MESON Chess Problem Database

Problem Display
PID: 187695 (1nK4B/1Q5p/2n5/p5p1/1p2k3/3p2P1/B2P3r/1R1N1R2 w - - 0 1)

van Dijk, Johannes

Haagsche Courant, 1909

1nK4B/1Q5p/2n5/p5p1/1p2k3/3p2P1/B2P3r/1R1N1R2

#2

9 + 9

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd2
      • 2.Qxh7#
    • 1...Re2
      • 2.Qxh7#
    • 1...Rg2
      • 2.Qxh7#
    • 1...Sa6
      • 2.Qxc6#
    • 1...Sd7
      • 2.Qxc6#
    • 1...b3
      • 2.Sc3#
    • 1...a4
      • 2.Rxb4#
    • 1...g4
      • 2.Rf4#
    • 1...h5
      • 2.Qh7#
    • 1...h6
      • 2.Qh7#
  • Tries
    • 1.Qxb4+?
      • 1...Sxb4
        • 2.Sc3#
      • 1...Sd4
        • 2.Sc3#
        • 2.Qxd4#
      • 1...axb4!
    • 1.Qe7+?
      • 1...Se5
        • 2.Qxe5#
      • 1...Sxe7+!
    • 1.Qf7?
      • threat
        • 2.Bd5#
        • 2.Qd5#
        • 2.Qf3#
        • 2.Qf5#
      • 1...Se7+
        • 2.Qxe7#
      • 1...Se5
        • 2.Qd5#
      • 1...Rf2
        • 2.Sxf2#
        • 2.Bd5#
        • 2.Qd5#
      • 1...Sd4
        • 2.Bd5#
        • 2.Qd5#
      • 1...b3
        • 2.Sc3#
        • 2.Qf3#
        • 2.Qf5#
      • 1...g4
        • 2.Bd5#
        • 2.Rf4#
        • 2.Qd5#
        • 2.Qf4#
        • 2.Qf5#
      • 1...Sa7+!
  • Keys
    • 1.Rf8!
      • 1...Rxd2
        • 2.Qxh7#
      • 1...b3
        • 2.Sc3#
      • 1...Rh1
        • 2.Sf2#
      • 1...Re2
        • 2.Qxh7#
      • 1...Rf2
        • 2.Sxf2#
      • 1...Rg2
        • 2.Qxh7#
      • 1...Rh3
        • 2.Sf2#
      • 1...Rh4
        • 2.Sf2#
      • 1...Rh5
        • 2.Sf2#
      • 1...Rh6
        • 2.Sf2#
      • 1...Sa6
        • 2.Qxc6#
      • 1...Sd7
        • 2.Qxc6#
      • 1...a4
        • 2.Rxb4#
      • 1...g4
        • 2.Rf4#
      • 1...h5
        • 2.Qh7#
      • 1...h6
        • 2.Qh7#

This is a version

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • R(a);N_GUARD,XP(E)::QAB(G),XP(h)
    • R(a);N_GUARD::QAB(G),XP(h)
    • S(i);N_GUARD::QAB(G),XS(g)
    • P(c);N_GUARD::S(B)
    • P(e);N_GUARD::R(A),XP(c)
    • P(f);N_GUARD::R1(C)
    • P(h);S_CUTR(a)::QAB(G)
  • Tries
    • Try
      • Q(G);CHECK,N_PINS(g),XP(c)
      • Vars
        • S(g);XQ(G)::S(B)
      • Refutation
        • P(e);XQ(G)
    • Try
      • Q(G);CHECK,N_PINS(g)
      • Vars
        • S(g);N_GUARD,P_SPINS(g)::QAR1(G),XS(g)
      • Refutation
        • S(g);CHECK,XQ(G)
    • Try
      • Q(G);N_PINS(g)
      • Threat
        • DUALS(4)
      • Vars
        • S(g);CHECK,N_GUARD::QAR(G),XS(g)
        • S(g);::QAB1(G)
      • Refutation
        • S(g);CHECK
  • Actual
    • R(C);
    • Vars
      • R(a);N_GUARD,XP(E)::QAB(G),XP(h)
      • P(c);N_GUARD::S(B)
      • R(a);N_GUARD::S(B)
      • R(a);N_GUARD::QAB(G),XP(h)
      • R(a);N_GUARD::S(B),XR(a)
      • S(i);N_GUARD::QAB(G),XS(g)
      • P(e);N_GUARD::R(A),XP(c)
      • P(f);N_GUARD::R1(C)
      • P(h);S_CUTR(a)::QAB(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).