MESON Chess Problem Database

Problem Display
PID: 75903 (K7/5Q1b/2ppn3/3k3p/N1p1p2b/2B1R3/3P4/3B1N2 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Die Schwalbe, 2007

K7/5Q1b/2ppn3/3k3p/N1p1p2b/2B1R3/3P4/3B1N2

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bf5
      • 2.Qxf5#
    • 1...Bg8
      • 2.Qf5#
    • 1...c5
      • 2.Qb7#
  • Tries
    • 1.Bg4?
      • threat
        • 2.Bxe6#
        • 2.Qxe6#
      • 1...c5
        • 2.Qb7#
      • 1...Bf5
        • 2.Qxf5#
      • 1...Bg8
        • 2.Bxe6#
        • 2.Qf5#
      • 1...hxg4!
    • 1.Rd3+?
      • 1...cxd3
        • 2.Se3#
        • 2.Bb3#
      • 1...exd3!
    • 1.Qxh7?
      • threat
        • 2.Qxe4#
        • 2.Qf5#
      • 1...Sd4
        • 2.Qxe4#
      • 1...Sc5
        • 2.Qf5#
      • 1...Sg5
        • 2.Qf5#
      • 1...Sg7
        • 2.Qxe4#
      • 1...c5
        • 2.Qxe4#
        • 2.Qb7#
      • 1...Bg3
        • 2.Qxe4#
      • 1...Bf6
        • 2.Qxe4#
      • 1...Sc7+!
    • 1.d4?
      • threat
        • 2.Sb6#
      • 1...cxd4 ep
        • 2.Bb3#
      • 1...exd4 ep
        • 2.Qxe6#
      • 1...c5
        • 2.Qb7#
      • 1...Bd8!
  • Keys
    • 1.Rxe4!
      • threat
        • 2.Qxe6#
      • 1...Kxe4
        • 2.Qf3#
      • 1...Bxe4
        • 2.Se3#
      • 1...c5
        • 2.Qb7#
      • 1...Bf5
        • 2.Qxf5#
      • 1...Bg8
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(i);N_GUARD::QAR2(G),XB(i)
    • B(i);N_GUARD::QAR2(G)
    • P(f);OGATEB::QAB(G)
  • Tries
    • Try
      • B(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(f);OGATEB::QAB(G)
        • B(i);N_GUARD::QAR2(G),XB(i)
      • Refutation
        • P(e);XB(A)
    • Try
      • R(E);CHECK
      • Refutation
        • P(b);XR(E)
    • Try
      • Q(G);N_PINS(h),XB(i)
      • Threat
        • DUALS(2)
      • Vars
        • S(h);::QAB1(G),XP(b)
        • S(h);::QAR2(G)
        • B(c);::QAB1(G),XP(b)
      • Refutation
        • S(h);CHECK
    • Try
      • P(C);
      • Threat
        • S(F)
      • Vars
        • P(a);EP,OGATEB,XP(C)::B(A)
        • P(b);EP,XP(C)::QAB1(G),XS(h)
        • P(f);OGATEB::QAB(G)
      • Refutation
        • B(c);
  • Actual
    • R(E);XP(b)
    • Threat
      • QAB1(G),XS(h)
    • Vars
      • K(d);N_SPINS(h),OGATEB,S_FLIGHT,XR(E)::QAB1(G)
      • B(i);SBLOCK,XR(E)::S(B)
      • P(f);OGATEB::QAB(G)
      • B(i);N_GUARD::QAR2(G),XB(i)
      • B(i);N_GUARD::QAR2(G)
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