MESON Chess Problem Database

Problem Display
PID: 181774 (8/8/2Q5/1Np5/1p6/1k6/1P6/1K6 w - - 0 1)

Fraisse, A

La Strategie, 1905

8/8/2Q5/1Np5/1p6/1k6/1P6/1K6

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...c4
      • 2.Sd4#
  • Tries
    • 1.Sa3?
      • 1...bxa3
        • 2.Qb5#
      • 1...c4!
    • 1.Sd4+?
      • 1...cxd4
        • 2.Qc2#
      • 1...Kc4!
    • 1.Sc7?
      • 1...Kc4
        • 2.Qd5#
      • 1...c4!
    • 1.Qd5+?
      • 1...c4
        • 2.Qd1#
      • 1...Ka4!
  • Keys
    • 1.Sc3!
      • 1...Kc4
        • 2.Qd5#
      • 1...bxc3
        • 2.Qb5#
      • 1...c4
        • 2.Qa4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(c);N_GUARD::S(C)
  • Tries
    • Try
      • S(C);
      • Vars
        • P(b);OGATEB,XS(C)::QAR2(D)
      • Refutation
        • P(c);
    • Try
      • S(C);CHECK
      • Vars
        • P(c);OGATE,XS(C)::QAB1(D)
      • Refutation
        • K(a);P_SPINP(c),S_FLIGHT
    • Try
      • S(C);
      • Vars
        • K(a);P_SPINP(c),S_FLIGHT::QAB1(D)
      • Refutation
        • P(c);
    • Try
      • Q(D);CHECK
      • Vars
        • P(c);P_SPINP(c),SBLOCK::QAB(D)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(C);
    • Vars
      • K(a);P_SPINP(c),S_FLIGHT::QAB1(D)
      • P(b);OGATEB,XS(C)::QAR2(D)
      • P(c);SBLOCK::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).