MESON Chess Problem Database

Problem Display
PID: 135334 (3Q4/8/7b/4P1Np/5k1N/5Bn1/6pB/6K1 w - - 0 1)

Laib, Kurt Friedrich

Schach-Echo, 1981

3Q4/8/7b/4P1Np/5k1N/5Bn1/6pB/6K1

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Sxg2#
    • 1...Kxe5
      • 2.Bxg3#
    • 1...Bxg5
      • 2.Qd4#
  • Tries
    • 1.Sxg2+?
      • 1...Kf5
        • 2.Qf6#
      • 1...Kxe5!
    • 1.Sg6+?
      • 1...Kf5
        • 2.Qf6#
      • 1...Ke3!
    • 1.Se6+?
      • 1...Ke3
        • 2.Qd4#
      • 1...Kxe5!
    • 1.Sh7?
      • threat
        • 2.Qd4#
      • 1...Kxe5
        • 2.Qf6#
      • 1...Ke3!
    • 1.Bxg3+?
      • 1...Ke3
        • 2.Sxg2#
        • 2.Sf5#
      • 1...Kxg3!
  • Keys
    • 1.Se4!
      • 1...Ke3
        • 2.Qd2#
      • 1...Kxe5
        • 2.Qd6#
      • 1...Bg5
        • 2.Qxg5#
      • 1...Bg7
        • 2.Qg5#
      • 1...Bf8
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(c);N_SPINS(b),S_FLIGHT::S(D),XP(a)
    • K(c);S_FLIGHT,XP(E)::B(B),XS(b)
    • B(e);SBLOCK,XS(F)::QAR2(G)
  • Tries
    • Try
      • S(D);CHECK,XP(a)
      • Vars
        • K(c);N_SPINS(b),P-FLIGHT::QAR1(G)
      • Refutation
        • K(c);S_FLIGHT,XP(E)
    • Try
      • S(D);CHECK
      • Vars
        • K(c);N_SPINS(b),P-FLIGHT::QAR1(G)
      • Refutation
        • K(c);N_SPINS(b),S_FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • K(c);N_SPINS(b),S_FLIGHT::QAB1(G)
      • Refutation
        • K(c);S_FLIGHT,XP(E)
    • Try
      • S(F);
      • Threat
        • QAR2(G)
      • Vars
        • K(c);S_FLIGHT,XP(E)::QAB1(G)
      • Refutation
        • K(c);N_SPINS(b),S_FLIGHT
    • Try
      • B(B);CHECK,XS(b)
      • Refutation
        • K(c);S_FLIGHT,XB(B)
  • Actual
    • S(F);
    • Vars
      • K(c);N_SPINS(b),S_FLIGHT::QAB1(G)
      • K(c);OGATEB,S_FLIGHT,XP(E)::QAB1(G)
      • B(e);N_GUARD::QAB1(G),XB(e)
      • B(e);N_GUARD::QAB1(G)
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