MESON Chess Problem Database

Problem Display
PID: 202423 (B5b1/4K3/8/3Nk1p1/6Q1/8/8/3r4 w - - 0 1)

Jakab, Arpad

1st Prize, Sydsvenska Dagbladet Snallposten, 1923

B5b1/4K3/8/3Nk1p1/6Q1/8/8/3r4

#2

4 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Sf6?
      • threat
        • 2.Qe4#
      • 1...Rd7+
        • 2.Sxd7#
      • 1...Bd5
        • 2.Sd7#
      • 1...Re1
        • 2.Sd7#
      • 1...Rd4
        • 2.Qxg5#
      • 1...Bh7!
  • Keys
    • 1.Sb6!
      • threat
        • 2.Qe4#
      • 1...Rd7+
        • 2.Sxd7#
      • 1...Bd5
        • 2.Sd7#
      • 1...Re1
        • 2.Sd7#
      • 1...Rd4
        • 2.Qxg5#
      • 1...Rd5
        • 2.Sc4#
      • 1...Bh7
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Threat
        • QAR1(A)
      • Vars
        • R(a);CHECK,N_GUARD::S(B),XR(a)
        • B(d);S_CUTR(a)::S(B)
        • R(a);N_GUARD::S(B)
        • R(a);SBLOCK::QAR2(A),XP(c)
      • Refutation
        • B(d);
  • Actual
    • S(B);
    • Threat
      • QAR1(A)
    • Vars
      • R(a);CHECK,N_GUARD::S(B),XR(a)
      • B(d);S_CUTR(a)::S(B)
      • R(a);N_GUARD::S(B)
      • R(a);SBLOCK::QAR2(A),XP(c)
      • R(a);S_CUTB(d)::S(B)
      • B(d);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).