MESON Chess Problem Database

Problem Display
PID: 189890 (8/1Kp5/1pR5/5p1b/1r1k1P2/N5N1/4PP2/1q1B3Q w - - 0 1)

Hansen, Lorenz

Pittsburgh Gazette-Times, 1912

8/1Kp5/1pR5/5p1b/1r1k1P2/N5N1/4PP2/1q1B3Q

#2

9 + 7

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.Sxf5#
    • 1...Qc2
      • 2.Sxc2#
    • 1...Qa1
      • 2.Sc2#
      • 2.Sxf5#
    • 1...Qc1
      • 2.Sxf5#
    • 1...Qxd1
      • 2.Sxf5#
      • 2.Qxd1#
    • 1...Qb2
      • 2.Sxf5#
    • 1...Qb3
      • 2.Sxf5#
    • 1...Rb2
      • 2.Rc4#
    • 1...Rb3
      • 2.Rc4#
    • 1...Rc4
      • 2.Rxc4#
    • 1...Rb5
      • 2.Rc4#
  • Keys
    • 1.Bb3!
      • threat
        • 2.Qd5#
      • 1...Qxh1
        • 2.Sc2#
      • 1...Qxb3
        • 2.Sxf5#
      • 1...Rxb3
        • 2.Rc4#
      • 1...Rc4
        • 2.Sb5#
        • 2.Rxc4#
      • 1...Qe4
        • 2.Qa1#
      • 1...Rb5
        • 2.Sxb5#
        • 2.Rc4#
      • 1...Bf3
        • 2.Qh8#
      • 1...Bf7
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • Q(a);N_GUARD::S(F),XP(d)
    • Q(a);N_GUARD::S(E),XQ(a)
    • R(b);N_GUARD::R1(H)
    • R(b);N_GUARD::R1(H),XR(b)
  • Actual
    • B(A);
    • Threat
      • QAR1(B)
    • Vars
      • Q(a);N_GUARD,P_PINR(H),XQ(B)::S(E)
      • Q(a);N_GUARD,XB(A)::S(F),XP(d)
      • R(b);N_GUARD,XB(A)::R1(H)
      • Q(a);OGATE,P_PINR(H)::QAB(B)
      • B(e);OGATE,P_PINR(H)::QAB(B)
      • B(e);OGATE::QAB(B)
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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).