MESON Chess Problem Database

Problem Display
PID: 119993 (3N4/8/5PR1/3pk3/8/2N3P1/2Q2K2/8 w - - 0 1)

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

Magyar Sakkvilag, 1911

3N4/8/5PR1/3pk3/8/2N3P1/2Q2K2/8

#2

7 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sf7+?
      • 1...Kd4
        • 2.Se2#
        • 2.Sb5#
      • 1...Ke6!
    • 1.Qe4+?
      • 1...Kd6
        • 2.Qe7#
      • 1...dxe4!
    • 1.Qd2?
      • threat
        • 2.Qf4#
        • 2.Qxd5#
      • 1...Kf5
        • 2.Qg5#
      • 1...d4
        • 2.Qf4#
      • 1...Kd6!
    • 1.Qe2+?
      • 1...Kf5
        • 2.Qh5#
      • 1...Kd6
        • 2.Qe7#
      • 1...Kd4!
  • Keys
    • 1.Se4!
      • 1...Kd4
        • 2.Sc6#
      • 1...Kf5
        • 2.Rg5#
      • 1...dxe4
        • 2.Qc5#
      • 1...d4
        • 2.Rg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(G);CHECK
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(A)
      • Refutation
        • P(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
        • P(a);::QAB1(A)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
        • K(b);OGATE,S_FLIGHT::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(C);
    • Vars
      • K(b);S_FLIGHT::S(G)
      • K(b);P-FLIGHT::R1(F)
      • P(a);OGATEB,SBLOCK,XS(C)::QAR2(A)
      • P(a);SBLOCK::R(F)
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