MESON Chess Problem Database

Problem Display
PID: 195012 (3bb1q1/3P2p1/3Nk1NR/2P5/6Kp/B4Qn1/8/8 w - - 0 1)

Janet, Frank

Pittsburgh Gazette-Times, 1918

3bb1q1/3P2p1/3Nk1NR/2P5/6Kp/B4Qn1/8/8

#2

8 + 7

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sf1
      • 2.Qf5#
    • 1...Sh1
      • 2.Qf5#
    • 1...Se2
      • 2.Qf5#
    • 1...Se4
      • 2.Qf5#
    • 1...Sf5
      • 2.Qxf5#
    • 1...Sh5
      • 2.Qf5#
  • Tries
    • 1.Qb3+?
      • 1...Kf6
        • 2.Bb2#
      • 1...Kxd7!
    • 1.dxe8Q+?
      • 1...Be7
        • 2.Qxe7#
      • 1...Qxe8!
  • Keys
    • 1.Sf8+!
      • 1...Ke5
        • 2.Bb2#
      • 1...Ke7
        • 2.Sc8#
        • 2.dxe8Q#
        • 2.dxe8R#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • S(a);N_GUARD::QAB1(B)
    • S(a);N_GUARD::QAB1(B),XS(a)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);P-FLIGHT::B(A)
      • Refutation
        • K(c);S_FLIGHT,XP(H)
    • Try
      • P(H);CHECK,XB(f)
      • Vars
        • B(e);N_GUARD,P_SPINB(e)::QAR1(H),XB(e)
      • Refutation
        • Q(g);XQ(H)
  • Actual
    • S(F);CHECK
    • Vars
      • K(c);P-FLIGHT::B(A)
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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).