MESON Chess Problem Database

Problem Display
PID: 214904 (n4Q2/B4B2/1r5N/pP2p3/4k1p1/P3p3/1P2K3/8 w - - 0 1)

Krieckhaus, L

St. Louis Globe Democrat, 1878

n4Q2/B4B2/1r5N/pP2p3/4k1p1/P3p3/1P2K3/8

#2

8 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...a4
      • 2.Qb4#
  • Tries
    • 1.Qc5?
      • threat
        • 2.Qxe3#
        • 2.Qc4#
      • 1...Kf4
        • 2.Qxe3#
      • 1...Rc6
        • 2.Qxe3#
      • 1...Rd6
        • 2.Qxe3#
      • 1...Re6
        • 2.Qc4#
      • 1...Rxh6!
  • Keys
    • 1.Qc8!
      • threat
        • 2.Qxg4#
        • 2.Qc4#
      • 1...Kd4
        • 2.Qc4#
      • 1...Kf4
        • 2.Qxg4#
      • 1...Rxh6
        • 2.Qxg4#
      • 1...Rc6
        • 2.Qxg4#
        • 2.Qf5#
      • 1...Rd6
        • 2.Qxg4#
        • 2.Qf5#
      • 1...Re6
        • 2.Qc4#
      • 1...Rf6
        • 2.Qc4#
      • 1...Rg6
        • 2.Qf5#
        • 2.Qc4#
      • 1...Sc7
        • 2.Qxg4#
      • 1...g3
        • 2.Qg4#
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • P(d);N_GUARD::QAR(H)
  • Tries
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);P-FLIGHT::QAB1(H),XP(a)
        • R(f);::QAR1(H),XP(a)
        • R(f);::QAR2(H)
      • Refutation
        • R(f);XS(E)
  • Actual
    • Q(H);
    • Threat
      • DUALS(2)
    • Vars
      • K(b);P-FLIGHT,P_SPINR(f)::QAR1(H)
      • K(b);P-FLIGHT::QAR1(H),XP(c)
      • R(f);XS(E)::QAR2(H),XP(c)
      • R(f);::QAR2(H)
      • S(g);::QAR2(H),XP(c)
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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).