MESON Chess Problem Database

Problem Display
PID: 90199 (6b1/2P1b2r/r1pP1pp1/1P1k4/8/1N2R1Qp/2pN3K/8 w - - 0 1)

Wielgos, Oskar

Die Schwalbe, 1964

6b1/2P1b2r/r1pP1pp1/1P1k4/8/1N2R1Qp/2pN3K/8

#2

8 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Be6
      • 2.Rd3#
    • 1...f5
      • 2.Qe5#
  • Tries
    • 1.c8Q?
      • threat
        • 2.Rd3#
      • 1...Ra4
        • 2.Qxc6#
      • 1...Rh4
        • 2.Qxg8#
      • 1...c1S!
  • Keys
    • 1.c8S!
      • threat
        • 2.Qf3#
      • 1...Bxd6
        • 2.Qxd6#
      • 1...Ra4
        • 2.Sb6#
      • 1...Rh4
        • 2.Sxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • B(j);SBLOCK::R(D)
    • P(f);N_GUARD::QAR1(E)
  • Tries
    • Try
      • P(H);
      • Threat
        • R(D)
      • Vars
        • R(d);N_GUARD::QAB1(H),XP(e)
        • R(i);N_GUARD::QAB(H),XB(j)
      • Refutation
        • P(a);
  • Actual
    • P(H);
    • Threat
      • QAB(E)
    • Vars
      • B(h);OGATE,P_PINQ(E),XP(G)::QAR1(E),XB(h)
      • R(d);N_GUARD::S(H)
      • R(i);N_GUARD::S(H),XB(h)
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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).