MESON Chess Problem Database

Problem Display
PID: 193922 (8/2K5/3N4/N3kPP1/2P1bp2/p7/2r5/3Q4 w - - 0 1)

Hansen, Lorenz

Pittsburgh Gazette-Times, 1916

8/2K5/3N4/N3kPP1/2P1bp2/p7/2r5/3Q4

#2

7 + 5

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc4+
      • 2.Saxc4#
    • 1...Bd3
      • 2.Sc6#
    • 1...Bd5
      • 2.Qxd5#
    • 1...Bxf5
      • 2.Qd5#
    • 1...Bc6
      • 2.Sxc6#
  • Tries
    • 1.Qa1+?
      • 1...Rc3
        • 2.Qxc3#
      • 1...Rb2!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Qxe4#
      • 1...Rxc4+
        • 2.Saxc4#
      • 1...Bxd3
        • 2.Sc6#
      • 1...Bxf5
        • 2.Qd5#
      • 1...Re2
        • 2.Qc3#
      • 1...Bh1
        • 2.Sf7#
      • 1...Bg2
        • 2.Sf7#
      • 1...Bf3
        • 2.Sf7#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Bc6
        • 2.Sxc6#
        • 2.Sf7#
      • 1...Bb7
        • 2.Sf7#
      • 1...Ba8
        • 2.Sf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • R(a);CHECK,XP(B)::S(C),XR(a)
    • B(c);N_GUARD::S(C)
    • B(c);N_GUARD::QAR1(A),XB(c)
    • B(c);N_GUARD,XP(D)::QAR1(A)
    • B(c);N_GUARD,N_PINP(B)::S(C),XB(c)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAB(A),XR(a)
      • Refutation
        • R(a);N_PINP(B),P_SPINR(a)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XB(c)
    • Vars
      • R(a);CHECK,XP(B)::S(C),XR(a)
      • B(c);N_GUARD,XQ(A)::S(C)
      • B(c);N_GUARD,XP(D)::QAR1(A)
      • R(a);N_GUARD,N_PINP(B)::QAB(A)
      • B(c);::S(F)
      • B(c);N_GUARD::QAR1(A),XB(c)
HTML5 logo

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).