MESON Chess Problem Database

Problem Display
PID: 10276 (8/3K3N/8/5R1p/1p4kr/5pr1/Q1B3pn/4N1n1 w - - 0 1)

Overkamp, Petrus

Magyar Sakkelet, 1963

8/3K3N/8/5R1p/1p4kr/5pr1/Q1B3pn/4N1n1

#2

6 + 9

273 Mat Plus 1994

SOLUTION

  • SOUND
  • Sets
    • 1...Rgh3
      • 2.Qg8#
    • 1...Rhh3
      • 2.Qc4#
    • 1...Sh3
      • 2.Sf6#
  • Tries
    • 1.Qe6?
      • threat
        • 2.Rxf3#
        • 2.Rf6#
        • 2.Rf7#
        • 2.Rf8#
      • 1...Rgh3
        • 2.Rxf3#
        • 2.Qg8#
        • 2.Qg6#
      • 1...Rhh3
        • 2.Qc4#
        • 2.Qe4#
      • 1...f2
        • 2.Rxf2#
        • 2.Rf3#
        • 2.Rf6#
        • 2.Rf7#
        • 2.Rf8#
      • 1...Kh3!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Sf2#
      • 1...Kh3
        • 2.Sf2#
      • 1...Kxf5
        • 2.Qe6#
      • 1...Rgh3
        • 2.Rg5#
      • 1...Rhh3
        • 2.Rf4#
      • 1...Sh3
        • 2.Se5#
      • 1...f2
        • 2.Sxf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(e);SBLOCK::QAR(B)
    • R(h);SBLOCK::QAR(B)
    • S(a);SBLOCK::S(F)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(4)
      • Refutation
        • K(g);S_FLIGHT
  • Actual
    • S(A);
    • Threat
      • S(A)
    • Vars
      • K(g);S_FLIGHT::S(A)
      • K(g);OGATEB,S_FLIGHT,XR(D)::QAB1(B)
      • R(e);SBLOCK::R1(D)
      • R(h);SBLOCK::R1(D)
      • S(a);SBLOCK::S(A)
      • P(d);::S(A),XP(d)
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).