MESON Chess Problem Database

Problem Display
PID: 33254 (8/8/8/2N3R1/p4p1B/Q1K1bk2/8/4R3 w - - 0 1)

Funk, Jacob E

Los Angeles Express, 1922

8/8/8/2N3R1/p4p1B/Q1K1bk2/8/4R3

#2

6 + 4

3360 Simple Two-move Themes 1924
3310 2345 Chess Problems 1997
14742 UKCSC Postal Round 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Bd2+
      • 2.Kxd2#
    • 1...Bd4+
      • 2.Kxd4#
  • Tries
    • 1.Sd7?
      • 1...Bd2+
        • 2.Kxd2#
      • 1...Bd4+
        • 2.Kxd4#
      • 1...Bc1
        • 2.Se5#
      • 1...Bg1
        • 2.Se5#
      • 1...Bf2
        • 2.Se5#
      • 1...Bc5
        • 2.Se5#
      • 1...Bb6
        • 2.Se5#
      • 1...Ba7
        • 2.Se5#
      • 1...Ke4!
    • 1.Rf1+?
      • 1...Bf2
        • 2.Kd2#
      • 1...Ke2!
    • 1.Rg3+?
      • 1...Kf2
        • 2.Sd3#
      • 1...fxg3!
  • Keys
    • 1.Sb3!
      • 1...Bd2+
        • 2.Sxd2#
      • 1...Bd4+
        • 2.Sxd4#
      • 1...Ke4
        • 2.Sd2#
      • 1...axb3
        • 2.Qa8#
      • 1...Bc1
        • 2.Sd4#
      • 1...Bg1
        • 2.Sd2#
      • 1...Bf2
        • 2.Sd2#
      • 1...Bc5
        • 2.Sd2#
      • 1...Bb6
        • 2.Sd2#
      • 1...Ba7
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • B(a);CHECK::QAR(B)+K(C),XB(a)
  • Tries
    • Try
      • S(E);
      • Vars
        • B(a);CHECK::QAR(B)+K(C),XB(a)
        • B(a);::S(E)
      • Refutation
        • K(b);P_SPINB(a),S_FLIGHT
    • Try
      • R(A);CHECK
      • Vars
        • B(a);P_SPINB(a)::QAR(B)+K(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(F);CHECK
      • Vars
        • K(b);P-FLIGHT::S(E)
      • Refutation
        • P(d);XR(F)
  • Actual
    • S(E);
    • Vars
      • B(a);CHECK,N_GUARD::S(E),XB(a)
      • K(b);P_SPINB(a),S_FLIGHT::S(E)
      • P(c);OGATE,XS(E)::QAB(B)
      • B(a);N_GUARD::S(E)
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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).