MESON Chess Problem Database

Problem Display
PID: 171451 (2n5/8/1n6/k7/B3Q3/B7/2K5/8 w - - 0 1)

Antipov, Viacheslav Pavlovich

Shakh-M (Borovich), 1998

2n5/8/1n6/k7/B3Q3/B7/2K5/8

#2

4 + 3

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Qa8+?
      • 1...Sa7
        • 2.Qxa7#
      • 1...Sxa8!
    • 1.Qe1+?
      • 1...Kxa4
        • 2.Qb4#
      • 1...Ka6!
  • Keys
    • 1.Qb7!
      • 1...Kxa4
        • 2.Qa6#
      • 1...Sxa4
        • 2.Bb4#
      • 1...Sc4
        • 2.Qb5#
      • 1...Sd5
        • 2.Qb5#
      • 1...Sd7
        • 2.Qb5#
      • 1...Sa8
        • 2.Qb5#
      • 1...Sd6
        • 2.Qa7#
      • 1...Sa7
        • 2.Qxa7#
      • 1...Se7
        • 2.Qa7#

Anticipated by 10640(1966)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAR2(D),XS(c)
      • Refutation
        • S(b);XQ(D)
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);P-FLIGHT,XB(C)::QAR1(D)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(D);
    • Vars
      • K(a);P-FLIGHT,XB(C)::QAR2(D)
      • S(b);SBLOCK,XB(C)::B(B)
      • S(b);OGATE::QAR1(D)
      • S(c);N_GUARD::QAR2(D)
      • S(c);N_GUARD::QAR2(D),XS(c)
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