MESON Chess Problem Database

Problem Display
PID: 201606 (8/4p3/2P3p1/1KP1kpP1/R4R1P/1Q6/6n1/8 w - - 0 1)

Markus, Gustav

Osterreichische Schachrundschau, 1922

8/4p3/2P3p1/1KP1kpP1/R4R1P/1Q6/6n1/8

#2

8 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Rad4?
      • threat
        • 2.Qd5#
      • 1...Sxf4
        • 2.Qe3#
      • 1...Se3
        • 2.Qxe3#
      • 1...e6!
    • 1.Rfd4?
      • threat
        • 2.Qd5#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sf4
        • 2.Qe3#
      • 1...e6!
    • 1.Qe3+?
      • 1...Kd5
        • 2.Rad4#
        • 2.Rfd4#
      • 1...Sxe3!
  • Keys
    • 1.Kc4!
      • 1...Se3+
        • 2.Qxe3#
      • 1...Kxf4
        • 2.Kd5#
      • 1...Ke6
        • 2.Kd4#
      • 1...Sxf4
        • 2.Qe3#
      • 1...Sxh4
        • 2.Qe3#
      • 1...Se1
        • 2.Qe3#
      • 1...e6
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);
      • Threat
        • QAR1(A)
      • Vars
        • S(a);N_GUARD,XR(C)::QAR2(A)
        • S(a);N_GUARD::QAR2(A),XS(a)
      • Refutation
        • P(e);
    • Try
      • R(C);
      • Threat
        • QAR1(A)
      • Vars
        • S(a);N_GUARD::QAR2(A),XS(a)
        • S(a);N_GUARD::QAR2(A)
      • Refutation
        • P(e);
    • Try
      • Q(A);CHECK
      • Refutation
        • S(a);XQ(A)
  • Actual
    • K(E);S_FLIGHT
    • Vars
      • S(a);CHECK,N_GUARD::QAR2(A),XS(a)
      • K(b);S_FLIGHT,XR(C)::R(B)+K(E)
      • K(b);P-FLIGHT::QAB(A)+K(E)
      • S(a);N_GUARD,XR(C)::QAR2(A)
      • S(a);N_GUARD,XP(D)::QAR2(A)
      • S(a);N_GUARD::QAR2(A)
      • P(e);SBLOCK::QAB(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).