MESON Chess Problem Database

Problem Display
PID: 234908 (4k1K1/4pN2/6N1/b4r1B/1n1Q4/8/8/8 w - - 0 1)

Haring, Jacobus

Hlas l'udu, 1973

4k1K1/4pN2/6N1/b4r1B/1n1Q4/8/8/8

#2

5 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bd8
      • 2.Qxd8#
    • 1...Sd5
      • 2.Qa4#
  • Tries
    • 1.Sf8?
      • threat
        • 2.Qd7#
      • 1...Rg5+
        • 2.Sxg5#
      • 1...Sd5
        • 2.Qa4#
      • 1...Rd5!
    • 1.Sfe5?
      • threat
        • 2.Qd7#
      • 1...Rf8+
        • 2.Sxf8#
      • 1...Rxe5
        • 2.Sxe5#
      • 1...Sd5!
  • Keys
    • 1.Sge5!
      • threat
        • 2.Qd7#
      • 1...Rg5+
        • 2.Sxg5#
      • 1...Rxe5
        • 2.Sxe5#
        • 2.Sg5#
      • 1...Sd5
        • 2.Qa4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • B(b);N_GUARD::QAR1(A),XB(b)
    • S(a);OGATE::QAB(A)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAB1(A)
      • Vars
        • R(c);CHECK,N_GUARD::B(B)+S(D),XR(c)
        • S(a);OGATE::QAB(A)
      • Refutation
        • R(c);
    • Try
      • S(D);
      • Threat
        • QAB1(A)
      • Vars
        • R(c);CHECK,N_GUARD::B(B)+S(C),XR(c)
        • R(c);XS(D)::B(B)+S(C),XR(c)
      • Refutation
        • S(a);
  • Actual
    • S(C);
    • Threat
      • QAB1(A)
    • Vars
      • R(c);CHECK,N_GUARD::B(B)+S(D),XR(c)
      • S(a);OGATE::QAB(A)
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).