MESON Chess Problem Database

Problem Display
PID: 49706 (1K3N2/B2ppb1B/1Q3n2/4k3/3R2p1/8/8/8 w - - 0 1)

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

Izbrannie Zadachi, 1958

1K3N2/B2ppb1B/1Q3n2/4k3/3R2p1/8/8/8

#2

6 + 6

3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Sd5
      • 2.Sxd7#
      • 2.Re4#
    • 1...Sh5
      • 2.Sxd7#
    • 1...Se8
      • 2.Sxd7#
    • 1...Sg8
      • 2.Sxd7#
    • 1...d5
      • 2.Qc7#
    • 1...e6
      • 2.Qd6#
  • Tries
    • 1.Re4+?
      • 1...Kd5
        • 2.Qc5#
      • 1...Sxe4!
  • Keys
    • 1.Rf4!
      • threat
        • 2.Qd4#
      • 1...Kxf4
        • 2.Qe3#
      • 1...Kd5
        • 2.Qc5#
      • 1...Bd5
        • 2.Sg6#
      • 1...Se4
        • 2.Rf5#
      • 1...Sd5
        • 2.Re4#
      • 1...d5
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • S(c);N_GUARD::S(F),XP(d)
    • P(d);N_GUARD::QAB(B)
    • P(e);N_GUARD::QAB1(B)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • S(c);XR(A)
  • Actual
    • R(A);
    • Threat
      • QAB1(B)
    • Vars
      • K(b);S_FLIGHT,XR(A)::QAB1(B)
      • K(b);P-FLIGHT::QAR1(B)
      • B(f);N_GUARD,SBLOCK::S(F)
      • S(c);SBLOCK::R1(A)
      • S(c);N_GUARD,SBLOCK::R1(A)
      • P(d);N_GUARD,SBLOCK::QAB(B)
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