MESON Chess Problem Database

Problem Display
PID: 89027 (8/3K4/1P4N1/b2k1p2/1pnpNB2/1B5p/2P4P/6Q1 w - - 0 1)

Pypa, Volodimir Iosifovich

Buletin Problemistic, 1985

8/3K4/1P4N1/b2k1p2/1pnpNB2/1B5p/2P4P/6Q1

#2

9 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Qh1#
    • 1...d3
      • 2.Sf6#
    • 1...fxe4
      • 2.Qg5#
  • Tries
    • 1.Bxc4+?
      • 1...Kxe4
        • 2.Qh1#
      • 1...Kxc4!
    • 1.Bd6?
      • threat
        • 2.Sf6#
      • 1...fxe4
        • 2.Sf4#
        • 2.Se7#
        • 2.Qg5#
      • 1...Kxe4!
    • 1.Qd1?
      • 1...Kxe4
        • 2.Qh1#
      • 1...fxe4
        • 2.Qh5#
      • 1...d3
        • 2.Qxd3#
      • 1...Bxb6!
    • 1.Qf1?
      • 1...Kxe4
        • 2.Qh1#
      • 1...fxe4
        • 2.Qxc4#
      • 1...d3
        • 2.Qxd3#
      • 1...Bxb6!
  • Keys
    • 1.Qa1!
      • 1...Kxe4
        • 2.Qh1#
      • 1...Bxb6
        • 2.Qa8#
      • 1...fxe4
        • 2.Qxa5#
      • 1...d3
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(f);N_SPINS(c),OGATEB,S_FLIGHT,XS(E)::QAB(A)
    • P(d);::S(E)
    • P(g);OGATEB,SBLOCK,XS(E)::QAR(A)
  • Tries
    • Try
      • B(D);CHECK,XS(c)
      • Vars
        • K(f);S_FLIGHT,XS(E)::QAB(A)
      • Refutation
        • K(f);S_FLIGHT,XB(D)
    • Try
      • B(F);
      • Threat
        • S(E)
      • Refutation
        • K(f);N_SPINS(c),S_FLIGHT,XS(E)
    • Try
      • Q(A);P_PINP(d)
      • Vars
        • K(f);N_SPINP(d),N_SPINS(c),OGATEB,S_FLIGHT,XS(E)::QAB(A)
        • P(g);OGATEB,SBLOCK,XS(E)::QAR(A)
        • P(d);OGATEB::QAR2(A),XP(d)
      • Refutation
        • B(e);XP(G)
    • Try
      • Q(A);
      • Vars
        • K(f);N_SPINS(c),OGATEB,S_FLIGHT,XS(E)::QAB(A)
        • P(g);SBLOCK,XS(E)::QAB1(A),XS(c)
        • P(d);OGATEB::QAR2(A),XP(d)
      • Refutation
        • B(e);XP(G)
  • Actual
    • Q(A);
    • Vars
      • K(f);N_SPINS(c),OGATEB,S_FLIGHT,XS(E)::QAB(A)
      • B(e);OGATE,XP(G)::QAB(A)
      • P(g);SBLOCK,XS(E)::QAR(A),XB(e)
      • P(d);OGATE::QAR1(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).