MESON Chess Problem Database

Problem Display
PID: 174916 (4n3/1Np3n1/2B4N/2p1k2p/7Q/2P5/5P1K/8 w - - 0 1)

Mazel, Eduard

Sachove listy, 1901

4n3/1Np3n1/2B4N/2p1k2p/7Q/2P5/5P1K/8

#2

7 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Qg5+?
      • 1...Sf5
        • 2.Qxf5#
      • 1...Ke6!
    • 1.Qe7+?
      • 1...Kf4
        • 2.Qe3#
      • 1...Se6!
  • Keys
    • 1.Sd8!
      • 1...Kd6
        • 2.Shf7#
      • 1...Sf5
        • 2.Shf7#
      • 1...Se6
        • 2.Sdf7#
      • 1...Sd6
        • 2.f4#
      • 1...Sf6
        • 2.Qg3#
      • 1...c4
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAR1(D),XS(e)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(D)
      • Refutation
        • S(e);P_SPINS(e)
  • Actual
    • S(G);
    • Vars
      • K(b);S_FLIGHT::S(F)
      • S(e);SBLOCK::S(F)
      • S(e);SBLOCK::S(G)
      • S(f);SBLOCK::P(A)
      • S(f);SBLOCK::QAB(D)
      • P(a);N_GUARD::QAB1(D)
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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).