MESON Chess Problem Database

Problem Display
PID: 229089 (4RnnB/Q1K5/p3pr2/1pNN3R/3kP3/1P1p2p1/3p4/6b1 w - - 0 1)

van Dijk, Johannes

Der Tijd, 1926

4RnnB/Q1K5/p3pr2/1pNN3R/3kP3/1P1p2p1/3p4/6b1

#2

9 + 11

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...exd5
      • 2.Sa4#
  • Tries
    • 1.Bxf6+?
      • 1...e5
        • 2.Bxe5#
      • 1...Sxf6!
    • 1.Rxe6?
      • threat
        • 2.Sa4#
        • 2.Sxa6#
        • 2.Sb7#
        • 2.Sd7#
      • 1...Sd7
        • 2.Sxd7#
      • 1...a5
        • 2.Sa4#
        • 2.Sa6#
        • 2.Sb7#
        • 2.Sd7#
      • 1...Sxe6+!
  • Keys
    • 1.Rh4!
      • threat
        • 2.Sd7#
      • 1...Ke5
        • 2.Sxd3#
      • 1...exd5
        • 2.Sa4#
      • 1...Sd7
        • 2.Sxd7#
      • 1...e5
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(h);XS(D)::QAB(F)+S(C)
  • Tries
    • Try
      • B(I);CHECK,XR(i)
      • Vars
        • P(h);P_SPINP(h)::B(I),XP(h)
      • Refutation
        • S(k);XB(I)
    • Try
      • R(H);XP(h)
      • Threat
        • DUALS(4)
      • Vars
        • S(j);::QAB(F)+S(C),XS(j)
      • Refutation
        • S(j);CHECK,XR(H)
  • Actual
    • R(E);
    • Threat
      • QAB(F)+S(C)
    • Vars
      • K(e);P_SPINP(h),S_FLIGHT::S(C),XP(c)
      • P(h);XS(D)::QAB(F)+S(C)
      • S(j);::QAB(F)+S(C),XS(j)
      • P(h);N_SPINR(i),SBLOCK::QAB(F)+S(C),DCHECK
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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).