MESON Chess Problem Database

Problem Display
PID: 184757 (5rN1/5P1p/2Q4P/5p1k/5p1P/5P2/6N1/6K1 w - - 0 1)

Kubbel, Leonid Ivanovich (AKA Kubbel, Karl Artur Leonid)

Deutsches Wochenschach, 1908

5rN1/5P1p/2Q4P/5p1k/5p1P/5P2/6N1/6K1

#2

8 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Re8
      • 2.fxe8Q#
      • 2.fxe8B#
  • Tries
    • 1.Qd5?
      • threat
        • 2.Qxf5#
      • 1...Kg6
        • 2.Sxf4#
      • 1...Rxf7
        • 2.Qxf7#
      • 1...Rxg8!
    • 1.Qd7?
      • threat
        • 2.Qxf5#
      • 1...Kg6
        • 2.Sxf4#
      • 1...Rxf7
        • 2.Qxf7#
      • 1...Rxg8!
    • 1.Qe6?
      • threat
        • 2.Qxf5#
      • 1...Rxf7
        • 2.Qxf7#
      • 1...Rxg8!
    • 1.Qf6?
      • threat
        • 2.Sxf4#
        • 2.Qg5#
        • 2.Qxf5#
      • 1...Rxf7
        • 2.Sxf4#
        • 2.Qg5#
        • 2.Qxf7#
      • 1...Rxg8!
  • Keys
    • 1.Qe8!
      • 1...Kg6
        • 2.Sxf4#
      • 1...Rxf7
        • 2.Qxf7#
      • 1...Rxe8
        • 2.fxe8Q#
        • 2.fxe8B#
      • 1...Rxg8
        • 2.fxg8S#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(e);OGATE::PXR(e)=Q
  • Tries
    • Try
      • Q(E);P_PINP(b)
      • Threat
        • QAR2(E),XP(b)
      • Vars
        • K(c);N_SPINP(b),S_FLIGHT::S(B),XP(a)
        • R(e);OGATE,XP(G)::QAB(E),XR(e)
      • Refutation
        • R(e);P_PINS(B),XS(H)
    • Try
      • Q(E);
      • Threat
        • QAR2(E),XP(b)
      • Vars
        • K(c);S_FLIGHT::S(B),XP(a)
        • R(e);OGATE,XP(G)::QAB(E),XR(e)
      • Refutation
        • R(e);P_PINS(B),XS(H)
    • Try
      • Q(E);
      • Threat
        • QAR2(E),XP(b)
      • Vars
        • R(e);OGATE,XP(G)::QAB(E),XR(e)
      • Refutation
        • R(e);P_PINS(B),XS(H)
    • Try
      • Q(E);
      • Threat
        • DUALS(3)
      • Refutation
        • R(e);P_PINS(B),XS(H)
  • Actual
    • Q(E);
    • Vars
      • K(c);S_FLIGHT::S(B),XP(a)
      • R(e);OGATE,P_SPINR(e),XP(G)::QAB(E),XR(e)
      • R(e);OGATE,XQ(E)::PXR(e)=Q
      • R(e);OGATE,P_PINS(B),XS(H)::PXR(e)=S
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