MESON Chess Problem Database

Problem Display
PID: 93378 (5B1k/4N3/5n2/6N1/8/QK6/8/8 w - - 0 1)

Dzektser, Abram L

Shakhmaty v SSSR, 1956

5B1k/4N3/5n2/6N1/8/QK6/8/8

#2

5 + 2

3713 Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sh7
      • 2.Sf7#
    • 1...Sg8
      • 2.Sg6#
  • Tries
    • 1.Qd6?
      • threat
        • 2.Qxf6#
      • 1...Se4
        • 2.Qh2#
        • 2.Qh6#
      • 1...Sd5
        • 2.Qh2#
        • 2.Qh6#
      • 1...Sh5
        • 2.Qh6#
      • 1...Sd7
        • 2.Qh2#
        • 2.Qh6#
      • 1...Sh7
        • 2.Sf7#
      • 1...Se8
        • 2.Qh2#
        • 2.Qh6#
      • 1...Sg8
        • 2.Sg6#
      • 1...Sg4!
    • 1.Qa6?
      • threat
        • 2.Qxf6#
      • 1...Se4
        • 2.Qh6#
      • 1...Sd5
        • 2.Qh6#
      • 1...Sh5
        • 2.Qh6#
      • 1...Sd7
        • 2.Qh6#
      • 1...Sh7
        • 2.Sf7#
      • 1...Se8
        • 2.Qh6#
      • 1...Sg8
        • 2.Sg6#
      • 1...Sg4!
  • Keys
    • 1.Qa8!
      • 1...Sg4
        • 2.Bh6#
      • 1...Se4
        • 2.Bh6#
      • 1...Sd5
        • 2.Bh6#
      • 1...Sh5
        • 2.Bh6#
      • 1...Sd7
        • 2.Qh1#
      • 1...Sh7
        • 2.Sf7#
      • 1...Se8
        • 2.Qh1#
      • 1...Sg8
        • 2.Sg6#

Anticipated by 9410(1902-1903), 249052(1947)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(a);SBLOCK::S(C)
    • S(a);SBLOCK::S(D)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB(A),XS(a)
      • Vars
        • S(a);OGATE::QAR2(A)
        • S(a);SBLOCK::S(C)
        • S(a);SBLOCK::S(D)
      • Refutation
        • S(a);
    • Try
      • Q(A);
      • Threat
        • QAB(A),XS(a)
      • Vars
        • S(a);OGATE::QAR2(A)
        • S(a);SBLOCK::S(C)
        • S(a);SBLOCK::S(D)
      • Refutation
        • S(a);
  • Actual
    • Q(A);
    • Vars
      • S(a);N_GUARD::QAR(A)+B(E)
      • S(a);N_GUARD::QAB(A)
      • S(a);SBLOCK::S(C)
      • S(a);SBLOCK::S(D)
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