MESON Chess Problem Database

Problem Display
PID: 239651 (4QK2/8/8/pp1pP2R/N2k3P/3P4/1npP4/n1b2B2 w - - 0 1)

Maleika, Gerhard

3rd HM., Zaldo MT (Problemas), 2019

4QK2/8/8/pp1pP2R/N2k3P/3P4/1npP4/n1b2B2

#2

9 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qf7?
      • threat
        • 2.Qf2#
        • 2.Qf4#
        • 2.Qa7#
      • 1...Bxd2
        • 2.Qa7#
      • 1...Sxa4
        • 2.Qf2#
      • 1...bxa4
        • 2.Qf2#
        • 2.Qa7#
      • 1...Sb3
        • 2.Qf2#
        • 2.Qf4#
      • 1...Sd1
        • 2.Qf4#
        • 2.Qa7#
      • 1...Sc4
        • 2.Qf4#
      • 1...Sxd3!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qg1#
        • 2.Qg4#
        • 2.Qb6#
      • 1...Bxd2
        • 2.Qb6#
      • 1...Sxd3
        • 2.Qxd3#
      • 1...Sxa4
        • 2.Qg1#
      • 1...bxa4
        • 2.Qg1#
        • 2.Qb6#
      • 1...Sb3
        • 2.Qg1#
        • 2.Qg4#
      • 1...Sd1
        • 2.Qg4#
        • 2.Qb6#
      • 1...Sc4
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(H);
      • Threat
        • DUALS(3)
      • Vars
        • B(b);XP(B)::QAB(H)
        • S(c);XS(D)::QAB(H)
        • S(c);::QAR2(H)
      • Refutation
        • S(c);XP(C)
  • Actual
    • Q(H);
    • Threat
      • DUALS(3)
    • Vars
      • B(b);XP(B)::QAB(H)
      • S(c);OGATE,XP(C)::QAR1(H),XS(c)
      • S(c);XS(D)::QAB(H)
      • S(c);::QAR(H)
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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).