MESON Chess Problem Database

Problem Display
PID: 120005 (8/4N1pp/7b/1Q4pk/4P2p/7p/3K3P/8 w - - 0 1)

Kubbel, Arvid Ivanovich

Shakhmatnoe obozrenie, 1907

8/4N1pp/7b/1Q4pk/4P2p/7p/3K3P/8

#2

5 + 7

6490 yacpdb 2009
5454 Near Snap 2014

SOLUTION

  • SOUND
  • Tries
    • 1.Ke3?
      • 1...Kg4
        • 2.Qe2#
      • 1...g6!
    • 1.Sg8?
      • 1...Kg6
        • 2.Qe8#
      • 1...g6
        • 2.Sf6#
      • 1...Kg4!
  • Keys
    • 1.Sd5!
      • 1...g4+
        • 2.Sf4#
      • 1...Kg4
        • 2.Qe2#
      • 1...Kg6
        • 2.Qe8#
      • 1...g6
        • 2.Sf6#

This anticipates 120974(1935)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • K(d);N_SPINP(c),S_FLIGHT::QAB(D)
      • Refutation
        • P(f);
    • Try
      • S(E);
      • Vars
        • K(d);N_SPINP(c),S_FLIGHT::QAB(D)
        • P(f);N_GUARD,SBLOCK::S(E)
      • Refutation
        • K(d);N_SPINP(c),S_FLIGHT
  • Actual
    • S(E);N_PINP(c)
    • Vars
      • P(c);CHECK,SBLOCK::QAR(D)+S(E),DCHECK
      • K(d);S_FLIGHT::QAB(D)
      • P(f);N_GUARD,SBLOCK::S(E)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).