MESON Chess Problem Database

Problem Display
PID: 2504 (8/q1P1Q3/8/8/p7/p4p1K/p1P1pk1N/R3b3 w - - 0 1)

Loyd, Sam

Charleston Courier, 1859

8/q1P1Q3/8/8/p7/p4p1K/p1P1pk1N/R3b3

#2

6 + 8

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

SOLUTION

  • SOUND
  • Sets
    • 1...Qc5
      • 2.Qxc5#
    • 1...Qb8
      • 2.Qc5#
    • 1...Qa6
      • 2.Qc5#
    • 1...Qb7
      • 2.Qc5#
    • 1...Qa8
      • 2.Qc5#
    • 1...Bd2
      • 2.Sg4#
    • 1...Bc3
      • 2.Sg4#
    • 1...Bb4
      • 2.Sg4#
    • 1...Ba5
      • 2.Sg4#
  • Tries
    • 1.Sg4+?
      • 1...Kg1
        • 2.Rxe1#
      • 1...Kf1!
    • 1.Qh4+?
      • 1...Kg1
        • 2.Rxe1#
        • 2.Qxe1#
      • 1...Ke3!
  • Keys
    • 1.Qb4!
      • 1...Kg1
        • 2.Qxe1#
      • 1...Ke3
        • 2.Sg4#
      • 1...Qxc7
        • 2.Qd4#
      • 1...Bxb4
        • 2.Sg4#
      • 1...Qe3
        • 2.Qxe1#
      • 1...Qd4
        • 2.Qxd4#
      • 1...Qc5
        • 2.Qxc5#
      • 1...Qb6
        • 2.Qxb6#
      • 1...Qb8
        • 2.Qc5#
        • 2.Qd4#
      • 1...Qa5
        • 2.Qd4#
      • 1...Qa6
        • 2.Qc5#
        • 2.Qd4#
      • 1...Qb7
        • 2.Qc5#
        • 2.Qd4#
      • 1...Qa8
        • 2.Qc5#
        • 2.Qd4#
        • 2.Qb6#
      • 1...Bd2
        • 2.Sg4#
      • 1...Bc3
        • 2.Sg4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 5
  • Sets
    • Q(h);N_GUARD::QAB(F),XQ(h)
    • Q(h);N_GUARD::QAB(F)
    • B(a);::S(C)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(d);P_SPINB(a),S_FLIGHT::R(A),XB(a)
      • Refutation
        • K(d);P-FLIGHT,P_SPINB(a)
    • Try
      • Q(F);CHECK
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • Q(F);
    • Vars
      • K(d);P_SPINB(a),S_FLIGHT::QAR2(F),XB(a)
      • K(d);S_FLIGHT::S(C)
      • Q(h);N_GUARD,XP(E)::QAB(F)
      • B(a);XQ(F)::S(C)
      • Q(h);SBLOCK::QAB1(F),XB(a)
      • Q(h);N_GUARD::QAB(F),XQ(h)
      • Q(h);N_GUARD::QAB(F)
      • B(a);::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).