MESON Chess Problem Database

Problem Display
PID: 76918 (3Bn1NK/4N2p/1P4P1/2PPk1p1/r6P/3bP3/6Q1/b7 w - - 0 1)

Svyatov, Gennadi

1st Prize, Kommuna, 1977

3Bn1NK/4N2p/1P4P1/2PPk1p1/r6P/3bP3/6Q1/b7

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Qxg5#
    • 1...Be4
      • 2.Qh2#
      • 2.Qg3#
    • 1...Bf5
      • 2.Sc6#
    • 1...Sf6
      • 2.Bc7#
    • 1...Sc7
      • 2.Bxc7#
    • 1...Sg7
      • 2.Bc7#
  • Tries
    • 1.Sh6?
      • threat
        • 2.Sc6#
      • 1...Kf6
        • 2.Qxg5#
      • 1...Re4
        • 2.Qxg5#
      • 1...Be4
        • 2.Sg4#
      • 1...Bb5!
    • 1.Bc7+?
      • 1...Sd6
        • 2.Bxd6#
      • 1...Sxc7!
    • 1.Qf3?
      • threat
        • 2.Sc6#
      • 1...Re4
        • 2.Qf5#
      • 1...Be4
        • 2.Qg3#
      • 1...Bb5
        • 2.Qf5#
      • 1...Rf4!
    • 1.Qg4?
      • threat
        • 2.Qe6#
      • 1...Bf5
        • 2.Qxf5#
      • 1...Sc7
        • 2.Bxc7#
      • 1...Sg7
        • 2.Bc7#
      • 1...Rxg4!
    • 1.Qxg5+?
      • 1...Bf5
        • 2.Qxf5#
      • 1...Ke4+!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Sd7#
      • 1...Kxf6
        • 2.Qxg5#
      • 1...Sxf6
        • 2.Bc7#
      • 1...Ra7
        • 2.Sg4#
      • 1...Bb5
        • 2.Qxg5#
      • 1...Bf5
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(c);SBLOCK,S_CUTB(b)::QAR2(A),XP(e)
    • B(b);SBLOCK::S(H)
    • S(g);N_GUARD::B(I)
    • S(g);N_GUARD::B(I),XS(g)
  • Tries
    • Try
      • S(J);
      • Threat
        • S(H)
      • Vars
        • K(d);S_FLIGHT::QAB1(A),XP(e)
        • R(c);SBLOCK,S_CUTB(b)::QAR2(A),XP(e)
        • B(b);S_CUTR(c)::S(J)
      • Refutation
        • B(b);
    • Try
      • B(I);CHECK
      • Vars
        • S(g);N_GUARD,P_SPINS(g)::B(I),XS(g)
      • Refutation
        • S(g);XB(I)
    • Try
      • Q(A);
      • Threat
        • S(H)
      • Vars
        • R(c);S_CUTB(b)::QAR1(A)
        • B(b);SBLOCK,S_CUTR(c)::QAB(A)
        • B(b);N_GUARD::QAR1(A)
      • Refutation
        • R(c);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • B(b);N_GUARD::QAR1(A),XB(b)
        • S(g);N_GUARD::B(I),XS(g)
        • S(g);N_GUARD::B(I)
      • Refutation
        • R(c);XQ(A)
    • Try
      • Q(A);CHECK,XP(e)
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::QAR1(A),XB(b)
      • Refutation
        • K(d);CHECK,P-FLIGHT
  • Actual
    • S(J);
    • Threat
      • S(J)
    • Vars
      • K(d);S_FLIGHT,XS(J)::QAB1(A),XP(e)
      • S(g);N_GUARD,SBLOCK,XS(J)::B(I)
      • R(c);N_GUARD::S(J)
      • B(b);N_GUARD::QAR2(A),XP(e)
      • B(b);SBLOCK::S(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).