MESON Chess Problem Database

Problem Display
PID: 208835 (8/3pp3/2Q2r2/2R2p2/4b3/3N4/2BkPK2/8 w - - 0 1)

Anonymous

Detroit Free Press, 1876

8/3pp3/2Q2r2/2R2p2/4b3/3N4/2BkPK2/8

#2

6 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Qa4?
      • threat
        • 2.Qb4#
        • 2.Qa5#
      • 1...Bxd3
        • 2.Qf4#
      • 1...Ra6
        • 2.Qb4#
      • 1...Rb6!
    • 1.Qxe4?
      • threat
        • 2.Qe3#
        • 2.Qb4#
        • 2.Qf4#
      • 1...Rb6
        • 2.Qe3#
        • 2.Qf4#
      • 1...Re6
        • 2.Qb4#
      • 1...f4
        • 2.Qb4#
      • 1...e5
        • 2.Qe3#
        • 2.Qb4#
      • 1...fxe4+!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Qf4#
        • 2.Qa5#
      • 1...Bxd3
        • 2.Qf4#
      • 1...Rb6
        • 2.Qf4#
      • 1...Ra6
        • 2.Qf4#
      • 1...Rd6
        • 2.Qa5#
      • 1...f4
        • 2.Qa5#
      • 1...d6
        • 2.Qa5#
      • 1...e5
        • 2.Qa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • B(b);OGATE,XS(D)::QAB(F)
        • R(d);::QAB(F)
      • Refutation
        • R(d);
    • Try
      • Q(F);XB(b)
      • Threat
        • DUALS(3)
      • Vars
        • R(d);::QAB(F)
        • P(c);::QAB(F)
      • Refutation
        • P(c);CHECK,XQ(F)
  • Actual
    • Q(F);
    • Threat
      • DUALS(2)
    • Vars
      • B(b);XS(D)::QAB(F)
      • R(d);::QAB(F)
      • P(c);::QAB(F)
      • P(e);::QAB(F)
      • P(f);::QAB(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).