MESON Chess Problem Database

Problem Display
PID: 276167 (8/3prp2/KR4pQ/1pPpk1b1/p2N2n1/4PP1B/2q5/B7 w - - 0 1)

Manskopf, Johannes Karl Alvin Georg

Die Schwalbe, 1933

8/3prp2/KR4pQ/1pPpk1b1/p2N2n1/4PP1B/2q5/B7

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Bf4
      • 2.Qxf4#
      • 2.exf4#
    • 1...Bh4
      • 2.Qf4#
    • 1...Bf6
      • 2.Qf4#
    • 1...Sf2
      • 2.Sc6#
    • 1...Sh2
      • 2.Sc6#
    • 1...Sf6
      • 2.Sc6#
    • 1...Sxh6
      • 2.Sc6#
  • Tries
    • 1.Sxc2+?
      • 1...Kf5
        • 2.Bxg4#
      • 1...d4!
    • 1.Sc6+?
      • 1...Kf5
        • 2.Bxg4#
      • 1...Ke6!
    • 1.Qxg5+?
      • 1...f5
        • 2.Qf4#
        • 2.Qxe7#
      • 1...Qf5!
    • 1.Qg7+?
      • 1...Sf6
        • 2.Sc6#
      • 1...f6
        • 2.Qxe7#
      • 1...Bf6!
    • 1.f4+?
      • 1...Bxf4
        • 2.Qxf4#
      • 1...Ke4!
  • Keys
    • 1.Rf6!
      • threat
        • 2.Sc6#
      • 1...Kxf6
        • 2.Qh8#
      • 1...Bxf6
        • 2.Qf4#
      • 1...Qb2
        • 2.Qxg5#
      • 1...Qc3
        • 2.Qxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • B(g);OGATE::QAB1(I)
    • S(c);::B(A)+S(E),DCHECK
    • S(c);SBLOCK::B(A)+S(E),DCHECK
    • S(c);XQ(I)::B(A)+S(E),DCHECK
  • Tries
    • Try
      • S(E);CHECK,XQ(a)
      • Vars
        • K(f);P-FLIGHT,P_SPINS(c),S_CUTP(e)::B(D),XS(c)
      • Refutation
        • P(e);P_SPINP(e)
    • Try
      • S(E);CHECK
      • Vars
        • K(f);P-FLIGHT,P_SPINS(c)::B(D),XS(c)
      • Refutation
        • K(f);P-FLIGHT,P_SPINP(h),P_SPINS(c)
    • Try
      • Q(I);CHECK,XB(g)
      • Refutation
        • Q(a);P_SPINQ(a)
    • Try
      • Q(I);CHECK
      • Vars
        • S(c);P_SPINS(c)::B(A)+S(E),DCHECK
        • P(k);OGATE,P_SPINP(k)::QAR2(I),XR(j)
      • Refutation
        • B(g);P_SPINB(g)
    • Try
      • P(C);CHECK
      • Vars
        • B(g);OGATE,XP(C)::QAB1(I),XB(g)
      • Refutation
        • K(f);P-FLIGHT
  • Actual
    • R(H);
    • Threat
      • B(A)+S(E),DCHECK
    • Vars
      • K(f);OGATEB,P_SPINP(h),S_FLIGHT,XR(H)::QAB(I)
      • B(g);OGATE,XR(H)::QAB1(I)
      • Q(a);N_GUARD::QAR2(I),XB(g)
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