MESON Chess Problem Database

Problem Display
PID: 74050 (1Q6/8/5B2/8/3NN3/K3kPp1/2P1n2r/3B4 w - - 0 1)

Strerath, Otto

1st Comm., Arbejder-Skak, 1950

1Q6/8/5B2/8/3NN3/K3kPp1/2P1n2r/3B4

#2

8 + 4

3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Sf5#
    • 1...Sg1
      • 2.Sf5#
    • 1...Sc3
      • 2.Sf5#
    • 1...Sxd4
      • 2.Bg5#
    • 1...Sf4
      • 2.Sf5#
  • Tries
    • 1.Bg5+?
      • 1...Sf4
        • 2.Sf5#
      • 1...Kxd4!
    • 1.Qf4+?
      • 1...Sxf4
        • 2.Sf5#
      • 1...Kxf4!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qd2#
      • 1...Kf4
        • 2.Qd2#
      • 1...Sxd4
        • 2.Bg5#
      • 1...Sc1
        • 2.Bg5#
      • 1...Sg1
        • 2.Bg5#
      • 1...Sc3
        • 2.Bg5#
      • 1...Sf4
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(a);::S(E)
    • S(a);N_GUARD,SBLOCK,XS(E)::B(G)
  • Tries
    • Try
      • B(G);CHECK
      • Vars
        • S(a);P_SPINS(a)::S(E)
      • Refutation
        • K(c);S_FLIGHT,XS(E)
    • Try
      • Q(H);CHECK
      • Vars
        • S(a);SBLOCK,XQ(H)::S(E)
      • Refutation
        • K(c);S_FLIGHT,XQ(H)
  • Actual
    • Q(H);
    • Threat
      • QAB1(H)
    • Vars
      • K(c);S_FLIGHT::QAB(H)
      • S(a);N_GUARD,XS(E)::B(G)
      • S(a);N_GUARD::B(G)
      • S(a);SBLOCK::S(E)
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