MESON Chess Problem Database

Problem Display
PID: 80039 (k1N4Q/Bp6/n7/8/8/8/7K/8 w - - 0 1)

Antipov, Viacheslav Pavlovich

Novgorodskaya pravda, 1983

k1N4Q/Bp6/n7/8/8/8/7K/8

#2

4 + 3

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Sd6+?
      • 1...Sb8
        • 2.Qxb8#
      • 1...Kxa7!
    • 1.Se7+?
      • 1...Sb8
        • 2.Qxb8#
      • 1...Kxa7!
    • 1.Qe5?
      • 1...b5
        • 2.Qe4#
        • 2.Qd5#
      • 1...b6
        • 2.Qe4#
        • 2.Qd5#
      • 1...Sb4
        • 2.Qb8#
      • 1...Sc5
        • 2.Qb8#
      • 1...Sb8
        • 2.Qxb8#
      • 1...Sc7!
  • Keys
    • 1.Qa1!
      • 1...b5
        • 2.Qh1#
      • 1...b6
        • 2.Qh1#
      • 1...Sb4
        • 2.Sb6#
      • 1...Sc5
        • 2.Sb6#
      • 1...Sc7
        • 2.Sb6#
      • 1...Sb8
        • 2.Sb6#

Anticipated by 46511(1956)

This anticipates 214405(1987)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR1(D),XS(a)
      • Refutation
        • K(c);P-FLIGHT,XB(B)
    • Try
      • S(C);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR1(D),XS(a)
      • Refutation
        • K(c);P-FLIGHT,XB(B)
    • Try
      • Q(D);
      • Vars
        • S(a);N_GUARD::QAR1(D)
        • S(a);N_GUARD::QAR1(D),XS(a)
      • Refutation
        • S(a);
  • Actual
    • Q(D);
    • Vars
      • P(b);OGATEB::QAB(D)
      • S(a);::S(C)
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