MESON Chess Problem Database

Problem Display
PID: 45203 (8/B2N2p1/2pR2P1/4N2Q/3nk3/1P3pP1/2p1b2K/b4B2 w - - 0 1)

Stevenson, Edward

Double Pin-Mate after a Black King Move, 1980

8/B2N2p1/2pR2P1/4N2Q/3nk3/1P3pP1/2p1b2K/b4B2

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sxb3
      • 2.Qg4#
    • 1...Sb5
      • 2.Qg4#
    • 1...Sf5
      • 2.Qg4#
  • Tries
    • 1.Rxd4+?
      • 1...Ke3
        • 2.Sg4#
      • 1...Bxd4!
    • 1.Qh4+?
      • 1...Kf5
        • 2.Bh3#
        • 2.Qf4#
        • 2.Qg4#
      • 1...Ke3!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Sc5#
      • 1...Kd3
        • 2.Qxf3#
      • 1...Bxc4
        • 2.Qe5#
      • 1...Sxb3
        • 2.Qg4#
      • 1...Se6
        • 2.Sd2#
      • 1...c5
        • 2.Sxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • S(e);XP(C)::QAR2(F)
    • S(e);::QAR2(F)
  • Tries
    • Try
      • R(G);CHECK,XS(e)
      • Vars
        • K(f);P-FLIGHT::S(E)
      • Refutation
        • B(a);XR(G)
    • Try
      • Q(F);CHECK
      • Refutation
        • K(f);P-FLIGHT,P_SPINS(e)
  • Actual
    • S(E);
    • Threat
      • S(J)
    • Vars
      • K(f);P_SPINB(c),P_SPINS(e),S_FLIGHT::QAR2(F),XP(d)
      • B(c);XS(E)::QAR1(F)
      • S(e);XP(C)::QAR2(F)
      • S(e);::S(E)
      • P(g);::S(J),XP(g)
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).