MESON Chess Problem Database

Problem Display
PID: 194441 (8/8/8/4Q1N1/8/3K2p1/5p2/5kr1 w - - 0 1)

Helweg, Steffen ('Cyrano')

Berlinske Tidende, 1936

8/8/8/4Q1N1/8/3K2p1/5p2/5kr1

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Rg2
      • 2.Qa1#
    • 1...g2
      • 2.Qa1#
      • 2.Qe2#
  • Tries
    • 1.Qe4?
      • 1...Rh1
        • 2.Qxh1#
      • 1...g2
        • 2.Qe2#
      • 1...Rg2!
  • Keys
    • 1.Qh8!
      • 1...Ke1
        • 2.Qa1#
      • 1...Kg2
        • 2.Qh3#
      • 1...Rh1
        • 2.Qxh1#
      • 1...Rg2
        • 2.Qa1#
      • 1...g2
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(b);SBLOCK::QAR(B)
  • Tries
    • Try
      • Q(B);
      • Vars
        • R(b);OGATEB::QAR2(B),XR(b)
        • P(d);SBLOCK::QAB1(B)
      • Refutation
        • R(b);
  • Actual
    • Q(B);
    • Vars
      • K(a);P-FLIGHT::QAR(B)
      • K(a);S_FLIGHT::QAB1(B)
      • R(b);OGATEB::QAR2(B),XR(b)
      • R(b);SBLOCK::QAR(B)
      • P(d);SBLOCK::QAR(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).