MESON Chess Problem Database

Problem Display
PID: 160057 (5K2/5N1k/Q2N2p1/7n/8/7n/8/8 w - - 0 1)

Roze, Claude

Schach, 2001

5K2/5N1k/Q2N2p1/7n/8/7n/8/8

#2

4 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...g5
      • 2.Qd3#
  • Tries
    • 1.Sg5+?
      • 1...Kh6
        • 2.Sdf7#
      • 1...Kh8
        • 2.Sdf7#
      • 1...Sxg5!
    • 1.Qa1?
      • threat
        • 2.Qh8#
      • 1...g5
        • 2.Qb1#
      • 1...Sg7
        • 2.Qxg7#
      • 1...Sf6!
  • Keys
    • 1.Se4!
      • 1...Sg1
        • 2.Seg5#
      • 1...Sf2
        • 2.Seg5#
      • 1...S3f4
        • 2.Seg5#
      • 1...Sg5
        • 2.Sexg5#
      • 1...Sg3
        • 2.Sf6#
      • 1...S5f4
        • 2.Sf6#
      • 1...Sf6
        • 2.Sxf6#
      • 1...Sg7
        • 2.Sf6#
      • 1...g5
        • 2.Qh6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATEB::QAB(A)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(d);P-FLIGHT::S(B)
      • Refutation
        • S(a);XS(C)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • P(c);OGATEB::QAB(A)
        • S(b);N_GUARD::QAR1(A),XS(b)
      • Refutation
        • S(b);
  • Actual
    • S(B);
    • Vars
      • S(a);N_GUARD::S(B)
      • S(a);N_GUARD::S(B),XS(a)
      • S(b);N_GUARD::S(B)
      • S(b);N_GUARD::S(B),XS(b)
      • P(c);OGATE::QAR1(A)
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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).