MESON Chess Problem Database

Problem Display
PID: 156236 (1nRB4/8/1ppp4/bPkN4/5p2/p2Q1P2/P2p4/3K4 w - - 0 1)

Packer, GFH

Hull Times, 1917

(First published on Sun Aug 26 1917)

1nRB4/8/1ppp4/bPkN4/5p2/p2Q1P2/P2p4/3K4

#2

8 + 9

15351 SCPF/BCPS Black Books 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Bc3
      • 2.Bxb6#
    • 1...Bb4
      • 2.Bxb6#
    • 1...Sa6
      • 2.Rxc6#
    • 1...Sd7
      • 2.Rxc6#
  • Tries
    • 1.Se3?
      • threat
        • 2.Qc4#
      • 1...Kb4
        • 2.Qc4#
      • 1...d5
        • 2.Be7#
      • 1...fxe3!
    • 1.Rxb8?
      • 1...cxb5
        • 2.Rc8#
      • 1...Bc3
        • 2.Bxb6#
      • 1...Bb4
        • 2.Bxb6#
      • 1...cxd5!
    • 1.Qd4+?
      • 1...Kxb5
        • 2.Sc7#
      • 1...Kxd4!
  • Keys
    • 1.Sc7!
      • 1...Kb4
        • 2.Qd4#
      • 1...cxb5
        • 2.Sa6#
      • 1...d5
        • 2.Be7#
      • 1...Bc3
        • 2.Qxc3#
      • 1...Bb4
        • 2.Se6#
      • 1...Sa6
        • 2.Sxa6#
      • 1...Sd7
        • 2.Sa6#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 4
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(d);N_GUARD::B(H),XP(f)
    • S(i);N_GUARD::R1(G),XP(g)
  • Tries
    • Try
      • S(F);
      • Threat
        • QAR1(C)
      • Vars
        • K(e);N_SPINP(g),S_FLIGHT::QAR1(C)
        • P(h);OGATEB::B(H)
      • Refutation
        • P(c);XS(F)
    • Try
      • R(G);N_PINP(g),XS(i)
      • Vars
        • P(g);OGATEB,XP(E)::R(G)
        • B(d);N_GUARD::B(H),XP(f)
      • Refutation
        • P(g);XS(F)
    • Try
      • Q(C);CHECK
      • Vars
        • K(e);N_SPINP(g),P-FLIGHT,XP(E)::S(F)
      • Refutation
        • K(e);N_SPINP(g),S_FLIGHT,XQ(C)
  • Actual
    • S(F);N_PINP(g)
    • Vars
      • K(e);S_FLIGHT::QAR2(C)
      • P(g);XP(E)::R(G)+S(F),DCHECK
      • P(h);OGATEB::B(H)
      • B(d);N_GUARD::QAR2(C),XB(d)
      • B(d);SBLOCK::S(F)
      • S(i);N_GUARD::S(F),XS(i)
      • S(i);N_GUARD::S(F)
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).