MESON Chess Problem Database

Problem Display
PID: 19349 (2K5/8/1pP1Pp2/4nP2/2kNQ3/1N3P2/4P3/3BB3 w - - 0 1)

Heinonen, Erkki

1st Prize, Suomen TT, 1972

2K5/8/1pP1Pp2/4nP2/2kNQ3/1N3P2/4P3/3BB3

#2

11 + 4

3753 FIDE Album (1971-1973) 1978

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3
      • 2.exd3#
    • 1...Sxc6
      • 2.Qxc6#
  • Tries
    • 1.Bc2?
      • 1...Sxf3
        • 2.Bd3#
      • 1...Sxc6
        • 2.Bd3#
        • 2.Qxc6#
      • 1...Sg4
        • 2.Bd3#
      • 1...Sd3
        • 2.Bxd3#
        • 2.exd3#
      • 1...Sg6
        • 2.Bd3#
      • 1...Sd7
        • 2.Bd3#
      • 1...Sf7
        • 2.Bd3#
      • 1...b5!
    • 1.Qxe5?
      • threat
        • 2.Qb5#
      • 1...b5
        • 2.Sa5#
        • 2.Qxb5#
        • 2.Qc5#
      • 1...fxe5!
    • 1.e3?
      • 1...Sxf3
        • 2.Be2#
      • 1...Sxc6
        • 2.Be2#
      • 1...Sg4
        • 2.Be2#
      • 1...Sg6
        • 2.Be2#
      • 1...Sd7
        • 2.Be2#
      • 1...Sf7
        • 2.Be2#
      • 1...b5
        • 2.Se2#
      • 1...Sd3!
    • 1.c7?
      • 1...Sxf3
        • 2.Qc6#
      • 1...Sg4
        • 2.Qc6#
      • 1...Sd3
        • 2.exd3#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sg6
        • 2.Qc6#
      • 1...Sf7
        • 2.Qc6#
      • 1...b5
        • 2.Sc6#
      • 1...Sd7!
  • Keys
    • 1.e7!
      • 1...Sxf3
        • 2.Qe6#
      • 1...Sxc6
        • 2.Qxc6#
        • 2.Qe6#
      • 1...Sg4
        • 2.Qe6#
      • 1...Sd3
        • 2.Qe6#
        • 2.exd3#
      • 1...Sg6
        • 2.Qe6#
      • 1...Sd7
        • 2.Qe6#
      • 1...Sf7
        • 2.Qe6#
      • 1...b5
        • 2.Se6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • S(b);OGATE::P(C),XS(b)
    • S(b);OGATE,XP(I)::QAR2(G),XS(b)
  • Tries
    • Try
      • B(A);
      • Vars
        • S(b);N_GUARD,XP(E)::B(A)
        • S(b);N_GUARD::B(A)
      • Refutation
        • P(c);
    • Try
      • Q(G);XS(b)
      • Threat
        • QAB1(G)
      • Refutation
        • P(d);XQ(G)
    • Try
      • P(C);
      • Vars
        • S(b);N_GUARD,XP(E)::B(A)
        • S(b);N_GUARD,XP(I)::B(A)
        • S(b);N_GUARD::B(A)
        • P(c);SBLOCK::QAR(G)+S(F)
      • Refutation
        • S(b);
    • Try
      • P(I);
      • Vars
        • S(b);N_GUARD,XP(E)::QAR2(G)
        • S(b);N_GUARD::QAR2(G)
        • S(b);OGATE::P(C),XS(b)
        • S(b);N_GUARD::QAR2(G),XS(b)
        • P(c);SBLOCK::QAR(G)+S(F)
      • Refutation
        • S(b);
  • Actual
    • P(J);
    • Vars
      • S(b);OGATE,XP(E)::QAB(G)
      • S(b);OGATE::QAB(G)
      • P(c);SBLOCK::QAR(G)+S(F)
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