MESON Chess Problem Database

Problem Display
PID: 53002 (2rnnK2/2p1N3/4p3/4p3/4k3/r3p3/p3P3/1bbQ4 w - - 0 1)

Anonymous

British Chess Magazine, 1881

2rnnK2/2p1N3/4p3/4p3/4k3/r3p3/p3P3/1bbQ4

#2

4 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Ra4
      • 2.Qxa4#
  • Tries
    • 1.Qh1+?
      • 1...Kf4
        • 2.Qh4#
      • 1...Kd4!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Qb4#
        • 2.Qh4#
      • 1...Kd4
        • 2.Qb4#
      • 1...Kf4
        • 2.Qh4#
      • 1...a1Q
        • 2.Qh4#
      • 1...a1B
        • 2.Qh4#
      • 1...Rb3
        • 2.Qh4#
      • 1...Rc3
        • 2.Qh4#
      • 1...Rd3
        • 2.Qh4#
      • 1...Ra4
        • 2.Qh4#
      • 1...Rb8
        • 2.Qh4#
      • 1...Bd3
        • 2.Qh4#
      • 1...Bb2
        • 2.Qh4#
      • 1...Bd2
        • 2.Qh4#
      • 1...Sc6
        • 2.Qh4#
      • 1...Sd6
        • 2.Qh4#
      • 1...Sf6
        • 2.Qb4#
      • 1...c5
        • 2.Qh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 15
    • REMOVED MATES = 0
  • Sets
    • R(d);N_GUARD::QAR(A),XR(d)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(f);P-FLIGHT::QAR2(A)
      • Refutation
        • K(f);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • DUALS(2)
    • Vars
      • K(f);P-FLIGHT::QAR2(A)
      • P(c);::QAR(A)
      • R(d);::QAR(A)
      • R(j);::QAR(A)
      • B(a);::QAR(A)
      • B(b);::QAR(A)
      • S(k);::QAR(A)
      • S(l);::QAR(A)
      • P(i);::QAR(A)
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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).