MESON Chess Problem Database

Problem Display
PID: 6185 (8/1kN1p3/4Bp2/2Q2K2/8/8/8/8 w - - 0 1)

Lindgren, Frithiof

Svenska Dagbladet, 1927

8/1kN1p3/4Bp2/2Q2K2/8/8/8/8

#2

4 + 3

3295 Einfuhrung in die Welt des Schachproblem 1984
5454 Near Snap 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kb8
      • 2.Qb6#
  • Tries
    • 1.Ke4?
      • 1...Kb8
        • 2.Qb6#
      • 1...f5+!
    • 1.Kf4?
      • 1...Kb8
        • 2.Qb6#
      • 1...f5!
    • 1.Kg4?
      • 1...Kb8
        • 2.Qb6#
      • 1...f5+!
    • 1.Kg6?
      • 1...Kb8
        • 2.Qb6#
      • 1...f5!
    • 1.Sb5?
      • 1...Ka8
        • 2.Qa7#
        • 2.Qc8#
      • 1...Kb8
        • 2.Qa7#
        • 2.Qc8#
      • 1...Ka6!
    • 1.Bd5+?
      • 1...Kb8
        • 2.Sa6#
      • 1...Kc8!
    • 1.Qa5?
      • 1...Kb8
        • 2.Qb6#
      • 1...Kc6!
  • Keys
    • 1.Sa6!
      • 1...Kxa6
        • 2.Bc8#
      • 1...Ka8
        • 2.Bd5#

Anticipated by 66425(0000), 207026(1862), 190167(1913), 193931(1916), 202552(1923)

This anticipates 207089(1951), 178750(1960), 69344(1968), 96988(1969), 12478(1979), 221072(1998), 217467(1999)

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(b);P-FLIGHT::QAR2(A)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
      • Refutation
        • P(a);CHECK
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
      • Refutation
        • P(a);CHECK
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • S(D);
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(C);CHECK
      • Vars
        • K(b);P-FLIGHT::S(D)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(D);
    • Vars
      • K(b);S_FLIGHT,XS(D)::B(C)
      • K(b);S_FLIGHT::B(C)
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