MESON Chess Problem Database

Problem Display
PID: 45376 (n2r1B2/1p2p2b/3kPb1R/p4n2/5P2/2R1N2B/2prpNQK/8 w - - 0 1)

Stevenson, Edward

Double Pin-Mate after a Black King Move, 1980

n2r1B2/1p2p2b/3kPb1R/p4n2/5P2/2R1N2B/2prpNQK/8

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Qxd5#
    • 1...Bd4
      • 2.Se4#
      • 2.Qd5#
    • 1...Bh4
      • 2.Se4#
    • 1...Be5
      • 2.Se4#
    • 1...Bg5
      • 2.Se4#
    • 1...Bg7
      • 2.Se4#
    • 1...Bh8
      • 2.Se4#
    • 1...Sd4
      • 2.Qd5#
    • 1...b5
      • 2.Rc6#
      • 2.Qc6#
    • 1...b6
      • 2.Rc6#
      • 2.Qc6#
  • Keys
    • 1.Qxb7!
      • threat
        • 2.Rc6#
        • 2.Qc6#
      • 1...Kxe6
        • 2.Qxe7#
      • 1...Bxc3
        • 2.Se4#
      • 1...Sxe3
        • 2.Qc6#
      • 1...c1Q
        • 2.Qc6#
      • 1...c1R
        • 2.Qc6#
      • 1...Rc8
        • 2.Qd7#
      • 1...Sd4
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 6
  • Sets
    • R(b);N_GUARD::QAR1(B),XR(b)
    • B(g);::S(A)
    • B(g);P_PINP(G)::S(A)
    • S(e);S_CUTR(b)::QAR1(B)
  • Actual
    • Q(B);XP(h)
    • Threat
      • DUALS(2)
    • Vars
      • K(f);N_SPINP(i),P-FLIGHT,P_SPINB(g),P_SPINS(e),XP(H)::QAR1(B),XP(i)
      • B(g);XR(D)::S(A)
      • S(e);XS(E)::QAR1(B)
      • P(a);::QAR1(B)
      • R(l);N_GUARD::QAR1(B)
      • S(e);S_CUTR(b)::QAR1(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).