MESON Chess Problem Database

Problem Display
PID: 231496 (8/3K4/3n4/3k4/3P4/2PQ4/8/8 w - - 0 1)

Torngren, Pehr Hendrik

Aftonbladet, 1927

8/3K4/3n4/3k4/3P4/2PQ4/8/8

#2

4 + 2

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sc4
      • 2.Qf3#
    • 1...Se4
      • 2.c4#
    • 1...Sb5
      • 2.c4#
    • 1...Sf5
      • 2.c4#
    • 1...Sb7
      • 2.c4#
    • 1...Sf7
      • 2.c4#
    • 1...Sc8
      • 2.c4#
    • 1...Se8
      • 2.c4#
  • Tries
    • 1.Qf3+?
      • 1...Se4
        • 2.Qf7#
      • 1...Kc4!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qe6#
      • 1...Se4
        • 2.Qa2#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 7
  • Sets
    • S(b);N_GUARD,SBLOCK::QAB(B)
    • S(b);N_GUARD::P(A)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b),SBLOCK::QAB(B)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • S(b);N_GUARD,SBLOCK::QAB(B)
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).