MESON Chess Problem Database

Problem Display
PID: 146633 (6N1/1p4p1/3KNp2/4p3/2p1k1P1/3p1p2/4p2B/Q7 w - - 0 1)

Weiss, Berthold

Good Companions (February), 1918

6N1/1p4p1/3KNp2/4p3/2p1k1P1/3p1p2/4p2B/Q7

#2

6 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...e1Q
      • 2.Qxe1#
    • 1...e1S
      • 2.Qxe1#
    • 1...e1B
      • 2.Qxe1#
    • 1...e1R
      • 2.Qxe1#
    • 1...f5
      • 2.Qxe5#
  • Tries
    • 1.Sg5+?
      • 1...fxg5
        • 2.Qxe5#
      • 1...Ke3!
    • 1.Bg1?
      • 1...d2
        • 2.Qb1#
      • 1...e1Q
        • 2.Qxe1#
      • 1...e1S
        • 2.Qxe1#
      • 1...e1B
        • 2.Qxe1#
      • 1...e1R
        • 2.Qxe1#
      • 1...c3
        • 2.Qa4#
      • 1...f5
        • 2.Qxe5#
      • 1...b5
        • 2.Qa8#
      • 1...b6
        • 2.Qa8#
      • 1...g5
        • 2.Sxf6#
      • 1...g6
        • 2.Sxf6#
      • 1...f2!
  • Keys
    • 1.Bf4!
      • 1...exf4
        • 2.Qd4#
      • 1...d2
        • 2.Qb1#
      • 1...f2
        • 2.Qh1#
      • 1...e1Q
        • 2.Qxe1#
      • 1...e1S
        • 2.Qxe1#
      • 1...e1B
        • 2.Qxe1#
      • 1...e1R
        • 2.Qxe1#
      • 1...c3
        • 2.Qa4#
      • 1...f5
        • 2.Qxe5#
      • 1...b5
        • 2.Qa8#
      • 1...b6
        • 2.Qa8#
      • 1...g5
        • 2.Sxf6#
      • 1...g6
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATEB::QAR(A),XQ(a)
    • P(a);OGATEB::QAR(A),XS(a)
    • P(a);OGATEB::QAR(A),XB(a)
    • P(a);OGATEB::QAR(A),XR(a)
    • P(g);N_GUARD::QAR1(A),XP(f)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • P(g);XS(E)::QAR1(A),XP(f)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • B(B);
      • Vars
        • P(b);OGATEB::QAB(A)
        • P(a);OGATEB::QAR(A),XQ(a)
        • P(a);OGATEB::QAR(A),XS(a)
        • P(a);OGATEB::QAR(A),XB(a)
        • P(a);OGATEB::QAR(A),XR(a)
        • P(d);OGATEB::QAR(A)
        • P(g);N_GUARD::QAR1(A),XP(f)
        • P(h);OGATEB::QAB(A)
        • P(i);N_GUARD::S(F),XP(g)
      • Refutation
        • P(c);
  • Actual
    • B(B);
    • Vars
      • P(f);N_GUARD,XB(B)::QAR1(A)
      • P(b);OGATEB::QAB(A)
      • P(c);OGATEB::QAB(A)
      • P(a);OGATEB::QAR(A),XQ(a)
      • P(a);OGATEB::QAR(A),XS(a)
      • P(a);OGATEB::QAR(A),XB(a)
      • P(a);OGATEB::QAR(A),XR(a)
      • P(d);OGATEB::QAR(A)
      • P(g);N_GUARD::QAR1(A),XP(f)
      • P(h);OGATEB::QAB(A)
      • P(i);N_GUARD::S(F),XP(g)
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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).