MESON Chess Problem Database

Problem Display
PID: 64891 (b4R2/2n1p1n1/4P3/K1Q2qr1/1p1rNkpP/6p1/3P4/b3R1N1 w - - 0 1)

Letzen, Einar

Good Companions (February), 1922

b4R2/2n1p1n1/4P3/K1Q2qr1/1p1rNkpP/6p1/3P4/b3R1N1

#2

9 + 12

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Qf6
      • 2.Qxg5#
    • 1...Qf7
      • 2.Qxg5#
    • 1...Qxf8
      • 2.Qxg5#
    • 1...Rxe4
      • 2.Rf1#
    • 1...Bd5
      • 2.Qxc7#
  • Keys
    • 1.Sc3!
      • threat
        • 2.Qe5#
      • 1...Qxf8
        • 2.Qxg5#
      • 1...Qf6
        • 2.Qxg5#
      • 1...Qf7
        • 2.Qxg5#
      • 1...Re4
        • 2.Rf1#
      • 1...Rd5
        • 2.Re4#
      • 1...Be4
        • 2.Sce2#
      • 1...Bd5
        • 2.Qxc7#
      • 1...Sd5
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(g);::QAB1(G),XR(h)
    • Q(g);N_SPINQ(g),XR(I)::QAB1(G),XR(h)
    • R(d);SBLOCK,XS(D)::R(A)
    • B(l);N_PINQ(G)::QAB(G),XS(i)
  • Actual
    • S(D);
    • Threat
      • QAB1(G)
    • Vars
      • Q(g);N_SPINQ(g),XR(I)::QAB1(G),XR(h)
      • Q(g);::QAB1(G),XR(h)
      • R(d);S_CUTB(l)::R(A)
      • R(d);N_GUARD,S_CUTB(l)::R1(A)
      • B(l);SBLOCK::S(D)
      • B(l);N_PINQ(G)::QAB(G),XS(i)
      • S(i);N_PINQ(G)::QAR2(G),XR(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).