MESON Chess Problem Database

Problem Display
PID: 190100 (2q5/4pN1Q/p7/2P1pP2/2K1k2b/3N1pP1/5P2/rB6 w - - 0 1)

Hansen, Lorenz

Pittsburgh Gazette-Times, 1913

2q5/4pN1Q/p7/2P1pP2/2K1k2b/3N1pP1/5P2/rB6

#2

9 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qe6+
      • 2.fxe6#
    • 1...Qb7
      • 2.f6#
    • 1...Qxc5+
      • 2.Sxc5#
    • 1...Qc6
      • 2.f6#
    • 1...Qc7
      • 2.f6#
    • 1...Qa8
      • 2.f6#
    • 1...Qb8
      • 2.f6#
    • 1...Qd8
      • 2.f6#
    • 1...Qe8
      • 2.f6#
    • 1...Qf8
      • 2.f6#
    • 1...Ra2
      • 2.Sb2#
    • 1...Ra4+
      • 2.Sb4#
    • 1...Ra5
      • 2.Sc1#
      • 2.Se1#
      • 2.Sb2#
      • 2.Sb4#
      • 2.Sf4#
      • 2.Sdxe5#
    • 1...Bxg3
      • 2.Sg5#
    • 1...Bg5
      • 2.Sxg5#
    • 1...e6
      • 2.Sd6#
      • 2.fxe6#
      • 2.f6#
  • Tries
    • 1.Qg6?
      • threat
        • 2.Qg4#
      • 1...Qe6+
        • 2.fxe6#
      • 1...Qxc5+
        • 2.Sxc5#
      • 1...Ra4+
        • 2.Sb4#
      • 1...Qxf5
        • 2.Qc6#
      • 1...Bxg3
        • 2.Sg5#
      • 1...Bg5
        • 2.Sxg5#
      • 1...Qg8!
  • Keys
    • 1.c6!
      • threat
        • 2.Sc5#
      • 1...Qe6+
        • 2.fxe6#
      • 1...Ra4+
        • 2.Sb4#
      • 1...Bxg3
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 11
  • Sets
    • Q(h);CHECK,N_PINP(F),OGATE::QAB(I)+P(G),XQ(h)
    • Q(h);N_GUARD,N_PINP(F)::QAB(I)+P(G)
    • Q(h);CHECK,XP(F)::B(A)+S(C),DCHECK,XQ(h)
    • Q(h);N_GUARD::QAB(I)+P(G)
    • R(a);N_GUARD::B(A)+S(C)
    • R(a);CHECK,N_GUARD::B(A)+S(C)
    • B(d);N_GUARD,XP(D)::S(H)
    • B(d);N_GUARD::S(H),XB(d)
  • Tries
    • Try
      • Q(I);
      • Threat
        • QAR2(I)
      • Vars
        • Q(h);CHECK,N_PINP(F),OGATE::QAB(I)+P(G),XQ(h)
        • Q(h);CHECK,XP(F)::B(A)+S(C),DCHECK,XQ(h)
        • R(a);CHECK,N_GUARD::B(A)+S(C)
        • Q(h);N_GUARD,N_PINP(F),P_SPINQ(h),SBLOCK,XP(G)::QAB(I)
        • B(d);N_GUARD,XP(D)::S(H)
        • B(d);N_GUARD::S(H),XB(d)
      • Refutation
        • Q(h);N_PINP(F),P_PINS(H)
  • Actual
    • P(F);
    • Threat
      • B(A)+S(C),DCHECK
    • Vars
      • Q(h);CHECK,N_PINP(F),OGATE::QAB(I)+P(G),XQ(h)
      • R(a);CHECK,N_GUARD::B(A)+S(C)
      • B(d);N_GUARD,XP(D)::S(H)
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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).