MESON Chess Problem Database

Problem Display
PID: 62590 (3k4/N1p5/2P1R3/5p2/7P/2b5/5Q2/1K4B1 w - - 0 1)

Capraez, Friedrich

Schachzeitung der Berliner Schachgesellschaft, 1855

3k4/N1p5/2P1R3/5p2/7P/2b5/5Q2/1K4B1

#2

7 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Be1
      • 2.Qd4#
    • 1...Bd2
      • 2.Qd4#
      • 2.Qxd2#
    • 1...Bd4
      • 2.Qxd4#
    • 1...Ba5
      • 2.Qd4#
  • Tries
    • 1.Qc5?
      • threat
        • 2.Qe7#
        • 2.Qf8#
        • 2.Qd5#
      • 1...Be5
        • 2.Qe7#
        • 2.Qf8#
      • 1...Bf6
        • 2.Qf8#
        • 2.Qd5#
      • 1...Bg7
        • 2.Qe7#
        • 2.Qd5#
      • 1...Bb4!
    • 1.Qd2+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...Bxd2!
    • 1.Qg2?
      • threat
        • 2.Qd5#
        • 2.Qg8#
      • 1...Be5
        • 2.Qg8#
      • 1...Bg7
        • 2.Qd5#
      • 1...Bb4!
    • 1.Qxf5?
      • threat
        • 2.Qd5#
        • 2.Qf8#
      • 1...Be5
        • 2.Qf8#
      • 1...Bf6
        • 2.Qd5#
        • 2.Qxf6#
      • 1...Bg7
        • 2.Qd5#
      • 1...Bb4!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Qb8#
      • 1...cxb6
        • 2.Bxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • B(a);N_GUARD::QAR(C)
    • B(a);N_GUARD::QAR(C),XB(a)
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(3)
      • Refutation
        • B(a);
    • Try
      • Q(C);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR(C),XB(a)
      • Refutation
        • B(a);XQ(C)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAR(C)
      • Refutation
        • B(a);
    • Try
      • Q(C);XP(b)
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAR2(C)
        • B(a);::QAR(C)
      • Refutation
        • B(a);
  • Actual
    • Q(C);P_PINP(c)
    • Threat
      • QAR2(C)
    • Vars
      • P(c);N_SPINP(c),OGATE,XQ(C)::B(B),XP(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).