MESON Chess Problem Database

Problem Display
PID: 185158 (1B2K3/5Q2/Bp6/1N1P1RP1/4k1NR/p1p2p1p/P1pqpp1P/1nrbbrn1 w - - 0 1)

Bjorklund, Stip Leopold

Springaren, 1948

1B2K3/5Q2/Bp6/1N1P1RP1/4k1NR/p1p2p1p/P1pqpp1P/1nrbbrn1

#2

12 + 16

15601 Albrecht-Leiss-Degener Collection 2018
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qe3
      • 2.Sxf2#
    • 1...Qd3
      • 2.Rf4#
      • 2.Re5#
      • 2.Qe6#
    • 1...Qd4
      • 2.Sd6#
    • 1...Qxd5
      • 2.Qxd5#
  • Tries
    • 1.Rf4+?
      • 1...Kd3
        • 2.Rd4#
        • 2.Qg6#
        • 2.Qf5#
        • 2.Qh7#
      • 1...Qxf4!
    • 1.Qh7?
      • 1...Kd3
        • 2.Rf4#
      • 1...Qxg5
        • 2.Rxg5#
      • 1...Qxd5
        • 2.Rf4#
      • 1...Qf4
        • 2.Re5#
      • 1...Qe3
        • 2.Sxf2#
      • 1...Qd4
        • 2.Sd6#
      • 1...Qd3!
  • Keys
    • 1.Qg6!
      • 1...Kd3
        • 2.Rf4#
      • 1...Qxg5
        • 2.Rxg5#
      • 1...Qxd5
        • 2.Rf4#
      • 1...Qe3
        • 2.Sxf2#
      • 1...Qf4
        • 2.Re5#
      • 1...Qd3
        • 2.Qe6#
      • 1...Qd4
        • 2.Sd6#

Anticipated by 9596(1906), 115057(1906), 75596(1947)

This anticipates 64905(1983)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(h);SBLOCK::R(D)+S(C),DCHECK,XP(j)
    • Q(h);SBLOCK::S(E)
    • Q(h);OGATE,XP(F)::QAB1(J),XQ(h)
  • Tries
    • Try
      • R(G);CHECK
      • Refutation
        • Q(h);XR(G)
    • Try
      • Q(J);
      • Vars
        • K(o);S_FLIGHT::QAB(J)+R(G)
        • Q(h);OGATE,XP(H)::QAB(J)+R(G),XQ(h)
        • Q(h);SBLOCK,XP(F)::QAB(J)+R(G),DCHECK
        • Q(h);SBLOCK::QAB(J)+R(G),DCHECK
        • Q(h);SBLOCK::R(D)+S(C),DCHECK,XP(j)
        • Q(h);SBLOCK::S(E)
      • Refutation
        • Q(h);
  • Actual
    • Q(J);
    • Vars
      • K(o);S_FLIGHT::QAB(J)+R(G)
      • Q(h);OGATE,XP(H)::QAB(J)+R(G),XQ(h)
      • Q(h);SBLOCK,XP(F)::QAB(J)+R(G),DCHECK
      • Q(h);SBLOCK::R(D)+S(C),DCHECK,XP(j)
      • Q(h);SBLOCK::QAB(J)+R(G),DCHECK
      • Q(h);SBLOCK::QAR2(J)
      • Q(h);SBLOCK::S(E)
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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).