MESON Chess Problem Database

Problem Display
PID: 199763 (3R2Q1/1p3N1p/1P2pP1P/5b2/2p1k1p1/4N1Bn/3P2PK/8 w - - 0 1)

Pavlov, Mikhail Aleksandrovich

Sachova skladba, 1987

3R2Q1/1p3N1p/1P2pP1P/5b2/2p1k1p1/4N1Bn/3P2PK/8

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sg1
      • 2.Sg5#
    • 1...Sf2
      • 2.Sg5#
    • 1...Sg5
      • 2.Sxg5#
  • Tries
    • 1.Sd1?
      • threat
        • 2.Sc3#
      • 1...c3
        • 2.Sxc3#
        • 2.d3#
      • 1...Bg6!
    • 1.Sxc4?
      • threat
        • 2.d3#
      • 1...Sf2
        • 2.Sg5#
      • 1...Sf4
        • 2.Sg5#
      • 1...Bg6!
    • 1.Qxg4+?
      • 1...Sf4
        • 2.Qf3#
        • 2.Qxf4#
      • 1...Bxg4!
    • 1.Qe8?
      • 1...Bg6
        • 2.Qxe6#
      • 1...Sg1
        • 2.Sg5#
      • 1...Sf2
        • 2.Sg5#
      • 1...Sg5
        • 2.Sxg5#
      • 1...c3
        • 2.Qa4#
      • 1...e5
        • 2.Qxe5#
      • 1...Sf4!
  • Keys
    • 1.Qg5!
      • 1...Sxg5
        • 2.Sxg5#
      • 1...Bg6
        • 2.Qe5#
      • 1...Sg1
        • 2.Qf4#
      • 1...Sf2
        • 2.Qf4#
      • 1...Sf4
        • 2.Qxf4#
      • 1...c3
        • 2.d3#
      • 1...e5
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::S(I)
    • S(a);N_GUARD::S(I),XS(a)
  • Tries
    • Try
      • S(D);
      • Threat
        • S(D)
      • Refutation
        • B(e);
    • Try
      • S(D);XP(b)
      • Threat
        • P(A)
      • Vars
        • S(a);N_GUARD::S(I)
      • Refutation
        • B(e);
    • Try
      • Q(K);CHECK,XP(d)
      • Refutation
        • B(e);XQ(K)
    • Try
      • Q(K);P_PINP(f)
      • Vars
        • B(e);N_GUARD::QAR2(K),XP(f)
        • S(a);N_GUARD::S(I)
        • S(a);N_GUARD::S(I),XS(a)
        • P(b);OGATEB::QAR(K)
        • P(f);OGATE::QAR1(K),XP(f)
      • Refutation
        • S(a);
  • Actual
    • Q(K);
    • Vars
      • S(a);XQ(K)::S(I),XS(a)
      • B(e);OGATE::QAR1(K)
      • S(a);N_GUARD::QAR1(K)
      • S(a);N_GUARD::QAR1(K),XS(a)
      • P(b);N_GUARD::P(A)
      • P(f);N_GUARD::QAB1(K),XB(e)
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).