MESON Chess Problem Database

Problem Display
PID: 196542 (N7/1p3Q2/pR6/2k3NK/3r1p2/4P3/8/8 w - - 0 1)

Ruonala, Lauri Armas

2nd HM., Suomen Shakki, 1954

N7/1p3Q2/pR6/2k3NK/3r1p2/4P3/8/8

#2

6 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Se4#
    • 1...Rd2
      • 2.Se4#
    • 1...Rd3
      • 2.Se4#
    • 1...Rc4
      • 2.Qf5#
    • 1...Re4
      • 2.Sxe4#
    • 1...Rd5
      • 2.Qc7#
    • 1...Rd6
      • 2.Se4#
    • 1...Rd7
      • 2.Se4#
    • 1...Rd8
      • 2.Se4#
  • Tries
    • 1.Qb3?
      • threat
        • 2.Se6#
      • 1...Re4
        • 2.Sxe4#
      • 1...Rd5
        • 2.Qc2#
        • 2.Qc3#
        • 2.Qb4#
      • 1...Rd6
        • 2.Se4#
      • 1...Rc4!
    • 1.Qf5+?
      • 1...Rd5
        • 2.Qc2#
        • 2.Qc8#
      • 1...Kc4!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Se6#
      • 1...Rc4
        • 2.Qa5#
      • 1...Re4
        • 2.Sxe4#
      • 1...Rd5
        • 2.Qc2#
      • 1...Rd6
        • 2.Se4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • R(a);N_GUARD::S(B)
    • R(a);N_GUARD,SBLOCK::QAR(E)
    • R(a);N_GUARD::S(B),XR(a)
    • R(a);P_PINS(B),SBLOCK::QAR2(E)
  • Tries
    • Try
      • Q(E);
      • Threat
        • S(B)
      • Vars
        • R(a);N_GUARD::S(B),XR(a)
        • R(a);N_GUARD::S(B)
      • Refutation
        • R(a);
    • Try
      • Q(E);CHECK
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • Q(E);
    • Threat
      • S(B)
    • Vars
      • R(a);SBLOCK::QAR2(E)
      • R(a);N_GUARD::S(B),XR(a)
      • R(a);N_GUARD,P_PINS(B),SBLOCK::QAR(E)
      • R(a);N_GUARD::S(B)
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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).