MESON Chess Problem Database

Problem Display
PID: 227382 (8/4B3/3r1q1n/4N2P/2p3Pk/2KpQ2p/7P/8 w - - 0 1)

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

Tidskrift for Schack, 1910

8/4B3/3r1q1n/4N2P/2p3Pk/2KpQ2p/7P/8

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qg5
      • 2.Bxg5#
      • 2.Qf2#
      • 2.Qxg5#
      • 2.Qe1#
      • 2.Qg3#
    • 1...Rd4
      • 2.Bxf6#
    • 1...Rd5
      • 2.Bxf6#
    • 1...Rd7
      • 2.Bxf6#
    • 1...Rd8
      • 2.Bxf6#
  • Keys
    • 1.Qd4!
      • threat
        • 2.Sf3#
      • 1...Kg5
        • 2.Sf3#
      • 1...Rxd4
        • 2.Bxf6#
      • 1...Sxg4
        • 2.Qxg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(e);N_GUARD,N_PINS(E)::B(G),XQ(f)
    • R(e);N_GUARD::B(G),XQ(f)
  • Actual
    • Q(C);N_SPINS(E)
    • Threat
      • S(E)
    • Vars
      • K(d);S_FLIGHT::S(E)
      • R(e);N_GUARD,XQ(C)::B(G),XQ(f)
      • S(g);OGATE,P_SPINS(g),XP(D)::QAR1(C),XS(g)
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