MESON Chess Problem Database

Problem Display
PID: 152480 (qb6/7b/1p4p1/2B1p1K1/B3k3/1P1R4/1N3p2/Qn6 w - - 0 1)

Ross, David

Hampstead and Highgate Express, 1898

(First published on Sat Aug 27 1898)

qb6/7b/1p4p1/2B1p1K1/B3k3/1P1R4/1N3p2/Qn6

#2

7 + 9

14867 BCPS Library 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5
      • 2.Re3#
    • 1...Qc6
      • 2.Bxc6#
    • 1...Qxa4
      • 2.Qxa4#
    • 1...Qa5
      • 2.Bc6#
    • 1...Qa6
      • 2.Bc6#
    • 1...Qa7
      • 2.Bc6#
    • 1...Sa3
      • 2.Qh1#
    • 1...Sc3
      • 2.Qh1#
  • Tries
    • 1.Bb5?
      • threat
        • 2.Qxa8#
      • 1...Qxa1
        • 2.Bc6#
      • 1...Qd5
        • 2.Re3#
      • 1...Qc6
        • 2.Bxc6#
        • 2.Qa4#
      • 1...Qb7
        • 2.Qa4#
      • 1...Qa2
        • 2.Bc6#
      • 1...Qa3
        • 2.Bc6#
      • 1...Qa4
        • 2.Qxa4#
      • 1...Qa5
        • 2.Bc6#
      • 1...Qa6
        • 2.Bc6#
      • 1...Qa7
        • 2.Bc6#
      • 1...Ba7
        • 2.Qa4#
      • 1...Sa3
        • 2.Qh1#
      • 1...Sc3
        • 2.Qh1#
      • 1...Bg8!
    • 1.Bd7?
      • threat
        • 2.Qxa8#
      • 1...Qxa1
        • 2.Bc6#
      • 1...Qd5
        • 2.Re3#
      • 1...Qc6
        • 2.Bxc6#
      • 1...Qb7
        • 2.Qa4#
      • 1...Qa2
        • 2.Bc6#
      • 1...Qa3
        • 2.Bc6#
      • 1...Qa4
        • 2.Qxa4#
      • 1...Qa5
        • 2.Bc6#
      • 1...Qa6
        • 2.Bc6#
      • 1...Qa7
        • 2.Bc6#
      • 1...Ba7
        • 2.Qa4#
      • 1...Sa3
        • 2.Qh1#
      • 1...Sc3
        • 2.Qh1#
      • 1...Bg8!
  • Keys
    • 1.Be8!
      • threat
        • 2.Qxa8#
      • 1...Qxa1
        • 2.Bc6#
      • 1...Qd5
        • 2.Re3#
      • 1...Qc6
        • 2.Bxc6#
      • 1...Qb7
        • 2.Qa4#
      • 1...Qa2
        • 2.Bc6#
      • 1...Qa3
        • 2.Bc6#
      • 1...Qa4
        • 2.Qxa4#
      • 1...Qa5
        • 2.Bc6#
      • 1...Qa6
        • 2.Bc6#
      • 1...Qa7
        • 2.Bc6#
      • 1...Bg8
        • 2.Bxg6#
      • 1...Ba7
        • 2.Qa4#
      • 1...Sa3
        • 2.Qh1#
      • 1...Sc3
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • Q(h);SBLOCK::R1(D)
    • Q(h);N_GUARD::B(E),XQ(h)
    • Q(h);OGATE,XB(E)::QAR(A),XQ(h)
    • Q(h);N_GUARD::B(E)
    • S(a);OGATE::QAB(A)
  • Tries
    • Try
      • B(E);
      • Threat
        • QAB(A),XQ(h)
      • Vars
        • Q(h);N_GUARD,XQ(A)::B(E)
        • Q(h);SBLOCK::R1(D)
        • Q(h);N_GUARD::QAR(A)
        • Q(h);N_GUARD::B(E)
        • Q(h);N_GUARD::QAR(A),XQ(h)
        • B(i);S_CUTQ(h)::QAR(A)
        • S(a);OGATE::QAB(A)
      • Refutation
        • B(g);
    • Try
      • B(E);
      • Threat
        • QAB(A),XQ(h)
      • Vars
        • Q(h);N_GUARD,XQ(A)::B(E)
        • Q(h);SBLOCK::R1(D)
        • Q(h);N_GUARD::B(E),XQ(h)
        • Q(h);N_GUARD::QAR(A)
        • Q(h);N_GUARD::B(E)
        • Q(h);N_GUARD::QAR(A),XQ(h)
        • B(i);S_CUTQ(h)::QAR(A)
        • S(a);OGATE::QAB(A)
      • Refutation
        • B(g);
  • Actual
    • B(E);
    • Threat
      • QAB(A),XQ(h)
    • Vars
      • Q(h);N_GUARD,XQ(A)::B(E)
      • Q(h);SBLOCK::R1(D)
      • Q(h);N_GUARD::B(E),XQ(h)
      • Q(h);N_GUARD::QAR(A)
      • Q(h);N_GUARD::B(E)
      • Q(h);N_GUARD::QAR(A),XQ(h)
      • B(g);N_GUARD::B(E),XP(f)
      • B(i);S_CUTQ(h)::QAR(A)
      • S(a);OGATE::QAB(A)
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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).