MESON Chess Problem Database

Problem Display
PID: 120065 (Q5b1/8/5K2/2p3P1/1NN1p3/P2B4/8/k7 w - - 0 1)

Burmeister, Albert M

Baltische Tageszeitung, 1905

Q5b1/8/5K2/2p3P1/1NN1p3/P2B4/8/k7

#2

7 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...exd3
      • 2.Qh1#
    • 1...e3
      • 2.Qh1#
    • 1...cxb4
      • 2.axb4#
  • Tries
    • 1.Qxe4?
      • threat
        • 2.Qh1#
        • 2.Qe1#
        • 2.Qe5#
      • 1...Bxc4
        • 2.Qe5#
      • 1...Bd5
        • 2.Qe1#
        • 2.Qe5#
      • 1...cxb4!
    • 1.Qa4?
      • threat
        • 2.Qd1#
      • 1...cxb4
        • 2.axb4#
      • 1...Bxc4!
  • Keys
    • 1.Ke7!
      • 1...Bxc4
        • 2.Qh8#
      • 1...exd3
        • 2.Qh1#
      • 1...cxb4
        • 2.axb4#
      • 1...Bd5
        • 2.Qh8#
      • 1...Be6
        • 2.Qh8#
      • 1...Bf7
        • 2.Qh8#
      • 1...Bh7
        • 2.Qh8#
      • 1...e3
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATE,XB(B)::QAB1(G)
    • P(b);OGATE::QAB1(G)
    • P(c);OGATE,XS(C)::QAR(G)+P(A),XP(c)
  • Tries
    • Try
      • Q(G);XP(b)
      • Threat
        • DUALS(3)
      • Vars
        • B(d);XS(D)::QAB(G)
      • Refutation
        • P(c);XS(C)
    • Try
      • Q(G);
      • Threat
        • QAR(G)
      • Vars
        • P(c);OGATE,XS(C)::QAR(G)+P(A),XP(c)
      • Refutation
        • B(d);XS(D)
  • Actual
    • K(F);S_FLIGHT
    • Vars
      • B(d);OGATE,XS(D)::QAB(G)
      • P(b);OGATE,XB(B)::QAB1(G)
      • P(c);OGATE,XS(C)::QAR(G)+P(A),XP(c)
      • B(d);OGATE::QAB(G)
      • P(b);OGATE::QAB1(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).