MESON Chess Problem Database

Problem Display
PID: 2484 (8/8/4B3/1p1p4/3k4/3b2Q1/3K4/4R3 w - - 0 1)

Loyd, Sam

New York Musical World, 1858

8/8/4B3/1p1p4/3k4/3b2Q1/3K4/4R3

#2

4 + 4

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

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Qc3#
    • 1...Bf1
      • 2.Qc3#
    • 1...Bc2
      • 2.Qc3#
    • 1...Bc4
      • 2.Qf2#
      • 2.Qg1#
      • 2.Qe3#
    • 1...Be4
      • 2.Qc3#
    • 1...Bf5
      • 2.Qc3#
    • 1...Bg6
      • 2.Qc3#
    • 1...Bh7
      • 2.Qc3#
  • Tries
    • 1.Rc1?
      • threat
        • 2.Qe3#
      • 1...Ke4
        • 2.Qe3#
      • 1...Be4
        • 2.Qc3#
        • 2.Qg7#
      • 1...Bc2!
    • 1.Qe5+?
      • 1...Kc4
        • 2.Qc3#
      • 1...Kc5!
    • 1.Qg7+?
      • 1...Kc4
        • 2.Qc3#
      • 1...Kc5!
  • Keys
    • 1.Re4+!
      • 1...Kxe4
        • 2.Qe3#
      • 1...Kc5
        • 2.Qc7#
      • 1...Bxe4
        • 2.Qc3#
      • 1...dxe4
        • 2.Qd6#

This is a version of 1944

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • B(a);OGATE::QAB1(C)
  • Tries
    • Try
      • R(A);
      • Threat
        • QAB1(C)
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • B(a);
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT,P_SPINP(d)::QAR1(C)
      • Refutation
        • K(b);P_SPINP(d),S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT,P_SPINP(d)::QAR1(C)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • R(A);CHECK
    • Vars
      • K(b);P-FLIGHT,XR(A)::QAR1(C)
      • K(b);S_FLIGHT::QAR2(C)
      • B(a);OGATE,SBLOCK,XR(A)::QAB1(C)
      • P(d);SBLOCK,S_CUTB(a),XR(A)::QAR2(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).