MESON Chess Problem Database

Problem Display
PID: 18870 (8/2R5/8/4kP2/4N2K/8/2B5/7Q w - - 0 1)

van Dooren, Rene

Volksgazet omstr., 1958

8/2R5/8/4kP2/4N2K/8/2B5/7Q

#2

6 + 1

5454 Near Snap 2023

SOLUTION

  • SOUND
  • Tries
    • 1.Sd2?
      • 1...Kd4
        • 2.Qe4#
      • 1...Kf4
        • 2.Qe4#
      • 1...Kf6
        • 2.Qa1#
      • 1...Kd6!
    • 1.Sf2?
      • 1...Kd4
        • 2.Qe4#
      • 1...Kf4
        • 2.Qe4#
      • 1...Kf6
        • 2.Sg4#
        • 2.Qa1#
      • 1...Kd6!
    • 1.Sc3?
      • 1...Kd4
        • 2.Qe4#
      • 1...Kf4
        • 2.Qe4#
      • 1...Kd6
        • 2.Qh2#
      • 1...Kf6!
    • 1.Sg3?
      • 1...Kd4
        • 2.Qe4#
      • 1...Kf4
        • 2.Qe4#
      • 1...Kf6
        • 2.Qa1#
      • 1...Kd6!
    • 1.Sg5?
      • 1...Kd4
        • 2.Qe4#
      • 1...Kf4
        • 2.Qe4#
      • 1...Kf6
        • 2.Qa1#
      • 1...Kd6!
    • 1.Sd6?
      • 1...Kd4
        • 2.Qe4#
      • 1...Kf4
        • 2.Qe4#
      • 1...Kf6
        • 2.Qa1#
      • 1...Kxd6!
    • 1.Rc5+?
      • 1...Kd4
        • 2.Qg1#
      • 1...Kf4!
    • 1.Qa1+?
      • 1...Kd5
        • 2.Rc5#
      • 1...Kxf5
        • 2.Qf6#
      • 1...Kf4!
  • Keys
    • 1.Sf6!
      • 1...Kd4
        • 2.Qe4#
      • 1...Kf4
        • 2.Qe4#
      • 1...Kd6
        • 2.Qh2#
      • 1...Kxf6
        • 2.Qa1#

Anticipated by 182248(1906), 231625(1927)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
        • K(a);S_FLIGHT::QAB(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(C);
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(C);
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
        • K(a);S_FLIGHT::QAB(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(C);
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
        • K(a);S_FLIGHT::QAB(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(C);
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
        • K(a);S_FLIGHT::QAB(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(C);
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
        • K(a);S_FLIGHT::QAB(A)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
    • Try
      • R(F);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::R1(F)
        • K(a);OGATE,P-FLIGHT,XP(E)::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(C);
    • Vars
      • K(a);S_FLIGHT::QAR1(A)
      • K(a);S_FLIGHT::QAB(A)
      • K(a);S_FLIGHT,XS(C)::QAB(A)
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