MESON Chess Problem Database

Problem Display
PID: 2288 (2nB4/r3q3/N3pN2/4kp2/3R1R2/7B/4b2K/6Q1 w - - 0 1)

Courtenay, Edward H

Source?, 0000

2nB4/r3q3/N3pN2/4kp2/3R1R2/7B/4b2K/6Q1

#2

8 + 7

1679 American Chess Nuts 1868

SOLUTION

  • SOUND
  • Sets
    • 1...Qb4
      • 2.Qe3#
    • 1...Qc5
      • 2.Qe3#
    • 1...Qd6
      • 2.Qe3#
    • 1...Qxf6
      • 2.Qe3#
    • 1...Qf8
      • 2.Qe3#
    • 1...Qc7
      • 2.Qe3#
    • 1...Qd7
      • 2.Qe3#
    • 1...Qf7
      • 2.Qe3#
    • 1...Qg7
      • 2.Qe3#
    • 1...Qh7
      • 2.Qe3#
    • 1...Qe8
      • 2.Qe3#
  • Tries
    • 1.Sg4+?
      • 1...fxg4
        • 2.Qe3#
      • 1...Bxg4!
    • 1.Sd7+?
      • 1...Qxd7
        • 2.Qe3#
      • 1...Rxd7!
    • 1.Qg7?
      • threat
        • 2.Sg4#
        • 2.Sd7#
      • 1...Qxf6
        • 2.Bxf6#
        • 2.Qxf6#
      • 1...Qd7
        • 2.Sg4#
        • 2.Sxd7#
      • 1...Rd7
        • 2.Sg4#
        • 2.Sxd7#
      • 1...Bg4
        • 2.Sxg4#
        • 2.Sd7#
      • 1...Qxg7!
  • Keys
    • 1.Rd6!
      • threat
        • 2.Qd4#
      • 1...Kxf4
        • 2.Qg3#
      • 1...Kxd6
        • 2.Qc5#
      • 1...Kxf6
        • 2.Rxf5#
      • 1...Qxd6
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 10
  • Sets
    • Q(f);::QAR2(A)
    • Q(f);XS(G)::QAR2(A)
    • Q(f);P_PINB(C)::QAR2(A)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • P(c);XS(G)::QAR2(A)
      • Refutation
        • B(a);XS(G)
    • Try
      • S(G);CHECK
      • Vars
        • Q(f);XS(G)::QAR2(A)
      • Refutation
        • R(e);XS(G)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Refutation
        • Q(f);XQ(A)
  • Actual
    • R(D);
    • Threat
      • QAB1(A)
    • Vars
      • K(b);OGATEB,S_FLIGHT,XR(E)::QAB1(A)
      • K(b);S_FLIGHT,XR(D)::QAB1(A)
      • K(b);P_SPINP(c),P_SPINQ(f),S_FLIGHT,XS(G)::R1(E),XP(c)
      • Q(f);SBLOCK,XR(D)::QAR2(A)
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).