MESON Chess Problem Database

Problem Display
PID: 3179 (q2N4/4r3/p7/2p5/3kP2R/NBp3Qn/4P2K/1b6 w - - 0 1)

Belyakin, Yuri Maksimovich

1st HM., Chigorin MT, 1949-1950

q2N4/4r3/p7/2p5/3kP2R/NBp3Qn/4P2K/1b6

#2

8 + 8

45 Schach 1950
3105 FIDE Album (1945-1955) 1964

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4
      • 2.Sc6#
    • 1...Qc6
      • 2.Sxc6#
    • 1...Qa7
      • 2.Sc6#
    • 1...Qb8
      • 2.Sc6#
    • 1...Rxe4
      • 2.Se6#
    • 1...Re6
      • 2.Sxe6#
    • 1...Ra7
      • 2.Se6#
    • 1...Rb7
      • 2.Sc6#
      • 2.Se6#
    • 1...Rc7
      • 2.Se6#
    • 1...Rd7
      • 2.Se6#
    • 1...Rf7
      • 2.Se6#
    • 1...Rg7
      • 2.Se6#
    • 1...Rh7
      • 2.Se6#
    • 1...Ba2
      • 2.Sc2#
    • 1...Bc2
      • 2.Sxc2#
    • 1...Bd3
      • 2.e3#
    • 1...Bxe4
      • 2.Sc2#
    • 1...a5
      • 2.Sb5#
  • Tries
    • 1.Qf2+?
      • 1...Ke5
        • 2.Sc4#
      • 1...Sxf2!
    • 1.e5+?
      • 1...Qe4
        • 2.Sc6#
      • 1...Be4
        • 2.Sc2#
      • 1...Sf4!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Qe3#
      • 1...Qxe4
        • 2.Qd6#
      • 1...Rxe4
        • 2.Qe5#
      • 1...Bxe4
        • 2.Qd3#
      • 1...Qb8
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 13
  • Sets
    • Q(h);N_GUARD,P_SPINQ(h),XP(F)::S(H)
    • Q(h);N_GUARD::S(H),XQ(h)
    • Q(h);N_GUARD::S(H)
    • Q(h);N_GUARD,P_PINQ(E)::S(H)
    • R(g);N_GUARD,P_SPINR(g),XP(F)::S(H)
    • R(g);N_GUARD::S(H),XR(g)
    • R(g);N_GUARD::S(H)
    • B(a);N_GUARD::S(C)
    • B(a);N_GUARD::S(C),XB(a)
    • B(a);SBLOCK::P(A)
    • B(a);N_GUARD,P_SPINB(a),XP(F)::S(C)
    • P(f);N_GUARD::S(C)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • K(d);S_FLIGHT::S(C)
      • Refutation
        • S(c);XQ(E)
    • Try
      • P(F);CHECK
      • Vars
        • Q(h);P_SPINQ(h)::S(H)
        • B(a);P_SPINB(a)::S(C)
      • Refutation
        • S(c);P_SPINS(c)
  • Actual
    • S(C);
    • Threat
      • QAB1(E)
    • Vars
      • Q(h);N_GUARD,P_SPINQ(h),XP(F)::QAR2(E)
      • R(g);N_GUARD,P_SPINR(g),XP(F)::QAB1(E)
      • B(a);N_GUARD,P_SPINB(a),XP(F)::QAR1(E)
      • Q(h);N_GUARD,P_PINQ(E)::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).