MESON Chess Problem Database

Problem Display
PID: 197405 (2b5/5R2/1K1k1p2/2N1p3/2B1p1q1/4N3/8/8 w - - 0 1)

Briet, G

diagrammes, 1974

2b5/5R2/1K1k1p2/2N1p3/2B1p1q1/4N3/8/8

#2

5 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Sxe4#
    • 1...Qe2
      • 2.Sxe4#
    • 1...Qh3
      • 2.Sxe4#
    • 1...Qh5
      • 2.Sxe4#
    • 1...Qe6
      • 2.Sxe4#
    • 1...Qd7
      • 2.Sxe4#
    • 1...Qg1
      • 2.Sxe4#
    • 1...Qg3
      • 2.Sxe4#
    • 1...Qg5
      • 2.Sxe4#
    • 1...Qg7
      • 2.Sxe4#
    • 1...Qg8
      • 2.Sxe4#
    • 1...Bf5
      • 2.Sb7#
    • 1...Be6
      • 2.Sb7#
    • 1...Bb7
      • 2.Sxb7#
    • 1...Bd7
      • 2.Sb7#
  • Tries
    • 1.Sxg4?
      • threat
        • 2.Sxe4#
      • 1...Bf5
        • 2.Sb7#
      • 1...Bb7
        • 2.Sxb7#
        • 2.Rd7#
      • 1...e3
        • 2.Se4#
      • 1...f5!
    • 1.Sf5+?
      • 1...Bxf5
        • 2.Sb7#
      • 1...Qxf5!
  • Keys
    • 1.Be6!
      • threat
        • 2.Sc4#
      • 1...Qxe6
        • 2.Sxe4#
      • 1...Bxe6
        • 2.Sb7#
      • 1...Qe2
        • 2.Sf5#
      • 1...Ba6
        • 2.Rd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 12
  • Sets
    • Q(b);N_GUARD::S(C),XP(a)
    • B(f);N_GUARD::S(C)
    • B(f);N_GUARD::S(C),XB(f)
  • Tries
    • Try
      • S(A);XQ(b)
      • Threat
        • S(C),XP(a)
      • Vars
        • B(f);N_GUARD::S(C)
        • P(a);::S(C)
      • Refutation
        • P(e);
    • Try
      • S(A);CHECK
      • Vars
        • B(f);XS(A)::S(C)
      • Refutation
        • Q(b);XS(A)
  • Actual
    • B(B);
    • Threat
      • S(A)
    • Vars
      • Q(b);N_GUARD,SBLOCK,XB(B)::S(C),XP(a)
      • B(f);N_GUARD,SBLOCK,XB(B)::S(C)
      • Q(b);N_GUARD::S(A)
      • B(f);N_GUARD::R1(E)
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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).