MESON Chess Problem Database

Problem Display
PID: 264058 (8/4p3/4Q2B/K2p2r1/pR1n1k1p/7P/3pPbnP/4q1r1 w - - 0 1)

van Dijk, Johannes

Tijdschrift vd KNSB, 1939

8/4p3/4Q2B/K2p2r1/pR1n1k1p/7P/3pPbnP/4q1r1

#2

7 + 12

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bg3
      • 2.Rxd4#
    • 1...Se3
      • 2.Rxd4#
  • Tries
    • 1.Qf5+?
      • 1...Ke3
        • 2.Qe5#
      • 1...Kxf5!
  • Keys
    • 1.Qxd5!
      • threat
        • 2.Bxg5#
      • 1...Ke3
        • 2.Qe5#
      • 1...e5
        • 2.Qf3#
      • 1...Se3
        • 2.Rxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(d);N_GUARD::R(D),XS(g)
    • S(e);S_CUTB(d)::R(D),XS(g)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • K(h);N_GUARD,N_SPINS(g),S_FLIGHT::QAR2(F)
      • Refutation
        • K(h);N_SPINR(k),N_SPINS(g),P-FLIGHT,XQ(F)
  • Actual
    • Q(F);P_SPINQ(F),XP(j)
    • Threat
      • B(G),XR(k)
    • Vars
      • K(h);N_GUARD,N_SPINS(g),S_FLIGHT::QAR2(F)
      • P(l);N_PINQ(F),SBLOCK::QAR1(F)
      • S(e);SBLOCK,S_CUTB(d)::R(D),XS(g)
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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).