MESON Chess Problem Database

Problem Display
PID: 238099 (3Q4/8/N7/2pPP3/P1k5/8/1bK3B1/8 w - - 0 1)

Hermanson, Halvar

Norsk Sjakkblad, 1957

3Q4/8/N7/2pPP3/P1k5/8/1bK3B1/8

#2

7 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ba3
      • 2.Qh4#
    • 1...Bd4
      • 2.Bf1#
  • Tries
    • 1.Qa5?
      • threat
        • 2.Qxc5#
      • 1...Ba3
        • 2.Qc3#
      • 1...Bd4
        • 2.Qb5#
      • 1...Kd4!
  • Keys
    • 1.Qf8!
      • threat
        • 2.Qxc5#
      • 1...Kd4
        • 2.Qf4#
      • 1...Bd4
        • 2.Qf1#
      • 1...Ba3
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::QAR(G)
    • B(a);SBLOCK::B(B)
  • Tries
    • Try
      • Q(G);
      • Threat
        • QAR1(G),XP(c)
      • Vars
        • B(a);N_GUARD::QAR1(G)
        • B(a);SBLOCK::QAB1(G)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(G);
    • Threat
      • QAR1(G),XP(c)
    • Vars
      • K(b);P-FLIGHT::QAR2(G)
      • B(a);SBLOCK::QAB(G)
      • B(a);N_GUARD::QAR(G)
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).