MESON Chess Problem Database

Problem Display
PID: 261169 (5n1q/6p1/R6p/K1p2k1b/4N3/2BP1p1N/8/3Q2R1 w - - 0 1)

Schaffner, Gerold

3rd HM., Neue Zurcher Zeitung, 1994

5n1q/6p1/R6p/K1p2k1b/4N3/2BP1p1N/8/3Q2R1

#2

8 + 8

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bg4
      • 2.Sg3#
    • 1...Bg6
      • 2.Qxf3#
    • 1...Bf7
      • 2.Qxf3#
    • 1...Be8
      • 2.Qxf3#
    • 1...Se6
      • 2.Sd6#
    • 1...f2
      • 2.Sg3#
  • Tries
    • 1.Qb3?
      • threat
        • 2.Sd6#
        • 2.Qd5#
      • 1...Qg8
        • 2.Sd6#
      • 1...Bg4
        • 2.Sg3#
        • 2.Qd5#
        • 2.Qf7#
      • 1...Bf7
        • 2.Sd6#
        • 2.Qxf7#
      • 1...Sg6
        • 2.Sd6#
        • 2.Qe6#
        • 2.Qf7#
      • 1...Sd7
        • 2.Sd6#
        • 2.Qe6#
      • 1...c4
        • 2.Qb5#
      • 1...g6
        • 2.Sd6#
      • 1...g5!
    • 1.Qe1?
      • threat
        • 2.Sd6#
      • 1...Bg4
        • 2.Sg3#
      • 1...g5!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Sg3#
      • 1...Se6
        • 2.Sd6#
      • 1...c4
        • 2.Qb5#

There are these versions: 37475

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • B(d);SBLOCK::S(F)
    • B(d);N_GUARD::QAR2(A),XP(a)
    • S(g);SBLOCK::S(F)
    • P(a);::S(F)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(h);::S(F)
        • P(b);OGATEB::QAR(A)
        • P(f);::S(F)
      • Refutation
        • P(f);
    • Try
      • Q(A);
      • Threat
        • S(F)
      • Vars
        • B(d);SBLOCK::S(F)
      • Refutation
        • P(f);
  • Actual
    • Q(A);
    • Threat
      • S(F)
    • Vars
      • S(g);SBLOCK::S(F)
      • P(b);OGATEB::QAR(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).