MESON Chess Problem Database

Problem Display
PID: 27357 (8/4nn2/8/8/4kN2/3N4/5K2/Q7 w - - 0 1)

Neyndorff, Luke

StrateGems, 2001

8/4nn2/8/8/4kN2/3N4/5K2/Q7

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Se5
      • 2.Qxe5#
    • 1...Sg5
      • 2.Qe5#
    • 1...Sd6
      • 2.Qe5#
    • 1...Sh6
      • 2.Qe5#
    • 1...Sd8
      • 2.Qe5#
    • 1...Sh8
      • 2.Qe5#
  • Tries
    • 1.Qf6?
      • threat
        • 2.Sc5#
      • 1...Se5
        • 2.Qxe5#
      • 1...Sf5!
    • 1.Qe1+?
      • 1...Kd4
        • 2.Qb4#
      • 1...Kf5!
  • Keys
    • 1.Qa5!
      • 1...Kd4
        • 2.Qb4#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Se5
        • 2.Qxe5#
      • 1...Sf5
        • 2.Qd5#
      • 1...Sc6
        • 2.Qd5#
      • 1...Sg6
        • 2.Qd5#
      • 1...Sc8
        • 2.Qd5#
      • 1...Sg8
        • 2.Qd5#
      • 1...Sg5
        • 2.Qe5#
      • 1...Sd6
        • 2.Qe5#
      • 1...Sh6
        • 2.Qe5#
      • 1...Sd8
        • 2.Qe5#
      • 1...Sh8
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • S(c);N_GUARD::QAR1(A),XS(c)
    • S(c);N_GUARD::QAR1(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • S(C)
      • Vars
        • S(c);N_GUARD::QAR1(A),XS(c)
      • Refutation
        • S(b);
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);P-FLIGHT::QAR2(A)
      • S(b);N_GUARD::QAB1(A),XS(b)
      • S(c);N_GUARD::QAR1(A),XS(c)
      • S(b);N_GUARD::QAB1(A)
      • S(c);N_GUARD::QAR1(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).