MESON Chess Problem Database

Problem Display
PID: 231283 (5R2/1K6/3pp3/1Q1Bk3/R2p4/5p2/n7/b7 w - - 0 1)

van Dijk, Johannes

De Maasbode, 1927

5R2/1K6/3pp3/1Q1Bk3/R2p4/5p2/n7/b7

#2

5 + 7

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...d3
      • 2.Re4#
    • 1...exd5
      • 2.Qe8#
  • Tries
    • 1.Qe2+?
      • 1...Kxd5
        • 2.Ra5#
      • 1...fxe2!
    • 1.Qd7?
      • threat
        • 2.Qxe6#
      • 1...exd5
        • 2.Qf5#
        • 2.Qe8#
        • 2.Qe7#
      • 1...Kxd5!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Qe4#
      • 1...Kxd5
        • 2.Ra5#
      • 1...exd5
        • 2.Qf5#
      • 1...Sc3
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(d);OGATE::R1(A)
    • P(g);OGATEB,P_SPINP(g),SBLOCK,XB(C)::QAR(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(e);P-FLIGHT,XB(C)::R(A)
      • Refutation
        • P(c);XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAR1(B),XP(g)
      • Refutation
        • K(e);P-FLIGHT,P_SPINP(f),XB(C)
  • Actual
    • Q(B);
    • Threat
      • QAR1(B)
    • Vars
      • K(e);OGATEB,P-FLIGHT,P_SPINP(d),XB(C)::R(A)
      • P(g);N_GUARD,SBLOCK,XB(C)::QAR1(B)
      • S(b);S_CUTB(a)::QAB1(B),XP(d)
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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).