MESON Chess Problem Database

Problem Display
PID: 194834 (3Q4/K7/4r3/4R3/2k1rn2/Pn2R3/8/B5q1 w - - 0 1)

Anonymous

Sissa, 1863

3Q4/K7/4r3/4R3/2k1rn2/Pn2R3/8/B5q1

#2

6 + 6

14986 White-Hume Collection 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qh2
      • 2.Rc3#
    • 1...Qb1
      • 2.Rc3#
    • 1...Qd1
      • 2.Rc3#
    • 1...Qf1
      • 2.Rc3#
    • 1...Qh1
      • 2.Rc3#
    • 1...Qg2
      • 2.Rc3#
    • 1...Qg4
      • 2.Rc3#
    • 1...Qg5
      • 2.Rc3#
    • 1...Qg6
      • 2.Rc3#
    • 1...Qg8
      • 2.Rc3#
    • 1...Rd4
      • 2.Rc3#
    • 1...Rb6
      • 2.Rc3#
    • 1...Sd4
      • 2.Rc3#
    • 1...Se2
      • 2.Qd3#
      • 2.Qd5#
    • 1...Sg2
      • 2.Qd3#
      • 2.Qd5#
    • 1...Sd3
      • 2.Qxd3#
      • 2.Qd5#
    • 1...Sh3
      • 2.Qd3#
      • 2.Qd5#
    • 1...Sd5
      • 2.Qxd5#
    • 1...Sh5
      • 2.Qd3#
      • 2.Qd5#
    • 1...Sg6
      • 2.Qd3#
      • 2.Qd5#
  • Tries
    • 1.Qc7+?
      • 1...Sc5
        • 2.Rxc5#
        • 2.Qxc5#
      • 1...Rc6!
    • 1.Qc8+?
      • 1...Sc5
        • 2.Rxc5#
        • 2.Qxc5#
      • 1...Rc6!
  • Keys
    • 1.Qd4+!
      • 1...Rxd4
        • 2.Rc3#
      • 1...Sxd4
        • 2.Rc3#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 12
  • Sets
    • Q(a);N_PINR(C)::R1(C)
    • R(d);N_PINR(C)::R1(C)
    • R(f);N_PINR(C)::R1(C)
    • S(b);N_PINR(C)::R1(C)
    • S(e);N_GUARD::QAB1(F),XS(e)
  • Tries
    • Try
      • Q(F);CHECK
      • Refutation
        • R(f);P_SPINR(f)
    • Try
      • Q(F);CHECK
      • Refutation
        • R(f);P_SPINR(f)
  • Actual
    • Q(F);CHECK,N_SPINR(C)
    • Vars
      • R(d);SBLOCK,XQ(F)::R1(C)
      • S(b);SBLOCK,XQ(F)::R1(C)
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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).