MESON Chess Problem Database

Problem Display
PID: 61829 (1n5B/1RKR4/p7/p1kpN1p1/2pp1p1p/6qr/b3PN2/2Q1b3 w - - 0 1)

Hjelle, David

Het Belgisch Schaakbord (L'Echiquier Belge), 1956

1n5B/1RKR4/p7/p1kpN1p1/2pp1p1p/6qr/b3PN2/2Q1b3

#2

8 + 14

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd7
      • 2.Sxd7#
    • 1...c3
      • 2.Qa3#
    • 1...f3
      • 2.Sd3#
  • Tries
    • 1.Qxc4+?
      • 1...dxc4
        • 2.Se4#
      • 1...Bxc4!
  • Keys
    • 1.e4!
      • threat
        • 2.Rxd5#
      • 1...Sxd7
        • 2.Sxd7#
      • 1...dxe4
        • 2.Sxe4#
      • 1...dxe4 ep
        • 2.Sed3#
      • 1...fxe4 ep
        • 2.Sd3#
      • 1...c3
        • 2.Qa3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(n);XR(G)::S(D),XS(n)
    • P(e);S_CUTB(a),S_CUTQ(c)::QAB(A)
    • P(g);P_PINS(D),S_CUTQ(c)::S(C)
  • Tries
    • Try
      • Q(A);CHECK,XP(e)
      • Vars
        • P(k);XQ(A)::S(C)
      • Refutation
        • B(b);XQ(A)
  • Actual
    • P(B);
    • Threat
      • R1(G),XP(k)
    • Vars
      • S(n);XR(G)::S(D),XS(n)
      • P(k);XP(B)::S(C),XP(k)
      • P(f);EP,S_CUTQ(c),XP(B)::S(D)
      • P(g);EP,P_PINS(D),S_CUTQ(c),XP(B)::S(C)
      • P(e);S_CUTB(a),S_CUTQ(c)::QAB(A)
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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).