MESON Chess Problem Database

Problem Display
PID: 189506 (8/8/RQ1n4/8/5K1k/8/8/3n4 w - - 0 1)

Ensel, Erich

Pravo lidu, 1911

8/8/RQ1n4/8/5K1k/8/8/3n4

#2

3 + 3

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sc4
      • 2.Qh6#
    • 1...Se4
      • 2.Qh6#
    • 1...Sb5
      • 2.Qh6#
    • 1...Sb7
      • 2.Qh6#
    • 1...Sc8
      • 2.Qh6#
    • 1...Se8
      • 2.Qh6#
  • Tries
    • 1.Qg1?
      • threat
        • 2.Qh2#
        • 2.Qh1#
        • 2.Qg4#
      • 1...Kh3
        • 2.Qh1#
        • 2.Qg3#
      • 1...Kh5
        • 2.Qg5#
      • 1...Se3
        • 2.Qh2#
        • 2.Qh1#
      • 1...Sf2!
    • 1.Qd8+?
      • 1...Kh5
        • 2.Qg5#
      • 1...Kh3!
    • 1.Qxd6?
      • threat
        • 2.Qh6#
      • 1...Kh5
        • 2.Qh6#
      • 1...Kh3!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Qh1#
        • 2.Qh7#
      • 1...Kh3
        • 2.Qh1#
      • 1...Kh5
        • 2.Qh7#
      • 1...Sxb7
        • 2.Rh6#
      • 1...Sf5
        • 2.Qh1#
      • 1...Sf2
        • 2.Qh7#
      • 1...Se4
        • 2.Rh6#
        • 2.Qh7#
      • 1...Sf7
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 5
  • Sets
    • S(c);OGATE::QAR2(C)
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(3)
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • S(a);
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(C);XS(c)
      • Threat
        • QAR2(C)
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(C);
    • Threat
      • DUALS(2)
    • Vars
      • K(b);P-FLIGHT::QAR2(C)
      • S(c);OGATE,XQ(C)::R(B)
      • S(c);::QAR(C)
      • S(a);::QAR(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).