MESON Chess Problem Database

Problem Display
PID: 196935 (6Bn/Q3b3/8/8/4kNP1/5p1N/3P2n1/1K6 w - - 0 1)

Rosenblatt, Paul

Deutsches Wochenschach, 1919

6Bn/Q3b3/8/8/4kNP1/5p1N/3P2n1/1K6

#2

7 + 5

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Se1
      • 2.Qe3#
    • 1...Se3
      • 2.Qxe3#
    • 1...Sxf4
      • 2.Qe3#
    • 1...Sh4
      • 2.Qe3#
  • Tries
    • 1.Qc5?
      • threat
        • 2.Qd5#
        • 2.d3#
      • 1...Sxf4
        • 2.Sf2#
        • 2.Qe3#
      • 1...f2
        • 2.Qd5#
      • 1...Se1
        • 2.Qe3#
        • 2.Qd5#
      • 1...Se3
        • 2.Qxe3#
        • 2.d3#
      • 1...Bxc5!
    • 1.Qb7+?
      • 1...Kd4
        • 2.Qd5#
      • 1...Ke5!
    • 1.Qa8+?
      • 1...Kd4
        • 2.Qd5#
      • 1...Ke5!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Bd5#
      • 1...Sxf4
        • 2.Sf2#
      • 1...Se3
        • 2.d3#
      • 1...Sf7
        • 2.Bh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • S(a);N_GUARD::QAR1(F)
    • S(a);N_GUARD::QAR1(F),XS(a)
    • S(a);N_GUARD,XS(D)::QAR1(F)
  • Tries
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAB1(F)
      • Refutation
        • B(d);XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(F)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(F)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • Q(F);
    • Threat
      • B(G)
    • Vars
      • S(a);SBLOCK,XS(D)::S(C)
      • S(a);SBLOCK::P(B)
      • S(e);N_GUARD::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).