MESON Chess Problem Database

Problem Display
PID: 165525 (8/8/8/N7/Pk3B2/7Q/8/K7 w - - 0 1)

Antipov, Viacheslav Pavlovich

Schach-WW, 1998

8/8/8/N7/Pk3B2/7Q/8/K7

#2

5 + 1

5454 Near Snap 2017
15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Tries
    • 1.Bd2+?
      • 1...Kxa4
        • 2.Qb3#
      • 1...Kc5!
    • 1.Bc7?
      • 1...Kxa4
        • 2.Qb3#
      • 1...Kc5!
    • 1.Qb3+?
      • 1...Kxa5
        • 2.Qb5#
      • 1...Kc5!
    • 1.Qd3?
      • 1...Kxa5
        • 2.Qb5#
      • 1...Kc5
        • 2.Qd6#
      • 1...Kxa4!
  • Keys
    • 1.Qd7!
      • 1...Ka3
        • 2.Bd6#
      • 1...Kc3
        • 2.Qd2#
      • 1...Kxa5
        • 2.Qb5#
      • 1...Kc5
        • 2.Qd6#

Anticipated by 10692(1967), 219856(1974), 95064(1984), 161761(1997)

This anticipates 168594(2005), 153215(2011)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • K(a);P-FLIGHT,XP(C)::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(D);
      • Vars
        • K(a);P-FLIGHT,XP(C)::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XS(E)::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT,XS(E)::QAR1(B)
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT,XP(C)
  • Actual
    • Q(B);
    • Vars
      • K(a);S_FLIGHT::B(D)
      • K(a);S_FLIGHT::QAB1(B)
      • K(a);S_FLIGHT,XS(E)::QAR1(B)
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