MESON Chess Problem Database

Problem Display
PID: 272849 (5K2/8/5p2/1QN2r2/8/2B1k3/1nB3P1/5R2 w - - 0 1)

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

Schackvarlden, 1934

5K2/8/5p2/1QN2r2/8/2B1k3/1nB3P1/5R2

#2

7 + 4

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Rf3
      • 2.Rxf3#
    • 1...Rxc5
      • 2.Rf3#
    • 1...Rd5
      • 2.Rf3#
    • 1...Re5
      • 2.Rf3#
    • 1...Rg5
      • 2.Rf3#
    • 1...Rh5
      • 2.Rf3#
    • 1...Sd1
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
    • 1...Sa4
      • 2.Qd3#
  • Tries
    • 1.Bxf5?
      • threat
        • 2.Rf3#
        • 2.Qe8#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sc4!
    • 1.Bd2+?
      • 1...Kd4
        • 2.Sb3#
        • 2.Se6#
      • 1...Kxd2!
    • 1.Rxf5?
      • threat
        • 2.Rf3#
        • 2.Qe8#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sc4!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Re1#
      • 1...Ke2
        • 2.Re1#
      • 1...Ke4
        • 2.Re1#
      • 1...Rxf1
        • 2.Qe8#
      • 1...Sxd3
        • 2.Qxd3#
      • 1...Rf2
        • 2.Qe8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 8
  • Sets
    • R(c);N_GUARD::R1(A),XR(c)
    • R(c);N_GUARD,XS(F)::R1(A)
    • R(c);N_GUARD::R1(A)
    • S(a);N_GUARD::QAR1(E)
    • S(a);N_GUARD::QAR1(E),XS(a)
  • Tries
    • Try
      • B(B);XR(c)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);N_GUARD::QAR1(E),XS(a)
      • Refutation
        • S(a);
    • Try
      • B(D);CHECK
      • Refutation
        • K(b);S_FLIGHT,XB(D)
    • Try
      • R(A);XR(c)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);N_GUARD::QAR1(E),XS(a)
      • Refutation
        • S(a);
  • Actual
    • S(F);
    • Threat
      • R(A)
    • Vars
      • K(b);P-FLIGHT::R1(A)
      • K(b);P-FLIGHT::R(A)
      • R(c);N_GUARD,XR(A)::QAR(E)
      • S(a);OGATE,XS(F)::QAR1(E),XS(a)
      • R(c);N_GUARD::QAR(E)
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