MESON Chess Problem Database

Problem Display
PID: 10905 (4k2r/1K2Np1r/5Q2/8/8/8/8/8 w k - 0 1)

Paalanen, Erkki

Stella Polaris, 1969

4k2r/1K2Np1r/5Q2/8/8/8/8/8

#2

3 + 4

2838 Fun with Chess Miniatures 1996
15652 Tehtavaniekka 2012

SOLUTION

  • SOUND
  • Tries
    • 1.Sd5?
      • threat
        • 2.Qe7#
      • 1...Kd7
        • 2.Qe7#
      • 1...0-0
        • 2.Se7#
      • 1...Kf8!
    • 1.Sc6?
      • threat
        • 2.Qe7#
        • 2.Qd8#
      • 1...Kd7
        • 2.Qe7#
      • 1...0-0
        • 2.Se7#
      • 1...Kf8!
    • 1.Sg6?
      • threat
        • 2.Qe7#
      • 1...Kd7
        • 2.Qe7#
      • 1...fxg6+!
    • 1.Sc8?
      • threat
        • 2.Qe7#
      • 1...Kd7
        • 2.Qe7#
      • 1...0-0
        • 2.Se7#
      • 1...Kf8!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Qe7#
      • 1...Kd7
        • 2.Qe7#
      • 1...Kf8
        • 2.Qd8#
      • 1...0-0
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Threat
        • QAR1(A)
      • Vars
        • K(c);S_FLIGHT::QAR1(A)
        • K(c);0-0::S(C)
      • Refutation
        • K(c);P-FLIGHT,P_SPINP(a)
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);S_FLIGHT::QAR1(A)
        • K(c);0-0::S(C)
      • Refutation
        • K(c);P-FLIGHT,P_SPINP(a)
    • Try
      • S(C);
      • Threat
        • QAR1(A)
      • Vars
        • K(c);S_FLIGHT::QAR1(A)
      • Refutation
        • P(a);CHECK,XS(C)
    • Try
      • S(C);
      • Threat
        • QAR1(A)
      • Vars
        • K(c);S_FLIGHT::QAR1(A)
        • K(c);0-0::S(C)
      • Refutation
        • K(c);P-FLIGHT,P_SPINP(a)
  • Actual
    • S(C);
    • Threat
      • QAR1(A)
    • Vars
      • K(c);S_FLIGHT::QAR1(A)
      • K(c);P-FLIGHT,P_SPINP(a)::QAR2(A)
      • K(c);0-0::S(C)
HTML5 logo

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).