MESON Chess Problem Database

Problem Display
PID: 189960 (K2k4/N1pbp3/8/7B/2N5/8/2nQ4/8 w - - 0 1)

Semerad, Bohumil

Delnicke listy, 1913

K2k4/N1pbp3/8/7B/2N5/8/2nQ4/8

#2

5 + 5

5454 Near Snap 2019
6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Qa5#
    • 1...c6
      • 2.Qa5#
    • 1...e5
      • 2.Qg5#
    • 1...e6
      • 2.Qg5#
  • Tries
    • 1.Se5?
      • threat
        • 2.Sec6#
        • 2.Qxd7#
      • 1...c5
        • 2.Qa5#
        • 2.Qxd7#
      • 1...c6
        • 2.Qa5#
        • 2.Qxd7#
      • 1...Sb4
        • 2.Qxd7#
      • 1...Sd4!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Sb7#
      • 1...cxd6
        • 2.Qa5#
      • 1...exd6
        • 2.Qg5#
      • 1...c5
        • 2.Qa5#
      • 1...c6
        • 2.Qa5#
      • 1...e5
        • 2.Qg5#
      • 1...e6
        • 2.Qg5#

Anticipated by 154516(1900)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATEB::QAB(A)
    • P(d);OGATEB::QAB(A)
  • Tries
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAR1(A),XB(c)
      • Refutation
        • S(a);N_SPINB(c)
  • Actual
    • S(B);N_PINB(c)
    • Threat
      • S(B)
    • Vars
      • P(b);OGATEB,XS(B)::QAB(A)
      • P(d);OGATEB,XS(B)::QAB(A)
      • P(b);OGATEB::QAB(A)
      • P(d);OGATEB::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).