MESON Chess Problem Database

Problem Display
PID: 137178 (2n5/2p5/3k1B2/1Q6/7p/7B/K7/8 w - - 0 1)

Kupper, Josef

Schweizerische Schachzeitung, 2005

2n5/2p5/3k1B2/1Q6/7p/7B/K7/8

#2

4 + 4

6490 yacpdb 2010
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Se7
      • 2.Be5#
    • 1...c5
      • 2.Qd7#
    • 1...c6
      • 2.Qe5#
  • Tries
    • 1.Bd7?
      • threat
        • 2.Qc6#
      • 1...c6
        • 2.Qxc6#
      • 1...Se7
        • 2.Be5#
      • 1...Sa7!
    • 1.Bxc8?
      • 1...c5
        • 2.Qd7#
      • 1...c6
        • 2.Qe5#
      • 1...h3!
    • 1.Bd4?
      • threat
        • 2.Qd7#
        • 2.Qc5#
      • 1...c5
        • 2.Qd7#
        • 2.Qxc5#
      • 1...c6
        • 2.Qe5#
      • 1...Sb6
        • 2.Qc5#
      • 1...Ke7!
  • Keys
    • 1.Bg7!
      • 1...Ke7
        • 2.Qd7#
      • 1...c5
        • 2.Qd7#
      • 1...c6
        • 2.Qe5#
      • 1...Sb6
        • 2.Bf8#
      • 1...Sa7
        • 2.Bf8#
      • 1...Se7
        • 2.Be5#

Anticipated by 215325(1926), 73519(1927)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(d);SBLOCK::B(D)
    • P(c);SBLOCK::QAR1(C)
    • P(c);SBLOCK::QAB1(C)
  • Tries
    • Try
      • B(B);
      • Threat
        • QAR1(C)
      • Vars
        • P(c);::QAR1(C),XP(c)
        • S(d);SBLOCK::B(D)
      • Refutation
        • S(d);
    • Try
      • B(B);XS(d)
      • Vars
        • P(c);SBLOCK::QAR1(C)
        • P(c);SBLOCK::QAB1(C)
      • Refutation
        • P(a);
    • Try
      • B(D);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);SBLOCK::QAB1(C)
        • S(d);::QAB1(C)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • B(D);
    • Vars
      • K(b);S_FLIGHT::QAR1(C)
      • P(c);SBLOCK::QAR1(C)
      • P(c);SBLOCK::QAB1(C)
      • S(d);N_GUARD::B(D)
      • S(d);SBLOCK::B(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).