MESON Chess Problem Database

Problem Display
PID: 82332 (8/6K1/5Rp1/4k3/1p2P3/4Q2p/4B3/1b2N2q w - - 0 1)

Ahues, Herbert Siegfried Oskar

Die Schwalbe, 1990

8/6K1/5Rp1/4k3/1p2P3/4Q2p/4B3/1b2N2q

#2

6 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qf3
      • 2.Sxf3#
    • 1...Qg1
      • 2.Sf3#
    • 1...Qh2
      • 2.Sf3#
    • 1...Ba2
      • 2.Sd3#
    • 1...Bd3
      • 2.Sxd3#
  • Tries
    • 1.Bd3?
      • threat
        • 2.Qc5#
      • 1...Qxe4
        • 2.Qxe4#
      • 1...Bxd3
        • 2.Sxd3#
      • 1...Qg1
        • 2.Sf3#
      • 1...Ba2!
    • 1.Bf3?
      • threat
        • 2.Qc5#
      • 1...Qxf3
        • 2.Sxf3#
      • 1...Bxe4
        • 2.Qxe4#
      • 1...Ba2
        • 2.Sd3#
      • 1...Qg1!
  • Keys
    • 1.Bc4!
      • threat
        • 2.Re6#
      • 1...Qxe4
        • 2.Sf3#
      • 1...Bxe4
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(b);N_GUARD::S(A),XQ(b)
    • Q(b);N_GUARD::S(A)
    • B(a);N_GUARD::S(A)
    • B(a);N_GUARD::S(A),XB(a)
  • Tries
    • Try
      • B(B);
      • Threat
        • QAR2(C)
      • Vars
        • Q(b);OGATE,P_SPINQ(b),XP(D)::QAR1(C),XQ(b)
        • B(a);XB(B)::S(A),XB(a)
        • Q(b);N_GUARD::S(A)
      • Refutation
        • B(a);
    • Try
      • B(B);
      • Threat
        • QAR2(C)
      • Vars
        • Q(b);XB(B)::S(A),XQ(b)
        • B(a);OGATE,P_SPINB(a),XP(D)::QAR1(C),XB(a)
        • B(a);N_GUARD::S(A)
      • Refutation
        • Q(b);
  • Actual
    • B(B);
    • Threat
      • R1(E)
    • Vars
      • Q(b);N_GUARD,P_SPINQ(b),XP(D)::S(A)
      • B(a);N_GUARD,P_SPINB(a),XP(D)::S(A)
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