MESON Chess Problem Database

Problem Display
PID: 21988 (b7/1B6/1r3Rp1/1r4p1/1p1PqB1b/1R2Pk1P/2Q5/2K5 w - - 0 1)

Westbury, Eric Ernest

Birmingham Daily Post, 1923

b7/1B6/1r3Rp1/1r4p1/1p1PqB1b/1R2Pk1P/2Q5/2K5

#2

9 + 9

3360 Simple Two-move Themes 1924
2048 Tuxens skakopgaver (Leif C Schmidt) 1984
3770 BCSC Postal 2000-2001
56 The Problemist 2010
14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5
      • 2.Bd6#
    • 1...Qc6
      • 2.Be5#
    • 1...Qxb7
      • 2.e4#
    • 1...gxf4
      • 2.exf4#
  • Tries
    • 1.Bg3+?
      • 1...Rf5
        • 2.Qf2#
      • 1...Rxf6
        • 2.Qf2#
      • 1...Kxg3!
  • Keys
    • 1.Kd1!
      • threat
        • 2.Qe2#
      • 1...Qxb7
        • 2.e4#
      • 1...gxf4
        • 2.exf4#
      • 1...Bf2
        • 2.Qxe4#
      • 1...Qd5
        • 2.Bd6#
      • 1...Qc6
        • 2.Be5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • Q(c);S_CUTR(e)::R(H)+B(G)
    • Q(c);P_PINQ(B),S_CUTR(g)::R(H)+B(G)
    • Q(c);N_SPINQ(c),OGATE,XB(I)::R(C)+P(D)
    • P(f);OGATE,P_SPINP(f),XB(G)::R(C)+P(D),XP(f)
  • Tries
    • Try
      • B(G);CHECK
      • Vars
        • R(e);P_SPINR(e)::QAR1(B)
        • R(g);XR(H)::QAR1(B)
      • Refutation
        • K(a);N_SPINQ(c),P-FLIGHT,XB(G)
  • Actual
    • K(A);P-FLIGHT
    • Threat
      • QAB1(B)
    • Vars
      • Q(c);N_SPINQ(c),OGATE,XB(I)::R(C)+P(D)
      • P(f);OGATE,P_SPINP(f),XB(G)::R(C)+P(D),XP(f)
      • B(d);SBLOCK::QAB1(B),XQ(c)
      • Q(c);P_PINP(F),S_CUTR(e)::R(H)+B(G)
      • Q(c);S_CUTR(g)::R(H)+B(G)
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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).