MESON Chess Problem Database

Problem Display
PID: 226569 (8/7p/7p/1P2p2k/4BP1p/2p2K2/7Q/3n4 w - - 0 1)

Sundman, Gote

Tidskrift for Schack, 1978

8/7p/7p/1P2p2k/4BP1p/2p2K2/7Q/3n4

#2

5 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...h3
      • 2.Qxh3#
  • Tries
    • 1.Qa2?
      • threat
        • 2.Qf7#
      • 1...exf4
        • 2.Qd5#
      • 1...h3!
    • 1.Qh3?
      • threat
        • 2.Qg4#
        • 2.Qf5#
      • 1...Sf2
        • 2.Qf5#
      • 1...Se3!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Kg2#
      • 1...exf4
        • 2.Kxf4#
      • 1...h3
        • 2.Kg3#
      • 1...Sf2
        • 2.Kxf2#
      • 1...Se3
        • 2.Kxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATEB::QAR2(A),XP(c)
  • Tries
    • Try
      • Q(A);N_PINP(c)
      • Threat
        • QAB(A)
      • Vars
        • P(d);OGATEB,XP(D)::QAR(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAR2(A)
      • Refutation
        • S(a);
  • Actual
    • Q(A);N_PINP(c)
    • Threat
      • QAB(A)+K(B)
    • Vars
      • P(d);XP(D)::QAB(A)+K(B),XP(d)
      • P(c);::QAB(A)+K(B)
      • S(a);::QAB(A)+K(B),XS(a)
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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).