MESON Chess Problem Database

Problem Display
PID: 81955 (3Nn1b1/7q/R2P1b2/2pkp1Pr/2n3B1/1Q1p1P2/KB6/8 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Die Schwalbe, 1963

3Nn1b1/7q/R2P1b2/2pkp1Pr/2n3B1/1Q1p1P2/KB6/8

#2

9 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Qb7#
    • 1...Qf5
      • 2.Qb7#
    • 1...Qg6
      • 2.Qb7#
    • 1...Qh6
      • 2.Qxd3#
      • 2.Qb7#
    • 1...Qa7
      • 2.Qxd3#
    • 1...Qb7
      • 2.Qxd3#
      • 2.Qxb7#
    • 1...Qc7
      • 2.Qxd3#
    • 1...Qd7
      • 2.Qxd3#
    • 1...Qe7
      • 2.Qxd3#
    • 1...Qf7
      • 2.Qxd3#
    • 1...Qg7
      • 2.Qxd3#
    • 1...Qh8
      • 2.Qxd3#
      • 2.Qb7#
    • 1...Be7
      • 2.Qb7#
    • 1...Bg7
      • 2.Qb7#
    • 1...Be6
      • 2.Bxe6#
    • 1...Bf7
      • 2.Qb7#
    • 1...Sc7
      • 2.Qb7#
    • 1...Sg7
      • 2.Qb7#
  • Tries
    • 1.Sf7?
      • threat
        • 2.Qb7#
      • 1...Qxf7
        • 2.Qxd3#
      • 1...Sxd6
        • 2.Rxd6#
      • 1...Qf5!
    • 1.Bf5?
      • threat
        • 2.Qxd3#
      • 1...Qxf5
        • 2.Qb7#
      • 1...d2
        • 2.Qd3#
      • 1...e4
        • 2.fxe4#
      • 1...Rh4!
    • 1.g6?
      • threat
        • 2.Qxd3#
      • 1...Qxg6
        • 2.Qb7#
      • 1...d2
        • 2.Qd3#
      • 1...e4!
    • 1.d7?
      • threat
        • 2.Qb7#
      • 1...Qxd7
        • 2.Qxd3#
      • 1...Sd6!
  • Keys
    • 1.Bd7!
      • threat
        • 2.Qb7#
      • 1...Qxd7
        • 2.Qxd3#
      • 1...Sxd6
        • 2.Bc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 14
  • Sets
    • Q(h);N_GUARD::QAB(C)
    • Q(h);N_GUARD,P_PINR(G)::QAR2(C),XP(a)
    • Q(h);N_GUARD::QAR2(C),XP(a)
    • B(g);S_CUTQ(h)::QAB(C)
    • B(j);N_GUARD::B(E),XB(j)
    • B(j);S_CUTQ(h)::QAB(C)
    • S(i);S_CUTQ(h)::QAB(C)
  • Tries
    • Try
      • S(I);
      • Threat
        • QAB(C)
      • Vars
        • Q(h);N_GUARD,XS(I)::QAR2(C),XP(a)
        • S(i);OGATE,XP(H)::R1(G),XS(i)
      • Refutation
        • Q(h);
    • Try
      • B(E);
      • Threat
        • QAR2(C),XP(a)
      • Vars
        • Q(h);N_GUARD,XB(E)::QAB(C)
        • P(a);::QAR2(C)
        • P(e);OGATE::P(D),XP(e)
      • Refutation
        • R(f);
    • Try
      • P(F);
      • Threat
        • QAR2(C),XP(a)
      • Vars
        • Q(h);N_GUARD,XP(F)::QAB(C)
        • P(a);::QAR2(C)
      • Refutation
        • P(e);
    • Try
      • P(H);
      • Threat
        • QAB(C)
      • Vars
        • Q(h);N_GUARD,XP(H)::QAR2(C),XP(a)
      • Refutation
        • S(i);
  • Actual
    • B(E);
    • Threat
      • QAB(C)
    • Vars
      • Q(h);N_GUARD,XB(E)::QAR2(C),XP(a)
      • S(i);SBLOCK,XP(H)::B(E)
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