MESON Chess Problem Database

Problem Display
PID: 176529 (2B5/2p3NN/R2p4/4p3/2n2p1k/1QB3p1/8/6K1 w - - 0 1)

Mertes, Helmut

Schach-Echo, 1965

2B5/2p3NN/R2p4/4p3/2n2p1k/1QB3p1/8/6K1

#2

7 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...g2
      • 2.Be1#
    • 1...e4
      • 2.Bf6#
    • 1...d5
      • 2.Rh6#
  • Tries
    • 1.Bxe5?
      • threat
        • 2.Bf6#
      • 1...dxe5
        • 2.Rh6#
      • 1...Sxe5!
    • 1.Qd1?
      • threat
        • 2.Qg4#
        • 2.Qh5#
      • 1...g2
        • 2.Be1#
        • 2.Qg4#
        • 2.Qe1#
      • 1...Se3
        • 2.Qh5#
      • 1...f3!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Qh1#
      • 1...g2
        • 2.Be1#
      • 1...f3
        • 2.Qe4#
      • 1...e4
        • 2.Bf6#
      • 1...d5
        • 2.Rh6#
      • 1...c6
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATEB::B(C)
    • P(e);OGATE::B(C)
    • P(f);OGATE::R(D)
  • Tries
    • Try
      • B(C);XP(e)
      • Threat
        • B(C)
      • Vars
        • P(f);OGATE,XB(C)::R(D)
      • Refutation
        • S(b);XB(C)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);::QAR1(B)
      • Refutation
        • P(c);
  • Actual
    • Q(B);
    • Threat
      • QAR(B)
    • Vars
      • P(a);OGATEB::B(C)
      • P(c);OGATEB::QAR(B)
      • P(e);OGATE::B(C)
      • P(f);OGATE::R(D)
      • P(g);OGATE::QAB(B)
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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).