MESON Chess Problem Database

Problem Display
PID: 193926 (8/b1p5/p5p1/P6b/7n/5pRN/1QN5/1K1B1k2 w - - 0 1)

Hansen, Lorenz

Pittsburgh Gazette-Times, 1916

8/b1p5/p5p1/P6b/7n/5pRN/1QN5/1K1B1k2

#2

7 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bg1
      • 2.Rxg1#
    • 1...Bb8
      • 2.Rg1#
    • 1...c5
      • 2.Rg1#
  • Tries
    • 1.Se3+?
      • 1...Ke1
        • 2.Rg1#
        • 2.Qc3#
        • 2.Qf2#
        • 2.Qb4#
      • 1...Bxe3!
    • 1.Sd4?
      • threat
        • 2.Rg1#
        • 2.Qf2#
      • 1...Ke1
        • 2.Rg1#
      • 1...Sg2
        • 2.Qf2#
      • 1...f2
        • 2.Qxf2#
      • 1...Bxd4!
    • 1.Qc3?
      • threat
        • 2.Qe1#
        • 2.Qd3#
        • 2.Qc4#
      • 1...Bf2
        • 2.Qd3#
        • 2.Qc4#
      • 1...Sg2
        • 2.Qd3#
        • 2.Qc4#
      • 1...f2!
    • 1.Qb4?
      • threat
        • 2.Qe1#
        • 2.Qc4#
      • 1...Bf2
        • 2.Qc4#
      • 1...Sg2
        • 2.Qc4#
      • 1...f2!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Qxa6#
      • 1...f2
        • 2.Qh1#
      • 1...c5
        • 2.Rg1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • B(g);N_GUARD::R1(E),XB(g)
    • B(g);N_GUARD::R1(E)
    • P(h);S_CUTB(g)::R1(E)
  • Tries
    • Try
      • S(D);CHECK
      • Refutation
        • B(g);XS(D)
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::R(E)
        • S(c);::QAR1(C)
        • P(b);::QAR1(C),XP(b)
      • Refutation
        • B(g);XS(D)
    • Try
      • Q(C);
      • Threat
        • DUALS(3)
      • Refutation
        • P(b);
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • B(g);::QAB(C)
        • S(c);::QAB(C)
      • Refutation
        • P(b);
  • Actual
    • Q(C);
    • Threat
      • QAB(C),XP(e)
    • Vars
      • P(b);OGATE::QAR2(C)
      • P(h);S_CUTB(g)::R1(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).