MESON Chess Problem Database

Problem Display
PID: 249358 (8/K7/7Q/2R3pB/2R1P2B/1Np1k3/2p1n2p/2Nb2br w - - 0 1)

Haring, Jacobus

Jerusalem Post, 1954

8/K7/7Q/2R3pB/2R1P2B/1Np1k3/2p1n2p/2Nb2br

#2

9 + 9

3976 FIDE Album (1956-1958) 1961
15601 Albrecht-Leiss-Degener Collection 2021
3713 Snap 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Qxg5#
  • Tries
    • 1.Bxe2?
      • threat
        • 2.Qxg5#
      • 1...Kf4
        • 2.Qxg5#
      • 1...Bxe2!
  • Keys
    • 1.Rxg5!
      • 1...Kf4+
        • 2.Rgc5#
      • 1...Sxc1
        • 2.Rd5#
      • 1...Sg3
        • 2.Rf5#
      • 1...Sd4
        • 2.Re5#
      • 1...Bf2
        • 2.Rg3#
      • 1...Sf4
        • 2.Qb6#

This anticipates 271516(1956)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(h);P_PINR(F),S_FLIGHT::QAB1(H),XP(i)
  • Tries
    • Try
      • B(G);XS(e)
      • Threat
        • QAB(H),XP(i)
      • Vars
        • K(h);P_PINR(F),S_FLIGHT::QAB1(H),XP(i)
      • Refutation
        • B(a);XB(G)
  • Actual
    • R(F);XP(i)
    • Vars
      • K(h);CHECK,S_FLIGHT::QAB(H)+R(F)
      • S(e);N_GUARD,XS(A)::QAB(H)+R(F)
      • S(e);N_GUARD::QAB(H)+R(F)
      • B(b);SBLOCK::QAB(H)+R(F),DCHECK
      • S(e);N_GUARD,SBLOCK::QAB(H)
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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).