MESON Chess Problem Database

Problem Display
PID: 22391 (5Q2/5B2/8/8/8/3N4/4k3/5N1K w - - 0 1)

Svyatov, Gennadi

Molot, 1970

(First published on Tue Jun 9 1970)

5Q2/5B2/8/8/8/3N4/4k3/5N1K

#2

5 + 1

5454 Near Snap 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf1
      • 2.Bh5#
  • Tries
    • 1.Qc5?
      • 1...Kd1
        • 2.Bh5#
      • 1...Kxf1
        • 2.Qf2#
      • 1...Kxd3
        • 2.Qc4#
      • 1...Kf3!
    • 1.Qe7+?
      • 1...Kd1
        • 2.Bb3#
      • 1...Kxf1
        • 2.Qe1#
      • 1...Kf3
        • 2.Bh5#
      • 1...Kxd3!
    • 1.Qe8+?
      • 1...Kd1
        • 2.Bb3#
      • 1...Kxf1
        • 2.Qe1#
      • 1...Kf3
        • 2.Bh5#
      • 1...Kxd3!
  • Keys
    • 1.Qb4!
      • 1...Kd1
        • 2.Qd2#
      • 1...Kxf1
        • 2.Qe1#
      • 1...Kxd3
        • 2.Qc4#
      • 1...Kf3
        • 2.Bh5#

Anticipated by 22405(1969)

This anticipates 136856(1976)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT,XS(A)::QAR(E)+B(D)
  • Tries
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::B(D)
        • K(a);S_FLIGHT,XS(A)::QAR1(E)
        • K(a);OGATEB,S_FLIGHT,XS(C)::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);S_FLIGHT::B(D)
        • K(a);OGATE,S_FLIGHT,XS(A)::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);S_FLIGHT::B(D)
        • K(a);OGATE,S_FLIGHT,XS(A)::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
  • Actual
    • Q(E);
    • Vars
      • K(a);S_FLIGHT::QAR1(E)
      • K(a);S_FLIGHT,XS(A)::QAR1(E)
      • K(a);OGATEB,S_FLIGHT,XS(C)::QAB1(E)
      • K(a);S_FLIGHT::B(D)
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