MESON Chess Problem Database

Problem Display
PID: 110118 (2b1K3/1r1p3p/1p3k1p/2PP3P/4PB1P/2pP1p2/5r1p/6Q1 w - - 0 1)

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

Rigaer Tageblatt, 1907

2b1K3/1r1p3p/1p3k1p/2PP3P/4PB1P/2pP1p2/5r1p/6Q1

#2

9 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rf1
      • 2.Qd4#
    • 1...Ra2
      • 2.Qd4#
    • 1...Rb2
      • 2.Qd4#
    • 1...Rc2
      • 2.Qd4#
    • 1...Rd2
      • 2.Qd4#
    • 1...Re2
      • 2.Qd4#
    • 1...Rg2
      • 2.Qd4#
    • 1...c2
      • 2.Qa1#
  • Tries
    • 1.Be3?
      • threat
        • 2.Bd4#
      • 1...Ke5
        • 2.Qg7#
      • 1...bxc5!
    • 1.Qg8?
      • threat
        • 2.Qf7#
        • 2.Qf8#
        • 2.Qh8#
      • 1...Rg2
        • 2.Qf7#
        • 2.Qf8#
      • 1...d6!
  • Keys
    • 1.Bd2!
      • threat
        • 2.Bxc3#
      • 1...Ke5
        • 2.Qg7#
      • 1...Rxd2
        • 2.Qd4#
      • 1...cxd2
        • 2.Qa1#
      • 1...c2
        • 2.Bc3#
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • R(a);OGATE::QAB(A)
    • R(a);OGATE,P_PINP(C)::QAB(A)
    • P(c);OGATEB::QAB(A)
  • Tries
    • Try
      • B(D);
      • Threat
        • B(D)
      • Vars
        • K(f);S_FLIGHT::QAB(A)
      • Refutation
        • P(e);XP(F)
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Refutation
        • P(i);
  • Actual
    • B(D);
    • Threat
      • B(D),XP(c)
    • Vars
      • K(f);S_FLIGHT::QAB(A)
      • R(a);OGATE,XB(D)::QAB(A)
      • P(c);OGATEB,XB(D)::QAB(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).