MESON Chess Problem Database

Problem Display
PID: 224709 (3r4/2q3b1/1p5p/2R2Nnk/3pBQp1/3N2P1/1K6/8 w - - 0 1)

Boatrite, AV

The Sunny South, 1888

3r4/2q3b1/1p5p/2R2Nnk/3pBQp1/3N2P1/1K6/8

#2

7 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf4
      • 2.Sxf4#
      • 2.Sxg7#
    • 1...Qd6
      • 2.Sxg7#
    • 1...Qb8
      • 2.Sxg7#
    • 1...Qxc5
      • 2.Sxg7#
    • 1...Qc6
      • 2.Sxg7#
    • 1...Qc8
      • 2.Sxg7#
    • 1...Sf3
      • 2.Sxg7#
    • 1...Sh3
      • 2.Sxg7#
    • 1...Se6
      • 2.Sxg7#
    • 1...Sf7
      • 2.Sxg7#
    • 1...Sh7
      • 2.Sxg7#
  • Keys
    • 1.Qd6!
      • threat
        • 2.Sf4#
      • 1...Qxd6
        • 2.Sxg7#
      • 1...Sxe4
        • 2.Sxg7#
      • 1...Sf3
        • 2.Sxg7#
      • 1...Sh3
        • 2.Sxg7#
      • 1...Se6
        • 2.Sxg7#
      • 1...Sf7
        • 2.Sxg7#
      • 1...Sh7
        • 2.Sxg7#
      • 1...Be5
        • 2.Qxh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(g);N_GUARD::S(G),XB(h)
    • Q(g);N_GUARD,XR(F)::S(G),XB(h)
    • S(c);::R(F)+S(G),DCHECK,XB(h)
  • Actual
    • Q(E);
    • Threat
      • S(B)
    • Vars
      • Q(g);N_GUARD,XQ(E)::S(G),XB(h)
      • S(c);XB(D)::R(F)+S(G),DCHECK,XB(h)
      • S(c);::R(F)+S(G),DCHECK,XB(h)
      • B(h);N_GUARD::QAR1(E),XP(f)
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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).