MESON Chess Problem Database

Problem Display
PID: 181832 (1r6/6p1/nRR3K1/3kp3/2p1p1p1/6Q1/2P1N3/3r4 w - - 0 1)

van Dijk, Johannes

Sydney Morning Herald, 1905

1r6/6p1/nRR3K1/3kp3/2p1p1p1/6Q1/2P1N3/3r4

#2

6 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Sc3#
    • 1...Sc5
      • 2.Rd6#
  • Tries
    • 1.Sf4+?
      • 1...Kd4
        • 2.c3#
      • 1...exf4!
    • 1.Qc3?
      • threat
        • 2.Qxc4#
      • 1...Sc5
        • 2.Rd6#
      • 1...Rd4!
    • 1.Qe3?
      • threat
        • 2.Sc3#
        • 2.Rd6#
      • 1...Rd3
        • 2.Rd6#
      • 1...Rd4
        • 2.Sc3#
      • 1...Rd8
        • 2.Sc3#
      • 1...c3
        • 2.Sxc3#
      • 1...Rxb6!
    • 1.Qxg4?
      • threat
        • 2.Qe6#
        • 2.Qd7#
      • 1...Rb7
        • 2.Qe6#
      • 1...Rd8
        • 2.Qe6#
      • 1...Re8
        • 2.Qd7#
      • 1...Sc5
        • 2.Rd6#
      • 1...Sc7
        • 2.Qd7#
      • 1...e3
        • 2.Sc3#
        • 2.Qxc4#
      • 1...Rg1!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Qxc4#
      • 1...cxb3
        • 2.c4#
      • 1...Rd4
        • 2.Sc3#
      • 1...Sc5
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(a);SBLOCK::S(B)
    • S(g);SBLOCK::R1(E)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(e);P-FLIGHT::P(A)
      • Refutation
        • P(f);XS(B)
    • Try
      • Q(C);
      • Threat
        • QAB1(C),XP(b)
      • Vars
        • S(g);SBLOCK::R1(E)
      • Refutation
        • R(a);
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);::R1(E)
        • R(a);::S(B)
        • R(i);::S(B)
        • P(b);::S(B),XP(b)
      • Refutation
        • R(i);P_PINR(E),XR(D)
    • Try
      • Q(C);XP(d)
      • Threat
        • DUALS(2)
      • Vars
        • R(i);::QAB1(C)
        • R(i);::QAR2(C)
        • S(g);SBLOCK::R1(E)
        • S(g);::QAR2(C)
      • Refutation
        • R(a);P_PINQ(C)
  • Actual
    • Q(C);P_PINP(b)
    • Threat
      • QAB1(C),XP(b)
    • Vars
      • P(b);N_SPINP(b),OGATE,XQ(C)::P(A)
      • R(a);SBLOCK::S(B)
      • S(g);SBLOCK::R1(E)
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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).