MESON Chess Problem Database

Problem Display
PID: 75900 (8/7p/1N1Qbp1B/6nR/4kN2/2Pp2K1/2np4/8 w - - 0 1)

Forster, Klaus

Die Schwalbe, 2007

8/7p/1N1Qbp1B/6nR/4kN2/2Pp2K1/2np4/8

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Qxd3#
    • 1...Kf5
      • 2.Qxe6#
    • 1...Sf3
      • 2.Qxd3#
    • 1...Sh3
      • 2.Qxd3#
      • 2.Qxe6#
    • 1...Sf7
      • 2.Qxd3#
  • Tries
    • 1.Sg2?
      • threat
        • 2.Qf4#
      • 1...Sh3
        • 2.Qxe6#
      • 1...Kf5!
    • 1.Sh3?
      • threat
        • 2.Qf4#
      • 1...Ke3
        • 2.Qxe6#
      • 1...Sxh3
        • 2.Qxe6#
      • 1...Kf5!
    • 1.Sfd5?
      • threat
        • 2.Qf4#
      • 1...Sh3
        • 2.Sxf6#
        • 2.Qxe6#
      • 1...Kf5!
    • 1.Qd5+?
      • 1...Ke3
        • 2.Sc4#
        • 2.Qxd3#
      • 1...Bxd5!
  • Keys
    • 1.Sg6!
      • threat
        • 2.Qf4#
      • 1...Ke3
        • 2.Qxe6#
      • 1...Kf5
        • 2.Qxd3#
      • 1...Sh3
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • K(d);P-FLIGHT::QAR1(F),XP(c)
    • K(d);P_SPINS(e),S_FLIGHT::QAB1(F),XB(f)
    • S(e);::QAB1(F),XP(c)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAR1(F)
      • Vars
        • S(e);N_GUARD::QAR2(F),XB(f)
      • Refutation
        • K(d);P_SPINS(e),S_FLIGHT
    • Try
      • S(C);
      • Threat
        • QAR1(F)
      • Vars
        • K(d);P-FLIGHT,P_SPINS(e)::QAR(F),XB(f)
        • S(e);N_GUARD,XS(C)::QAR2(F),XB(f)
      • Refutation
        • K(d);P_SPINS(e),S_FLIGHT
    • Try
      • S(C);
      • Threat
        • QAR1(F)
      • Refutation
        • K(d);P_SPINS(e),S_FLIGHT
    • Try
      • Q(F);CHECK
      • Refutation
        • B(f);XQ(F)
  • Actual
    • S(C);
    • Threat
      • QAR1(F)
    • Vars
      • K(d);P-FLIGHT,P_SPINS(e)::QAR(F),XB(f)
      • K(d);P_SPINS(e),S_FLIGHT::QAB(F),XP(c)
      • S(e);N_GUARD::QAR2(F),XB(f)
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