MESON Chess Problem Database

Problem Display
PID: 152251 (8/4p3/1BBb4/3P1p2/7K/8/3Q1pkp/R6n w - - 0 1)

Jones, JJ

Pen & Pencil, 1888

(First published on Sat Aug 25 1888)

8/4p3/1BBb4/3P1p2/7K/8/3Q1pkp/R6n

#2

6 + 7

15239 Valois Notebooks 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Ba3
      • 2.d6#
    • 1...Bb4
      • 2.d6#
    • 1...Bf4
      • 2.d6#
    • 1...Bc5
      • 2.d6#
    • 1...Be5
      • 2.d6#
    • 1...Bc7
      • 2.d6#
    • 1...Bb8
      • 2.d6#
    • 1...Sg3
      • 2.Qxf2#
    • 1...e5
      • 2.dxe5 ep#
    • 1...e6
      • 2.dxe6#
  • Tries
    • 1.Qe3?
      • threat
        • 2.Qh3#
      • 1...Sg3
        • 2.Qxf2#
      • 1...Bg3+!
  • Keys
    • 1.Qf4!
      • 1...Bxf4
        • 2.d6#
      • 1...f1Q
        • 2.Qxf1#
      • 1...f1S
        • 2.Qxf1#
      • 1...f1B
        • 2.Qxf1#
      • 1...f1R
        • 2.Qxf1#
      • 1...Ba3
        • 2.d6#
      • 1...Bb4
        • 2.d6#
      • 1...Bc5
        • 2.d6#
      • 1...Be5
        • 2.d6#
      • 1...Bc7
        • 2.d6#
      • 1...Bb8
        • 2.d6#
      • 1...Sg3
        • 2.Qxf2#
      • 1...e5
        • 2.dxe5 ep#
      • 1...e6
        • 2.dxe6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(f);OGATE::B(F)+P(D)
    • S(a);N_GUARD::QAR1(B),XP(b)
    • P(g);OGATE::B(F)+P(D),XP(g),EP
    • P(g);OGATE::B(F)+P(D),XP(g)
  • Tries
    • Try
      • Q(B);N_PINP(b)
      • Threat
        • QAB1(B)
      • Vars
        • S(a);N_GUARD::QAR1(B),XP(b)
      • Refutation
        • B(f);CHECK
  • Actual
    • Q(B);N_PINP(b)
    • Vars
      • B(f);OGATE,XQ(B)::B(F)+P(D)
      • P(b);OGATE::QAB1(B),XQ(b)
      • P(b);OGATE::QAB1(B),XS(b)
      • P(b);OGATE::QAB1(B),XB(b)
      • P(b);OGATE::QAB1(B),XR(b)
      • B(f);OGATE::B(F)+P(D)
      • S(a);N_GUARD::QAR1(B),XP(b)
      • P(g);OGATE::B(F)+P(D),XP(g),EP
      • P(g);OGATE::B(F)+P(D),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).