MESON Chess Problem Database

Problem Display
PID: 208749 (5B2/1p1KN3/8/P1k2P2/Q2N4/2pqp2b/8/8 w - - 0 1)

Brown, Theodore Morris

St. Louis Globe Democrat, 1875

5B2/1p1KN3/8/P1k2P2/Q2N4/2pqp2b/8/8

#2

7 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Se6#
    • 1...Qf1
      • 2.Sb3#
      • 2.Se6#
    • 1...Qc2
      • 2.Se6#
    • 1...Qe2
      • 2.Sb3#
      • 2.Se6#
    • 1...Qe4
      • 2.Sb3#
    • 1...Qa6
      • 2.Sb3#
  • Tries
    • 1.Qb5+?
      • 1...Kxd4
        • 2.Qd5#
      • 1...Qxb5+!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Sc6#
      • 1...Qxf5+
        • 2.Sexf5#
      • 1...Qxd4+
        • 2.Sd5#
      • 1...Bxf5+
        • 2.Sxf5#
      • 1...Kxd4
        • 2.Qd5#
      • 1...Qc4
        • 2.Qb6#
      • 1...Qe4
        • 2.Qxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • Q(b);N_PINS(B)::S(B)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(e);OGATE,S_FLIGHT,XS(B)::QAR1(A)
      • Refutation
        • Q(b);CHECK,N_PINS(B),XQ(A)
  • Actual
    • Q(A);
    • Threat
      • B(G)+S(F)
    • Vars
      • Q(b);CHECK,N_PINS(B),XP(D)::B(G)+S(F),XQ(b)
      • Q(b);CHECK,SBLOCK,XS(B)::B(G)+S(F)
      • B(d);CHECK,XP(D)::B(G)+S(F),XB(d)
      • K(e);S_FLIGHT,XS(B)::QAR1(A)
      • Q(b);N_PINS(B),SBLOCK::QAB1(A)
      • Q(b);N_GUARD,N_PINS(B)::QAR2(A),XP(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).