MESON Chess Problem Database

Problem Display
PID: 102068 (8/1p5p/1B1PNP1P/p3k1NK/B3P3/1P3p2/1P3P2/8 w - - 0 1)

Kish, Alexander

The Observer, 1936

(First published on Sun Nov 29 1936)

8/1p5p/1B1PNP1P/p3k1NK/B3P3/1P3p2/1P3P2/8

#2

12 + 5

6490 yacpdb 2009
3713 Snap 2011
15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd6
      • 2.Bc7#
    • 1...Kxf6
      • 2.Bd4#
  • Tries
    • 1.Kg4?
      • 1...Kxd6
        • 2.Bc7#
      • 1...Kxf6!
    • 1.Kh4?
      • 1...Kxd6
        • 2.Bc7#
      • 1...Kxf6!
    • 1.Sf4?
      • 1...Kxd6
        • 2.Sf7#
      • 1...Kxf6
        • 2.Bd4#
      • 1...Kxf4!
    • 1.Sc7?
      • 1...Kxd6
        • 2.Sf7#
      • 1...Kxf6
        • 2.Bd4#
      • 1...Kf4!
    • 1.Sg7?
      • 1...Kxd6
        • 2.Sf7#
      • 1...Kxf6
        • 2.Bd4#
      • 1...Kf4!
    • 1.Sd8?
      • 1...Kxd6
        • 2.Sgf7#
        • 2.Sdf7#
      • 1...Kxf6
        • 2.Bd4#
      • 1...Kf4!
    • 1.Sf8?
      • 1...Kxd6
        • 2.Sf7#
      • 1...Kxf6
        • 2.Sd7#
        • 2.Bd4#
      • 1...Kf4!
    • 1.Bb5?
      • 1...Kxd6
        • 2.Bc7#
      • 1...Kxf6
        • 2.Bd4#
      • 1...a4!
    • 1.Be8?
      • 1...Kxd6
        • 2.Bc7#
      • 1...Kxf6
        • 2.Bd4#
      • 1...a4!
    • 1.b4?
      • 1...Kxd6
        • 2.Bc7#
      • 1...Kxf6
        • 2.Bd4#
      • 1...axb4!
    • 1.d7?
      • 1...Kd6
        • 2.Bc7#
      • 1...Kxf6!
    • 1.f7?
      • 1...Kf6
        • 2.Bd4#
      • 1...Kxd6!
  • Keys
    • 1.Sc5!
      • 1...Kd4
        • 2.Sxf3#
      • 1...Kf4
        • 2.Sd3#
      • 1...Kxd6
        • 2.Sf7#
      • 1...Kxf6
        • 2.Sd7#

This anticipates 138080(1947)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(c);OGATEB,S_FLIGHT,XP(I)::B(H)
    • K(c);S_FLIGHT,XP(K)::B(H)
  • Tries
    • Try
      • K(G);S_FLIGHT
      • Vars
        • K(c);OGATEB,S_FLIGHT,XP(I)::B(H)
      • Refutation
        • K(c);S_FLIGHT,XP(K)
    • Try
      • K(G);P-FLIGHT
      • Vars
        • K(c);OGATEB,S_FLIGHT,XP(I)::B(H)
      • Refutation
        • K(c);S_FLIGHT,XP(K)
    • Try
      • S(J);
      • Vars
        • K(c);S_FLIGHT,XP(I)::S(F)
        • K(c);S_FLIGHT,XP(K)::B(H)
      • Refutation
        • K(c);S_FLIGHT,XS(J)
    • Try
      • S(J);
      • Vars
        • K(c);S_FLIGHT,XP(I)::S(F)
        • K(c);S_FLIGHT,XP(K)::B(H)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(J);
      • Vars
        • K(c);S_FLIGHT,XP(I)::S(F)
        • K(c);S_FLIGHT,XP(K)::B(H)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(J);
      • Vars
        • K(c);S_FLIGHT,XP(K)::B(H)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(J);
      • Vars
        • K(c);S_FLIGHT,XP(I)::S(F)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • B(D);
      • Vars
        • K(c);OGATEB,S_FLIGHT,XP(I)::B(H)
        • K(c);S_FLIGHT,XP(K)::B(H)
      • Refutation
        • P(b);
    • Try
      • B(D);
      • Vars
        • K(c);OGATEB,S_FLIGHT,XP(I)::B(H)
        • K(c);S_FLIGHT,XP(K)::B(H)
      • Refutation
        • P(b);
    • Try
      • P(C);
      • Vars
        • K(c);OGATEB,S_FLIGHT,XP(I)::B(H)
        • K(c);S_FLIGHT,XP(K)::B(H)
      • Refutation
        • P(b);XP(C)
    • Try
      • P(I);
      • Vars
        • K(c);S_FLIGHT::B(H)
      • Refutation
        • K(c);S_FLIGHT,XP(K)
    • Try
      • P(K);
      • Vars
        • K(c);S_FLIGHT::B(H)
      • Refutation
        • K(c);S_FLIGHT,XP(I)
  • Actual
    • S(J);
    • Vars
      • K(c);S_FLIGHT::S(F),XP(a)
      • K(c);S_FLIGHT::S(J)
      • K(c);S_FLIGHT,XP(I)::S(F)
      • K(c);S_FLIGHT,XP(K)::S(J)
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).