MESON Chess Problem Database

Problem Display
PID: 227454 (Q7/3R4/5nR1/4k3/8/2K2B2/8/8 w - - 0 1)

Halumbirek, Josef

Das Ratsel, 1926

Q7/3R4/5nR1/4k3/8/2K2B2/8/8

#2

5 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Qd5#
    • 1...Se4+
      • 2.Qxe4#
    • 1...Sg4
      • 2.Qe4#
    • 1...Sh5
      • 2.Qe4#
    • 1...Sxd7
      • 2.Qe4#
    • 1...Sh7
      • 2.Qe4#
    • 1...Se8
      • 2.Qe4#
    • 1...Sg8
      • 2.Qe4#
  • Tries
    • 1.Rg5+?
      • 1...Ke6
        • 2.Qc6#
      • 1...Kf4!
    • 1.Qb8+?
      • 1...Ke6
        • 2.Bg4#
      • 1...Kf5!
  • Keys
    • 1.Rf7!
      • 1...Se4+
        • 2.Qxe4#
      • 1...Sd5+
        • 2.Qxd5#
      • 1...Kf4
        • 2.Qe4#
      • 1...Kf5
        • 2.Qe4#
      • 1...Kd6
        • 2.Qd5#
      • 1...Ke6
        • 2.Qd5#
      • 1...Sg4
        • 2.Qe4#
        • 2.Qd5#
        • 2.Qa5#
        • 2.Qb8#
        • 2.Qe8#
      • 1...Sh5
        • 2.Qe4#
        • 2.Qd5#
        • 2.Qa5#
        • 2.Qb8#
        • 2.Qe8#
      • 1...Sd7
        • 2.Qe4#
        • 2.Qd5#
        • 2.Qe8#
      • 1...Sh7
        • 2.Qe4#
        • 2.Qd5#
        • 2.Qa5#
        • 2.Qb8#
        • 2.Qe8#
      • 1...Se8
        • 2.Qe4#
        • 2.Qd5#
        • 2.Qa5#
        • 2.Qxe8#
      • 1...Sg8
        • 2.Qe4#
        • 2.Qd5#
        • 2.Qa5#
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • K(a);P-FLIGHT,P_SPINS(b)::QAB1(E)
    • S(b);CHECK,N_GUARD::QAR1(E),XS(b)
    • S(b);N_GUARD::QAR1(E)
    • S(b);N_GUARD,XR(D)::QAR1(E)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINS(b)::B(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • R(D);
    • Vars
      • S(b);CHECK,N_GUARD::QAR1(E),XS(b)
      • K(a);P_SPINS(b),S_FLIGHT::QAR1(E)
      • K(a);P-FLIGHT,P_SPINS(b)::QAB1(E)
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