MESON Chess Problem Database

Problem Display
PID: 198889 (8/2p2K2/6p1/1pP1kpPb/1n2BN2/1n2BP2/1P2Q3/8 w - - 0 1)

Church, EL

San Francisco Chronicle, 1921

8/2p2K2/6p1/1pP1kpPb/1n2BN2/1n2BP2/1P2Q3/8

#2

9 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bg4
      • 2.Sxg6#
    • 1...Sa2
      • 2.Sd3#
    • 1...Sc2
      • 2.Sd3#
    • 1...Sd3
      • 2.Sxd3#
    • 1...Sd5
      • 2.Sd3#
    • 1...Sa6
      • 2.Sd3#
    • 1...Sc6
      • 2.Sd3#
  • Tries
    • 1.Qc4?
      • threat
        • 2.Qe6#
      • 1...Sxc5
        • 2.Qd4#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sd5
        • 2.Sd3#
        • 2.Qxd5#
      • 1...bxc4!
  • Keys
    • 1.Qd3!
      • 1...Bxf3
        • 2.Sxg6#
      • 1...Sxc5
        • 2.Qd4#
      • 1...Sxd3
        • 2.Sxd3#
      • 1...fxe4
        • 2.Qxe4#
      • 1...Sa1
        • 2.Qc3#
        • 2.Qd4#
      • 1...Bg4
        • 2.Sxg6#
      • 1...Sc1
        • 2.Qc3#
        • 2.Qd4#
      • 1...Sd2
        • 2.Qc3#
        • 2.Qd4#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sa5
        • 2.Qc3#
        • 2.Qd4#
      • 1...Sa2
        • 2.Qd5#
      • 1...Sc2
        • 2.Qd5#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sa6
        • 2.Qd5#
      • 1...Sc6
        • 2.Qd5#
      • 1...c6
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 5
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • B(f);N_GUARD::S(F),XP(g)
    • S(b);N_GUARD::S(F)
    • S(b);N_GUARD::S(F),XS(b)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • S(a);N_GUARD,XP(G)::QAB1(B)
        • S(a);N_GUARD::QAB1(B),XS(a)
      • Refutation
        • P(c);XQ(B)
  • Actual
    • Q(B);
    • Vars
      • B(f);N_GUARD,XP(D)::S(F),XP(g)
      • S(a);N_GUARD,XP(G)::QAB1(B)
      • S(b);XQ(B)::S(F),XS(b)
      • P(e);OGATE,XB(E)::QAR1(B),XP(e)
      • B(f);N_GUARD::S(F),XP(g)
      • S(a);N_GUARD::QAB1(B),XS(a)
      • S(b);N_GUARD::QAR1(B)
      • S(b);N_GUARD::QAR1(B),XS(b)
      • P(h);N_GUARD::QAB1(B)
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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).