MESON Chess Problem Database

Problem Display
PID: 45454 (4R2K/2B1N3/3r2B1/Q3P3/2PnNkpR/7P/3P4/8 w - - 0 1)

Stevenson, Edward

Double Pin-Mate after a Black King Move, 1980

4R2K/2B1N3/3r2B1/Q3P3/2PnNkpR/7P/3P4/8

#2

12 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Sf3
      • 2.Rxg4#
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qg3#
      • 1...Kxe5
        • 2.Sd5#
      • 1...Rxg6
        • 2.Qe3#
      • 1...Se2
        • 2.Rxg4#
      • 1...Sf3
        • 2.Rxg4#
      • 1...Sf5
        • 2.Rxg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(a);SBLOCK::R1(E),XP(c)
  • Actual
    • Q(F);
    • Threat
      • QAB1(F)
    • Vars
      • K(b);N_SPINP(c),P_SPINR(d),P_SPINS(a),S_FLIGHT,XP(G)::R(K)+S(J)
      • R(d);XB(H)::QAB1(F)
      • S(a);::R1(E),XP(c)
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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).