MESON Chess Problem Database

Problem Display
PID: 249898 (8/4N3/1K2R3/6p1/1p1k1ppr/1R1B1b2/2PbP1nB/8 w - - 0 1)

Haefele, Hans Frieder

2nd Comm., Deutsche Schachzeitung, 1976

8/4N3/1K2R3/6p1/1p1k1ppr/1R1B1b2/2PbP1nB/8

#2

8 + 9

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe2
      • 2.Re4#
    • 1...Be4
      • 2.Rxe4#
    • 1...Bd5
      • 2.Sf5#
  • Tries
    • 1.c3+?
      • 1...bxc3
        • 2.Rb4#
      • 1...Bxc3!
    • 1.c4?
      • threat
        • 2.Sf5#
      • 1...bxc4 ep
        • 2.Rb4#
      • 1...Be4
        • 2.Rxe4#
      • 1...Se3!
  • Keys
    • 1.e4!
      • threat
        • 2.Sf5#
      • 1...Ke3
        • 2.Bg1#
      • 1...Bxe4
        • 2.Rxe4#
      • 1...fxe4 ep
        • 2.Be5#
      • 1...Se3
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • B(c);N_GUARD,XP(B)::R1(G)
    • B(c);N_GUARD::R1(G),XB(c)
    • B(c);SBLOCK::S(H)
  • Tries
    • Try
      • P(A);CHECK
      • Vars
        • P(d);SBLOCK,XP(A)::R(D)
      • Refutation
        • B(a);XP(A)
    • Try
      • P(A);
      • Threat
        • S(H)
      • Vars
        • P(d);EP,OGATEB,XP(A)::R(D)
        • B(c);N_GUARD::R1(G),XB(c)
      • Refutation
        • S(b);
  • Actual
    • P(B);
    • Threat
      • S(H)
    • Vars
      • K(e);S_CUTB(a),S_CUTS(b),S_FLIGHT::B(C)
      • B(c);OGATE,XP(B)::R1(G),XB(c)
      • P(f);EP,OGATE,XP(B)::B(C)
      • S(b);SBLOCK::S(H)
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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).