MESON Chess Problem Database

Problem Display
PID: 253061 (4r3/3p4/3Q1p2/1N1N2q1/p1P1k1B1/2p1P3/K2bP3/7b w - - 0 1)

Makaronets, Leonid

Probleemblad, 1983

4r3/3p4/3Q1p2/1N1N2q1/p1P1k1B1/2p1P3/K2bP3/7b

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe3
      • 2.Sxf6#
    • 1...Qf4
      • 2.Qxf4#
    • 1...Qh4
      • 2.Qf4#
    • 1...Qxd5
      • 2.Qf4#
    • 1...Qh5
      • 2.Qf4#
    • 1...Qg6
      • 2.Qf4#
    • 1...Qg7
      • 2.Qf4#
    • 1...Qg8
      • 2.Qf4#
    • 1...Bc1
      • 2.Sbxc3#
    • 1...Bxe3
      • 2.Sdxc3#
  • Tries
    • 1.Sdxc3+?
      • 1...Kxe3
        • 2.Qd4#
      • 1...Bxc3!
    • 1.Sxf6+?
      • 1...Kxe3
        • 2.Qd4#
      • 1...Qxf6!
    • 1.Qh2?
      • threat
        • 2.Sd6#
      • 1...Qxe3
        • 2.Sxf6#
      • 1...Qxd5
        • 2.Qf4#
      • 1...Bxe3
        • 2.Sdxc3#
      • 1...Qf4
        • 2.Qxf4#
      • 1...Qe5
        • 2.Qxh1#
      • 1...d6
        • 2.Sxd6#
      • 1...Re6!
    • 1.Qe7+?
      • 1...Qe5
        • 2.Sd6#
      • 1...Rxe7!
  • Keys
    • 1.Se7!
      • threat
        • 2.Qd4#
      • 1...Kxe3
        • 2.Qd4#
      • 1...Qxe3
        • 2.Bf5#
      • 1...Bxe3
        • 2.Sxc3#
      • 1...Qc5
        • 2.Qf4#
      • 1...Qd5
        • 2.Qf4#
      • 1...Qe5
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • Q(f);N_GUARD,SBLOCK,XP(C)::S(G),XP(g)
    • Q(f);N_GUARD::QAR1(H),XQ(f)
    • Q(f);N_GUARD::QAR1(H)
    • Q(f);N_GUARD,P_PINP(D),XS(G)::QAR1(H)
    • B(b);N_GUARD::S(F),XP(c)
    • B(b);N_GUARD,SBLOCK,XP(C)::S(G),XP(c)
  • Tries
    • Try
      • S(G);CHECK,XP(c)
      • Vars
        • K(e);P-FLIGHT,XP(C)::QAB1(H)
      • Refutation
        • B(b);XS(G)
    • Try
      • S(G);CHECK,XP(g)
      • Vars
        • K(e);P-FLIGHT,XP(C)::QAB1(H)
      • Refutation
        • Q(f);XS(G)
    • Try
      • Q(H);
      • Threat
        • S(F)
      • Vars
        • Q(f);N_GUARD,SBLOCK,XP(C)::S(G),XP(g)
        • Q(f);N_GUARD,P_PINP(D),XS(G)::QAR1(H)
        • B(b);N_GUARD,SBLOCK,XP(C)::S(G),XP(c)
        • Q(f);N_GUARD::QAR1(H),XQ(f)
        • Q(f);SBLOCK::QAB(H),XB(a)
        • P(h);::S(F),XP(h)
      • Refutation
        • R(i);
    • Try
      • Q(H);CHECK
      • Vars
        • Q(f);P_SPINQ(f)::S(F)
      • Refutation
        • R(i);XQ(H)
  • Actual
    • S(G);
    • Threat
      • QAR1(H)
    • Vars
      • K(e);P-FLIGHT,XP(C)::QAB1(H)
      • Q(f);N_GUARD,SBLOCK,XP(C)::B(E)
      • B(b);N_GUARD,SBLOCK,XP(C)::S(F),XP(c)
      • Q(f);N_GUARD::QAR1(H)
      • Q(f);N_GUARD,P_PINP(D)::QAR1(H)
      • Q(f);SBLOCK::QAB1(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).