MESON Chess Problem Database

Problem Display
PID: 1120 (8/3p4/P2P2N1/1pBkNp1Q/1P6/3b4/1K5P/3R4 w - - 0 1)

Pierce, William Timbrell

The Westminster Papers, 1873

8/3p4/P2P2N1/1pBkNp1Q/1P6/3b4/1K5P/3R4

#2

10 + 5

3501 Chess Problems by Pierces 1873
1693 English Chess Problems 1876
5454 Near Snap 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qf3#
  • Tries
    • 1.Sxd3?
      • 1...Kc4
        • 2.Sde5#
      • 1...Ke4
        • 2.Sf2#
      • 1...Kc6
        • 2.Sde5#
        • 2.Se7#
        • 2.Qf3#
      • 1...Ke6!
    • 1.Rxd3+?
      • 1...Ke4
        • 2.Qe2#
        • 2.Qf3#
      • 1...Ke6!
    • 1.Qe2?
      • threat
        • 2.Sf4#
      • 1...f4
        • 2.Sxf4#
      • 1...Ke6!
    • 1.Qh8?
      • 1...Ke4
        • 2.Qa8#
      • 1...Ke6
        • 2.Sf4#
      • 1...f4!
  • Keys
    • 1.Sg4!
      • 1...Kc4
        • 2.Se3#
      • 1...Ke4
        • 2.Sf6#
      • 1...Kc6
        • 2.Se7#
      • 1...Ke6
        • 2.Sf4#

This anticipates 154475(1987)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(c);N_SPINB(a),S_FLIGHT::QAB1(G)
  • Tries
    • Try
      • S(F);P_PINP(d),XB(a)
      • Vars
        • K(c);N_SPINP(d),S_FLIGHT::S(F)
      • Refutation
        • K(c);N_SPINP(d),S_FLIGHT
    • Try
      • R(A);CHECK,XB(a)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(G);
      • Threat
        • S(J)
      • Vars
        • P(d);::S(J),XP(d)
      • Refutation
        • K(c);N_SPINB(a),S_FLIGHT
    • Try
      • Q(G);
      • Vars
        • K(c);N_SPINB(a),S_FLIGHT::QAB(G)
        • K(c);N_SPINB(a),S_FLIGHT::S(J)
      • Refutation
        • P(d);
  • Actual
    • S(F);P_PINP(d)
    • Vars
      • K(c);N_SPINB(a),N_SPINP(d),S_FLIGHT::S(F)
      • K(c);N_SPINB(a),N_SPINP(d),S_FLIGHT::S(J)
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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).