MESON Chess Problem Database

Problem Display
PID: 132930 (8/8/8/3Q4/B7/1n2p3/4p3/4k1K1 w - - 0 1)

Antipov, Viacheslav Pavlovich

Novgorodskaya pravda, 1985

8/8/8/3Q4/B7/1n2p3/4p3/4k1K1

#2

3 + 4

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sa1
      • 2.Qa5#
    • 1...Sc1
      • 2.Qa5#
    • 1...Sd4
      • 2.Qa5#
    • 1...Sa5
      • 2.Qxa5#
  • Tries
    • 1.Qd3?
      • 1...Sa1
        • 2.Qc3#
      • 1...Sc1
        • 2.Qc3#
      • 1...Sd4
        • 2.Qc3#
      • 1...Sa5
        • 2.Qc3#
      • 1...Sc5
        • 2.Qc3#
      • 1...Sd2!
    • 1.Qd4?
      • 1...Sd2
        • 2.Qh4#
      • 1...Sa1
        • 2.Qc3#
        • 2.Qb4#
      • 1...Sc1
        • 2.Qc3#
        • 2.Qb4#
      • 1...Sa5
        • 2.Qc3#
        • 2.Qb4#
      • 1...Sc5
        • 2.Qc3#
        • 2.Qb4#
      • 1...Sxd4!
    • 1.Qd6?
      • 1...Sd4
        • 2.Qb4#
      • 1...Sd2
        • 2.Qg3#
      • 1...Sa1
        • 2.Qb4#
      • 1...Sc1
        • 2.Qb4#
      • 1...Sa5
        • 2.Qb4#
      • 1...Sc5!
  • Keys
    • 1.Qd8!
      • 1...Sd4
        • 2.Qa5#
      • 1...Sd2
        • 2.Qh4#
      • 1...Sa1
        • 2.Qa5#
      • 1...Sc1
        • 2.Qa5#
      • 1...Sa5
        • 2.Qxa5#
      • 1...Sc5
        • 2.Qa5#

Anticipated by 2803(0000)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(c);N_GUARD::QAB(C)
    • S(c);N_GUARD::QAB(C),XS(c)
  • Tries
    • Try
      • Q(C);
      • Vars
        • S(c);N_GUARD::QAB(C)
      • Refutation
        • S(c);
    • Try
      • Q(C);
      • Vars
        • S(c);SBLOCK::QAB(C)
      • Refutation
        • S(c);XQ(C)
    • Try
      • Q(C);
      • Vars
        • S(c);N_GUARD::QAB(C)
        • S(c);SBLOCK::QAB(C)
      • Refutation
        • S(c);
  • Actual
    • Q(C);
    • Vars
      • S(c);N_GUARD::QAB(C)
      • S(c);SBLOCK::QAB(C)
      • S(c);N_GUARD::QAB(C),XS(c)
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