MESON Chess Problem Database

Problem Display
PID: 2483 (8/4Q3/4p3/R1b1k3/1N5P/4Np2/1K3P2/8 w - - 0 1)

Loyd, Sam

American Union, 1858

8/4Q3/4p3/R1b1k3/1N5P/4Np2/1K3P2/8

#2

7 + 4

1679 American Chess Nuts 1868
5206 Sam Loyd and His Chess Problems 1913

SOLUTION

  • SOUND
  • Tries
    • 1.Qxc5+?
      • 1...Ke4
        • 2.Qc4#
        • 2.Qe5#
      • 1...Kf4
        • 2.Qd4#
        • 2.Qc4#
        • 2.Qe5#
      • 1...Kf6!
    • 1.Qf8?
      • 1...Kd4
        • 2.Qf4#
      • 1...Ke4!
    • 1.Qxe6+?
      • 1...Kd4
        • 2.Sec2#
        • 2.Sf5#
        • 2.Qd5#
      • 1...Kf4
        • 2.Sed5#
        • 2.Sd3#
        • 2.Sbd5#
        • 2.Qf5#
      • 1...Kxe6!
    • 1.Qf7?
      • 1...Kd4
        • 2.Qf4#
      • 1...Kd6
        • 2.Sc4#
      • 1...Ke4!
  • Keys
    • 1.Qh7!
      • 1...Kd4
        • 2.Sc6#
      • 1...Kf4
        • 2.Sd3#
      • 1...Kd6
        • 2.Sc4#
      • 1...Kf6
        • 2.Sg4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(G);CHECK,N_PINP(d),XB(b)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(G);N_PINP(d)
      • Vars
        • K(c);N_SPINB(b),S_FLIGHT::QAR2(G)
      • Refutation
        • K(c);N_SPINB(b),P-FLIGHT
    • Try
      • Q(G);CHECK,XP(d)
      • Refutation
        • K(c);N_SPINB(b),P-FLIGHT,XQ(G)
    • Try
      • Q(G);N_PINP(d)
      • Vars
        • K(c);N_SPINB(b),S_FLIGHT::QAR2(G)
        • K(c);N_SPINB(b),S_FLIGHT::S(C)
      • Refutation
        • K(c);N_SPINB(b),P-FLIGHT
  • Actual
    • Q(G);N_PINP(d)
    • Vars
      • K(c);N_SPINB(b),S_FLIGHT::S(D)
      • K(c);N_SPINB(b),S_FLIGHT::S(C)
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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).