MESON Chess Problem Database

Problem Display
PID: 108926 (4N3/8/2N5/3B1k1K/n1p4B/q2pP3/8/b7 w - - 0 1)

Melders, Visvaldis

Riga Central CC, 1952

4N3/8/2N5/3B1k1K/n1p4B/q2pP3/8/b7

#2

6 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Sd6#
    • 1...Qb2
      • 2.Sd6#
    • 1...Qd6
      • 2.Sxd6#
    • 1...Qa2
      • 2.Sd6#
    • 1...Qb3
      • 2.Sd6#
    • 1...Qc3
      • 2.Sd6#
    • 1...Bg7
      • 2.Sxg7#
    • 1...Sb2
      • 2.Sg7#
    • 1...Sc3
      • 2.Sg7#
    • 1...Sc5
      • 2.Sd6#
    • 1...c3
      • 2.Sg7#
  • Tries
    • 1.Se7+?
      • 1...Ke5
        • 2.Bg3#
        • 2.Bf6#
      • 1...Qxe7!
    • 1.Bg5?
      • threat
        • 2.e4#
      • 1...Sc3
        • 2.Sg7#
      • 1...Sc5
        • 2.Sd6#
      • 1...Qe7!
  • Keys
    • 1.Bg3!
      • threat
        • 2.e4#
      • 1...Qe7
        • 2.Sxe7#
      • 1...Sc3
        • 2.Sd4#
      • 1...Sc5
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 9
  • Sets
    • Q(b);N_GUARD::S(F)
    • Q(b);N_GUARD::S(F),XQ(b)
    • B(a);N_GUARD::S(F),XB(a)
    • S(d);S_CUTB(a)::S(F)
    • S(d);S_CUTQ(b)::S(F)
    • P(e);S_CUTB(a)::S(F)
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • Q(b);XS(E)
    • Try
      • B(B);
      • Threat
        • P(A)
      • Vars
        • S(d);S_CUTB(a)::S(F)
        • S(d);S_CUTQ(b)::S(F)
      • Refutation
        • Q(b);
  • Actual
    • B(B);
    • Threat
      • P(A)
    • Vars
      • Q(b);N_GUARD::S(E),XQ(b)
      • S(d);S_CUTB(a)::S(E)
      • S(d);S_CUTQ(b)::S(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).