MESON Chess Problem Database

Problem Display
PID: 207652 (8/3Qp3/4R3/6N1/6k1/8/6N1/7K w - - 0 1)

Didenko, Vladimir Vasilovich

Sachova skladba, 1991

8/3Qp3/4R3/6N1/6k1/8/6N1/7K

#2

5 + 2

5454 Near Snap 2020
3713 Snap 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Se4?
      • 1...Kf3
        • 2.Qd1#
      • 1...Kh3
        • 2.Rh6#
        • 2.Rxe7#
      • 1...Kh5
        • 2.Qd1#
      • 1...Kf5!
    • 1.Qa4+?
      • 1...Kg3
        • 2.Qf4#
        • 2.Qh4#
      • 1...Kf5
        • 2.Qf4#
      • 1...Kh5
        • 2.Qh4#
      • 1...Kxg5!
    • 1.Qd2?
      • 1...Kg3
        • 2.Qf4#
      • 1...Kf5
        • 2.Qf4#
      • 1...Kh5!
    • 1.Qd3?
      • 1...Kxg5
        • 2.Qg6#
      • 1...Kh5!
    • 1.Qd4+?
      • 1...Kg3
        • 2.Qf4#
        • 2.Qh4#
      • 1...Kf5
        • 2.Qf4#
      • 1...Kh5
        • 2.Qh4#
      • 1...Kxg5!
    • 1.Qd5?
      • 1...Kg3
        • 2.Qf3#
      • 1...Kh5!
  • Keys
    • 1.Sh3!
      • 1...Kf3
        • 2.Re3#
      • 1...Kg3
        • 2.Re3#
      • 1...Kxh3
        • 2.Re3#
      • 1...Kf5
        • 2.Se3#
      • 1...Kh5
        • 2.Qd1#

Anticipated by 21970(1922), 109413(1950)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Vars
        • K(a);S_FLIGHT::QAB(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
        • K(a);OGATE,S_FLIGHT::QAR1(E)
      • Refutation
        • K(a);P-FLIGHT,XS(C)
    • Try
      • Q(E);
      • Vars
        • K(a);P-FLIGHT::QAB1(E)
        • K(a);S_FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XS(C)::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
        • K(a);OGATE,S_FLIGHT::QAR1(E)
      • Refutation
        • K(a);P-FLIGHT,XS(C)
    • Try
      • Q(E);
      • Vars
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(C);
    • Vars
      • K(a);S_FLIGHT::R1(D)
      • K(a);P-FLIGHT::R(D)
      • K(a);S_FLIGHT,XS(C)::QAB(E)+R(D),DCHECK
      • K(a);S_FLIGHT::S(B)
      • K(a);S_FLIGHT::QAB(E)
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