MESON Chess Problem Database

Problem Display
PID: 57337 (3qQB2/1nbP1p2/1N3kp1/3PN3/4p1KP/8/b7/8 w - - 0 1)

Coppens, JP

7th Comm., Brisbane Courier, 1919

3qQB2/1nbP1p2/1N3kp1/3PN3/4p1KP/8/b7/8

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qe7
      • 2.Qxe7#
    • 1...Qxd7+
      • 2.Sexd7#
      • 2.Sbxd7#
    • 1...Qa8
      • 2.Qe7#
    • 1...Qb8
      • 2.Qe7#
    • 1...Qc8
      • 2.Qe7#
    • 1...Bxd5
      • 2.Sxd5#
    • 1...g5
      • 2.hxg5#
  • Keys
    • 1.Kf4!
      • threat
        • 2.Qxf7#
      • 1...Bxe5+
        • 2.Qxe5#
      • 1...g5+
        • 2.hxg5#
      • 1...Qxd7
        • 2.Sxd7#
      • 1...Qxe8
        • 2.dxe8S#
      • 1...Bxd5
        • 2.Sxd5#
      • 1...Qe7
        • 2.Qxe7#
      • 1...Sd6
        • 2.Sg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • Q(h);N_GUARD::QAB1(G),XQ(h)
    • Q(h);N_GUARD::QAB1(G)
    • Q(h);N_GUARD,P_PINP(F)::QAB1(G)
    • B(a);XP(C)::S(E),XB(a)
    • P(d);OGATE::P(B),XP(d)
  • Actual
    • K(A);P-FLIGHT,P_SPINS(D)
    • Threat
      • QAR1(G),XP(g)
    • Vars
      • B(f);CHECK,OGATE,XS(D)::QAB1(G),XB(f)
      • P(d);CHECK,OGATE::P(B),XP(d)
      • Q(h);XP(F)::S(E),XQ(h)
      • Q(h);OGATE,XQ(G)::PXQ(h)=S
      • B(a);XP(C)::S(E),XB(a)
      • Q(h);N_GUARD::QAB1(G),XQ(h)
      • S(e);N_PINS(D)::S(D)
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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).