MESON Chess Problem Database

Problem Display
PID: 141196 (1b4KB/7n/3pN1p1/1P1k2p1/4N1Q1/1b1B4/8/1n6 w - - 0 1)

Dobbs, Gilbert S

4th Prize, Western Daily Mercury, 1905

1b4KB/7n/3pN1p1/1P1k2p1/4N1Q1/1b1B4/8/1n6

#2

7 + 8

14868 Pirnie Collection 2011
5454 Near Snap 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Ba7
      • 2.Sc7#
    • 1...Bc7
      • 2.Sxc7#
    • 1...Sd2
      • 2.Sc3#
    • 1...Sa3
      • 2.Sc3#
    • 1...Sc3
      • 2.Sxc3#
  • Tries
    • 1.Sf6+?
      • 1...Ke5
        • 2.Qe2#
        • 2.Qe4#
      • 1...Sxf6+!
    • 1.Sd4?
      • threat
        • 2.Qe6#
      • 1...Sf8
        • 2.Qxg5#
      • 1...Sf6+!
    • 1.Sd8?
      • threat
        • 2.Qe6#
      • 1...Sf8
        • 2.Qxg5#
      • 1...Sf6+!
    • 1.Bxb1?
      • threat
        • 2.Sc3#
      • 1...Kc4
        • 2.Sc3#
      • 1...Sf6+!
    • 1.Qxg5+?
      • 1...Sxg5
        • 2.Sf4#
      • 1...Kxe6!
  • Keys
    • 1.Qe2!
      • 1...Sf6+
        • 2.Sxf6#
      • 1...Kxe6
        • 2.Sf6#
      • 1...Bd1
        • 2.Bc4#
      • 1...Ba2
        • 2.Qxa2#
      • 1...Bc2
        • 2.Bc4#
      • 1...Ba4
        • 2.Bc4#
      • 1...Bc4
        • 2.Bxc4#
      • 1...Ba7
        • 2.Sc7#
      • 1...Bc7
        • 2.Sxc7#
      • 1...Sd2
        • 2.Sc3#
      • 1...Sa3
        • 2.Sc3#
      • 1...Sc3
        • 2.Sxc3#
      • 1...Sf8
        • 2.Sf6#
      • 1...g4
        • 2.Sf4#

This anticipates 193821(1916)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • B(h);N_GUARD::S(E)
    • B(h);N_GUARD::S(E),XB(h)
    • S(a);N_GUARD::S(B)
    • S(a);N_GUARD::S(B),XS(a)
  • Tries
    • Try
      • S(B);CHECK
      • Refutation
        • S(g);CHECK,XS(B)
    • Try
      • S(E);
      • Threat
        • QAB1(C)
      • Vars
        • S(g);N_GUARD::QAR(C),XP(d)
      • Refutation
        • S(g);CHECK
    • Try
      • S(E);
      • Threat
        • QAB1(C)
      • Vars
        • S(g);N_GUARD::QAR(C),XP(d)
      • Refutation
        • S(g);CHECK
    • Try
      • B(A);XS(a)
      • Threat
        • S(B)
      • Vars
        • K(c);S_FLIGHT::QAR(C)+S(B)
      • Refutation
        • S(g);CHECK
    • Try
      • Q(C);CHECK,XP(d)
      • Vars
        • S(g);XQ(C)::S(E)
      • Refutation
        • K(c);S_FLIGHT,XS(E)
  • Actual
    • Q(C);
    • Vars
      • S(g);CHECK,N_GUARD::S(B),XS(g)
      • K(c);S_FLIGHT,XS(E)::QAR(C)+S(B)
      • B(b);N_GUARD::B(A)
      • B(b);OGATEB::QAB(C),XB(b)
      • B(b);N_GUARD::B(A),XB(b)
      • B(h);N_GUARD::S(E)
      • B(h);N_GUARD::S(E),XB(h)
      • S(a);N_GUARD::S(B)
      • S(a);N_GUARD::S(B),XS(a)
      • S(g);N_GUARD::S(B)
      • P(d);N_GUARD::S(E)
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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).