MESON Chess Problem Database

Problem Display
PID: 189456 (b7/r1p3BK/1P6/p2p4/Bk6/1P6/p2P4/1nQ5 w - - 0 1)

Kubbel, Leonid Ivanovich (AKA Kubbel, Karl Artur Leonid)

Mecklenburger Tageblatt, 1911

b7/r1p3BK/1P6/p2p4/Bk6/1P6/p2P4/1nQ5

#2

7 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bc6
      • 2.Bf8#
    • 1...Sa3
      • 2.Qc3#
  • Tries
    • 1.Qc3+?
      • 1...Ka3
        • 2.Qc5#
      • 1...Sxc3!
    • 1.Qc4+?
      • 1...Ka3
        • 2.Qc5#
      • 1...dxc4!
    • 1.Qxc7?
      • threat
        • 2.Bf8#
        • 2.Qd6#
      • 1...Ka3
        • 2.Qd6#
        • 2.Qc5#
      • 1...Rxc7!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Bf8#
      • 1...Ka3
        • 2.Qc5#
      • 1...cxb6
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(h);S_CUTP(g)::B(F)
    • S(a);N_GUARD,SBLOCK::QAB1(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB(A)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB(A)
      • Refutation
        • P(e);XQ(A)
    • Try
      • Q(A);XP(g)
      • Threat
        • DUALS(2)
      • Refutation
        • R(f);P_PINB(F),XQ(A)
  • Actual
    • Q(A);
    • Threat
      • B(F)
    • Vars
      • K(c);S_FLIGHT::QAB(A)
      • P(g);N_GUARD,P_PINB(F),XP(E)::QAB(A)
HTML5 logo

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).