MESON Chess Problem Database

Problem Display
PID: 247654 (qr6/6b1/8/4pBBK/p1p4p/RP1b3r/1pk1P1R1/4Q3 w - - 0 1)

Westbury, Eric Ernest

British Chess Magazine, 1932

qr6/6b1/8/4pBBK/p1p4p/RP1b3r/1pk1P1R1/4Q3

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qf3+
      • 2.exf3#
    • 1...Qa6
      • 2.exd3#
      • 2.e3#
    • 1...Qa7
      • 2.e3#
    • 1...Rf3
      • 2.exf3#
    • 1...Rb7
      • 2.exd3#
      • 2.e3#
    • 1...b1Q
      • 2.Qd2#
    • 1...b1S
      • 2.Qc1#
    • 1...b1B
      • 2.Qd2#
      • 2.Qc1#
    • 1...b1R
      • 2.Qd2#
  • Tries
    • 1.Qc3+?
      • 1...Kb1
        • 2.Rg1#
      • 1...Kd1
        • 2.Qd2#
      • 1...Kxc3!
    • 1.b4?
      • threat
        • 2.Rc3#
      • 1...Qf3+
        • 2.exf3#
      • 1...Bxf5
        • 2.e4#
      • 1...b1Q
        • 2.Qd2#
      • 1...b1S
        • 2.Qc1#
      • 1...b1B
        • 2.Qd2#
        • 2.Qc1#
      • 1...b1R
        • 2.Qd2#
      • 1...Be4
        • 2.e3#
      • 1...c3
        • 2.Rxc3#
      • 1...e4
        • 2.exd3#
      • 1...Rh8+!
  • Keys
    • 1.Qd2+!
      • 1...Kb1
        • 2.Rg1#
        • 2.Qd1#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 6
  • Sets
    • Q(j);CHECK,OGATE::R(C)+P(B),XQ(j)
    • Q(j);N_GUARD::R(C)+P(B)
    • R(d);OGATE::R(C)+P(B),XR(d)
    • P(a);SBLOCK::QAR1(A)
    • P(a);N_GUARD::QAR1(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::R(C)
        • K(b);N_SPINB(c),S_FLIGHT::QAR1(A)
      • Refutation
        • K(b);N_SPINB(c),P-FLIGHT,XQ(A)
    • Try
      • P(E);
      • Threat
        • R1(D)
      • Vars
        • Q(j);CHECK,OGATE::R(C)+P(B),XQ(j)
        • B(c);N_GUARD,N_SPINB(c),XB(F)::R(C)+P(B)
        • P(a);SBLOCK::QAR1(A)
        • P(a);N_GUARD::QAR1(A)
        • B(c);S_CUTQ(j)::R(C)+P(B)
        • P(f);::R1(D),XP(f)
        • P(h);N_SPINB(c),S_CUTQ(j)::R(C)+P(B),XB(c)
      • Refutation
        • R(k);CHECK
  • Actual
    • Q(A);CHECK
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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).