MESON Chess Problem Database

Problem Display
PID: 101171 (8/5Q2/8/2p1K2n/5NB1/4k3/3p1pR1/n7 w - - 0 1)

Opdenoordt, Joseph J

4th Prize=, Good Companions (February Meredith Ty.), 1917

8/5Q2/8/2p1K2n/5NB1/4k3/3p1pR1/n7

#2

5 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Qb3#
    • 1...Sb3
      • 2.Qxb3#
    • 1...Sg3
      • 2.Rxg3#
    • 1...Sxf4
      • 2.Rg3#
    • 1...Sf6
      • 2.Rg3#
    • 1...Sg7
      • 2.Rg3#
    • 1...f1S
      • 2.Re2#
    • 1...f1R
      • 2.Re2#
    • 1...c4
      • 2.Qa7#
  • Tries
    • 1.Qc4?
      • threat
        • 2.Sd5#
        • 2.Qe2#
        • 2.Qd3#
        • 2.Qc3#
        • 2.Qe4#
        • 2.Qxc5#
      • 1...Sxf4
        • 2.Rg3#
        • 2.Qe4#
      • 1...d1S
        • 2.Qe2#
        • 2.Qd3#
        • 2.Qc1#
      • 1...d1B
        • 2.Qd3#
        • 2.Qc1#
        • 2.Qc3#
      • 1...d1R
        • 2.Qe2#
      • 1...f1Q
        • 2.Sd5#
        • 2.Qe4#
        • 2.Qxc5#
      • 1...f1B
        • 2.Sd5#
        • 2.Qe4#
        • 2.Qxc5#
      • 1...Sc2
        • 2.Sd5#
        • 2.Qe2#
        • 2.Qb3#
        • 2.Qd3#
        • 2.Qc3#
        • 2.Qe4#
      • 1...Sb3
        • 2.Sd5#
        • 2.Qe2#
        • 2.Qxb3#
        • 2.Qd3#
        • 2.Qc3#
        • 2.Qe4#
      • 1...Sg3
        • 2.Sd5#
        • 2.Rxg3#
        • 2.Qd3#
        • 2.Qc3#
        • 2.Qxc5#
      • 1...Sf6
        • 2.Rg3#
        • 2.Qe2#
        • 2.Qd3#
        • 2.Qc3#
        • 2.Qxc5#
      • 1...d1Q!
  • Keys
    • 1.Qa2!
      • 1...Sxf4
        • 2.Rg3#
      • 1...d1Q
        • 2.Qxf2#
      • 1...d1S
        • 2.Qe2#
      • 1...d1B
        • 2.Qxf2#
      • 1...d1R
        • 2.Qe2#
        • 2.Qxf2#
      • 1...f1Q
        • 2.Qxd2#
      • 1...f1S
        • 2.Re2#
      • 1...f1B
        • 2.Qxd2#
      • 1...f1R
        • 2.Re2#
        • 2.Qxd2#
      • 1...Sc2
        • 2.Qb3#
      • 1...Sb3
        • 2.Qxb3#
      • 1...Sg3
        • 2.Rxg3#
      • 1...Sf6
        • 2.Rg3#
      • 1...Sg7
        • 2.Rg3#
      • 1...c4
        • 2.Qa7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD::QAR(E)
    • S(a);N_GUARD::QAR(E),XS(a)
    • S(f);N_GUARD::R(A),XS(f)
    • S(f);N_GUARD,XS(B)::R(A)
    • S(f);N_GUARD::R(A)
    • P(c);OGATE::R1(A)
    • P(e);OGATEB::QAB(E)
  • Tries
    • Try
      • Q(E);
      • Threat
        • DUALS(6)
      • Vars
        • P(b);::QAR1(E)
      • Refutation
        • P(b);
  • Actual
    • Q(E);
    • Vars
      • S(f);N_GUARD,XS(B)::R(A)
      • P(b);OGATE::QAB1(E),XP(c)
      • P(b);OGATE::QAR1(E)
      • P(c);::QAB1(E),XP(b)
      • P(c);OGATE::R1(A)
      • S(a);N_GUARD::QAR(E)
      • S(a);N_GUARD::QAR(E),XS(a)
      • S(f);N_GUARD::R(A),XS(f)
      • S(f);N_GUARD::R(A)
      • P(e);OGATEB::QAB(E)
HTML5 logo

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).