MESON Chess Problem Database

Problem Display
PID: 52917 (2bQ4/p7/B7/P1P1nr2/k1N5/p1K2p2/3R4/8 w - - 0 1)

Louhi, Vilho

3rd HM., Source?, 0000

2bQ4/p7/B7/P1P1nr2/k1N5/p1K2p2/3R4/8

#2

7 + 7

117 Suomen Shakki 1926

SOLUTION

  • SOUND
  • Sets
    • 1...a2
      • 2.Rxa2#
  • Tries
    • 1.Qb6?
      • threat
        • 2.Bb5#
        • 2.Qb3#
        • 2.Qb4#
        • 2.Qb5#
      • 1...Bxa6
        • 2.Qb3#
        • 2.Qb4#
      • 1...Sxc4
        • 2.Bb5#
        • 2.Qb4#
        • 2.Qb5#
      • 1...Bd7
        • 2.Qb3#
        • 2.Qb4#
      • 1...Sd3
        • 2.Bb5#
        • 2.Qb3#
        • 2.Qb5#
        • 2.Qc6#
      • 1...Sc6
        • 2.Bb5#
        • 2.Qb3#
        • 2.Qb5#
        • 2.Qxc6#
      • 1...axb6!
  • Keys
    • 1.Rb2!
      • threat
        • 2.Bb5#
        • 2.Rb4#
        • 2.Qd1#
      • 1...Bxa6
        • 2.Rb4#
        • 2.Qd1#
      • 1...Sxc4
        • 2.Bb5#
        • 2.Rb4#
      • 1...axb2
        • 2.Qd1#
      • 1...Bd7
        • 2.Rb4#
      • 1...Sd3
        • 2.Bb5#
      • 1...Sc6
        • 2.Bb5#
        • 2.Qd1#
      • 1...Sd7
        • 2.Bb5#
        • 2.Rb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(a);OGATEB::R(A),XP(a)
  • Tries
    • Try
      • Q(G);
      • Threat
        • DUALS(4)
      • Refutation
        • P(f);XQ(G)
  • Actual
    • R(A);
    • Threat
      • DUALS(3)
    • Vars
      • P(a);XR(A)::QAB(G)
      • B(g);::R1(A)
      • S(d);::B(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).