MESON Chess Problem Database

Problem Display
PID: 96962 (n1r5/n4R1p/1pk5/3NB2Q/PP4r1/1N6/K2R4/8 w - - 0 1)

Madsen, Arthur Valdemar

Problemnoter, 1960

n1r5/n4R1p/1pk5/3NB2Q/PP4r1/1N6/K2R4/8

#2

9 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb4
      • 2.Sxb4#
      • 2.Qh6#
    • 1...Rc4
      • 2.Qh6#
    • 1...Re4
      • 2.Qh6#
    • 1...b5
      • 2.Sa5#
  • Tries
    • 1.Rf6+?
      • 1...Kd7
        • 2.Rd6#
      • 1...Kb7!
    • 1.Rxa7?
      • threat
        • 2.Se7#
        • 2.b5#
      • 1...Rxb4
        • 2.Sxb4#
        • 2.Se7#
        • 2.Qh6#
      • 1...Rd4
        • 2.Se7#
      • 1...Sc7
        • 2.Se7#
      • 1...Rg7
        • 2.b5#
      • 1...Re8
        • 2.Qxe8#
        • 2.b5#
      • 1...b5
        • 2.Sa5#
      • 1...Rc7!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Se7#
      • 1...Rg2
        • 2.Qc1#
      • 1...Rd4
        • 2.Sxd4#
      • 1...Re4
        • 2.Qh6#
      • 1...b5
        • 2.Sa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(a);N_GUARD::QAR(H)
    • P(b);N_GUARD::S(C)
  • Tries
    • Try
      • R(I);CHECK
      • Vars
        • K(c);S_FLIGHT::R1(I)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(I);XS(d)
      • Threat
        • DUALS(2)
      • Vars
        • R(a);::S(F)
        • S(f);::S(F)
        • R(a);::P(E)
        • P(b);N_GUARD::S(C)
      • Refutation
        • R(g);
  • Actual
    • Q(H);
    • Threat
      • QAB(H)+S(F),DCHECK
    • Vars
      • R(a);N_GUARD,P_PINR(B)::QAR(H)
      • R(a);N_GUARD::S(C),XR(a)
      • R(a);N_GUARD::QAR(H)
      • P(b);N_GUARD::S(C)
HTML5 logo

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).