MESON Chess Problem Database

Problem Display
PID: 263779 (1Q6/B2prp2/8/K2b2N1/1p5p/7R/5R1p/b5kq w - - 0 1)

van Dijk, Johannes

Tijdschrift vd NSB, 1933

1Q6/B2prp2/8/K2b2N1/1p5p/7R/5R1p/b5kq

#2

6 + 10

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qf3
      • 2.Qxh2#
    • 1...Qe4
      • 2.Qxh2#
  • Tries
    • 1.Sf3+?
      • 1...Qxf3
        • 2.Qxh2#
      • 1...Bxf3!
    • 1.Rg3+?
      • 1...Bg2
        • 2.Sf3#
        • 2.Sh3#
      • 1...hxg3
        • 2.Sh3#
      • 1...Qg2!
  • Keys
    • 1.Rhf3!
      • threat
        • 2.Sh3#
      • 1...Qxf3
        • 2.Qxh2#
      • 1...Qg2
        • 2.Rf1#
      • 1...Be6
        • 2.Rb2#
      • 1...h3
        • 2.Sxh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(c);N_GUARD::QAB1(F),XP(d)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • Q(c);XS(D)::QAB1(F),XP(d)
      • Refutation
        • B(g);XS(D)
    • Try
      • R(B);CHECK
      • Vars
        • P(f);XR(B)::S(D)
      • Refutation
        • Q(c);P_SPINQ(c)
  • Actual
    • R(B);
    • Threat
      • S(D)
    • Vars
      • Q(c);N_GUARD,XR(B)::QAB1(F),XP(d)
      • Q(c);SBLOCK::B(E)+R(A),DCHECK
      • B(g);S_CUTR(i)::B(E)+R(A)
      • P(f);::S(D),XP(f)
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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).