATEB::QAR2(E),XP(b)
      • Q(a);N_GUARD::QAB(E),XQ(a)
      • Q(a);SBLOCK::QAB1(E)
      • S(e);SBLOCK::S(G)
      • S(f);N_GUARD::QAR2(E),XS(f)
      • S(f);N_GUARD::QAR2(E)
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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).