MESON Chess Problem Database

Problem Display
PID: 195752 (8/4p2K/p2pp3/Pp1NnR2/1P2k2P/1P2P2p/7P/5Q2 w - - 0 1)

Cauveren, Jonas Ephraim

Haagsche Post, 1921

8/4p2K/p2pp3/Pp1NnR2/1P2k2P/1P2P2p/7P/5Q2

#2

10 + 8

15601 Albrecht-Leiss-Degener Collection 2019
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd5
      • 2.Qh1#
      • 2.Qf3#
    • 1...Sd3
      • 2.Qf3#
    • 1...Sf3
      • 2.Qb1#
    • 1...Sc4
      • 2.Qb1#
    • 1...Sg4
      • 2.Qb1#
    • 1...Sc6
      • 2.Qb1#
    • 1...Sg6
      • 2.Qb1#
    • 1...Sd7
      • 2.Qb1#
    • 1...Sf7
      • 2.Qb1#
  • Tries
    • 1.Qb1+?
      • 1...Kxd5
        • 2.Qh1#
      • 1...Sd3!
    • 1.Qf4+?
      • 1...Kxd5
        • 2.Qf3#
      • 1...Kd3!
  • Keys
    • 1.Qe2!
      • 1...Kxd5
        • 2.Qf3#
      • 1...Kxf5
        • 2.e4#
      • 1...exd5
        • 2.Rf4#
      • 1...exf5
        • 2.Sc3#
      • 1...Sc4
        • 2.Qc2#
      • 1...Sd3
        • 2.Qf3#
      • 1...Sf3
        • 2.Qc2#
      • 1...Sg4
        • 2.Qc2#
      • 1...Sc6
        • 2.Qc2#
      • 1...Sg6
        • 2.Qc2#
      • 1...Sd7
        • 2.Qc2#
      • 1...Sf7
        • 2.Qc2#

Anticipated by 9464(1903)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 7
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(d);N_GUARD,SBLOCK::QAB1(A)
    • S(d);N_GUARD::QAB(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P_SPINS(d),S_FLIGHT,XS(H)::QAB(A)
      • Refutation
        • S(d);P_SPINS(d)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P_SPINS(d),S_FLIGHT,XS(H)::QAB(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);P_SPINS(d),S_FLIGHT,XS(H)::QAB(A)
      • K(b);OGATE,S_FLIGHT,XR(I)::P(D)
      • P(g);SBLOCK,XS(H)::R1(I)
      • P(g);SBLOCK,XR(I)::S(H)
      • S(d);N_GUARD::QAB(A)
      • S(d);N_GUARD,SBLOCK::QAB1(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).