MESON Chess Problem Database

Problem Display
PID: 92797 (bn1b1B1K/r5p1/1N1PPk2/p1QB1P2/3P3P/4N3/7n/6rq w - - 0 1)

Keller, Michael

Schach-Echo, 1966

bn1b1B1K/r5p1/1N1PPk2/p1QB1P2/3P3P/4N3/7n/6rq

#2

11 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bc7
      • 2.Be7#
  • Tries
    • 1.Bb7?
      • threat
        • 2.Qe5#
      • 1...Sg4
        • 2.Bxg7#
      • 1...Qd5
        • 2.Sbxd5#
      • 1...Sf3
        • 2.Sbd5#
      • 1...Sc6
        • 2.Sd7#
      • 1...Sd7
        • 2.Sxd7#
      • 1...Qe4!
  • Keys
    • 1.Bg2!
      • threat
        • 2.Qe5#
      • 1...Bd5
        • 2.Sbxd5#
      • 1...Sf3
        • 2.Sg4#
      • 1...Sg4
        • 2.Sxg4#
      • 1...Sc6
        • 2.Sbd5#
      • 1...Sd7
        • 2.Bxg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • B(j);N_GUARD,S_CUTR(f)::B(J)
  • Tries
    • Try
      • B(E);
      • Threat
        • QAB1(D)
      • Vars
        • S(c);P_PINP(C),S_CUTR(a)::B(J),XP(g)
        • Q(b);N_GUARD::S(G),XQ(b)
        • S(c);P_PINP(C),S_CUTQ(b)::S(G)
        • S(i);N_GUARD::S(G)
        • S(i);N_GUARD::S(G),XS(i)
      • Refutation
        • Q(b);
  • Actual
    • B(E);
    • Threat
      • QAB1(D)
    • Vars
      • B(h);N_GUARD::S(G),XB(h)
      • S(c);N_GUARD,P_PINP(C)::S(A)
      • S(c);N_GUARD,P_PINP(C)::S(A),XS(c)
      • S(i);S_CUTB(h)::S(G)
      • S(i);S_CUTR(f)::B(J),XP(g)
HTML5 logo

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).