MESON Chess Problem Database

Problem Display
PID: 45188 (4R3/1p1N3B/2p5/1pP1Nn2/1p1kPn1R/3prr2/3P1B2/K2Q3b w - - 0 1)

Stevenson, Edward

Double Pin-Mate after a Black King Move, 1980

4R3/1p1N3B/2p5/1pP1Nn2/1p1kPn1R/3prr2/3P1B2/K2Q3b

#2

11 + 11

SOLUTION

  • SOUND
  • Keys
    • 1.Qb3!
      • threat
        • 2.Qxb4#
      • 1...Kxe4
        • 2.Sxc6#
      • 1...Sd5
        • 2.Qxd3#
      • 1...Sd6
        • 2.Qb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Actual
    • Q(B);
    • Threat
      • QAR2(B),XP(e)
    • Vars
      • K(f);N_SPINR(c),P-FLIGHT,P_SPINS(g),XP(E)::R(K)+S(H),XP(j)
      • S(g);N_GUARD::QAR1(B),XP(b)
      • S(i);::QAB(B)
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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).