MESON Chess Problem Database

Problem Display
PID: 21117 (8/1K4Q1/8/1p1p4/1p6/k7/1R1q4/2N5 w - - 0 1)

Orlimont, PA (= Ernst Krieger)

Tagliche Rundschau, 1916

8/1K4Q1/8/1p1p4/1p6/k7/1R1q4/2N5

#2

4 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.Ra2#
    • 1...Qc3
      • 2.Ra2#
    • 1...Qe3
      • 2.Ra2#
    • 1...Qf4
      • 2.Ra2#
    • 1...Qg5
      • 2.Ra2#
    • 1...Qh6
      • 2.Ra2#
    • 1...Qd1
      • 2.Ra2#
    • 1...Qd3
      • 2.Ra2#
    • 1...Qd4
      • 2.Ra2#
  • Tries
    • 1.Rxd2?
      • threat
        • 2.Ra2#
        • 2.Qa1#
      • 1...Ka4
        • 2.Ra2#
        • 2.Qa1#
      • 1...d4
        • 2.Ra2#
      • 1...b3!
  • Keys
    • 1.Qd4!
      • 1...Ka4
        • 2.Qa7#
      • 1...Qxc1
        • 2.Qxb4#
      • 1...Qxb2
        • 2.Qa7#
      • 1...Qxd4
        • 2.Ra2#
      • 1...Qc3
        • 2.Ra2#
      • 1...Qe1
        • 2.Ra2#
      • 1...Qe3
        • 2.Ra2#
        • 2.Qxb4#
      • 1...Qf4
        • 2.Ra2#
      • 1...Qg5
        • 2.Ra2#
        • 2.Qxb4#
      • 1...Qh6
        • 2.Ra2#
        • 2.Qxb4#
      • 1...Qd1
        • 2.Ra2#
        • 2.Qxb4#
      • 1...Qc2
        • 2.Qxb4#
      • 1...Qe2
        • 2.Qxb4#
      • 1...Qf2
        • 2.Qxb4#
      • 1...Qg2
        • 2.Qxb4#
      • 1...Qh2
        • 2.Qxb4#
      • 1...Qd3
        • 2.Ra2#
        • 2.Qxb4#
      • 1...b3
        • 2.Rxb3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 5
  • Sets
    • Q(a);N_GUARD::R1(B)
  • Tries
    • Try
      • R(B);XQ(a)
      • Threat
        • DUALS(2)
      • Vars
        • P(e);::R1(B)
      • Refutation
        • P(c);
  • Actual
    • Q(D);
    • Vars
      • K(b);P-FLIGHT,P_SPINP(c)::QAR(D)
      • Q(a);N_GUARD,XS(A)::QAB1(D),XP(c)
      • Q(a);SBLOCK,XR(B)::QAR(D)
      • Q(a);N_GUARD,XQ(D)::R1(B)
      • Q(a);N_GUARD::R1(B)
      • Q(a);N_GUARD::QAB1(D),XP(c)
      • P(c);::R1(B),XP(c)
HTML5 logo

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).