MESON Chess Problem Database

Problem Display
PID: 155309 (1B4N1/1N1B4/r4b2/3k2nR/p2p3p/3Q4/K3Pp2/5b1q w - - 0 1)

Ahues, Herbert Siegfried Oskar

Der Tagesspiegel (Berlin), 2000

1B4N1/1N1B4/r4b2/3k2nR/p2p3p/3Q4/K3Pp2/5b1q

#2

8 + 10

15391 Problemschach-Jahrbuch (2000) 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Qb5#
    • 1...Qg1
      • 2.e4#
    • 1...Qh2
      • 2.e4#
    • 1...Qh3
      • 2.e4#
    • 1...Ra5
      • 2.Sxf6#
    • 1...Ra7
      • 2.Sxf6#
    • 1...Ra8
      • 2.Sxf6#
    • 1...Be5
      • 2.Se7#
    • 1...Be7
      • 2.Sxe7#
    • 1...Bg7
      • 2.Se7#
    • 1...Bh8
      • 2.Se7#
  • Tries
    • 1.Rxg5+?
      • 1...Be5
        • 2.Se7#
        • 2.Rxe5#
      • 1...Bxg5!
    • 1.Qf5+?
      • 1...Kc4
        • 2.Qc5#
      • 1...Be5!
    • 1.Qb3+?
      • 1...Ke4
        • 2.Sc5#
      • 1...axb3+!
  • Keys
    • 1.Be5!
      • threat
        • 2.Qxd4#
      • 1...Kxe5
        • 2.Qf5#
      • 1...Bxe5
        • 2.Se7#
      • 1...Qe4
        • 2.Qb5#
      • 1...Sf3
        • 2.e4#
      • 1...Se6
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • Q(b);SBLOCK::QAR2(C)
    • Q(b);N_GUARD::P(B)
    • R(i);N_GUARD::S(H),XB(j)
    • B(j);N_GUARD,N_SPINS(h)::S(H)
    • B(j);N_GUARD::S(H),XB(j)
    • B(j);N_GUARD::S(H)
  • Tries
    • Try
      • R(D);CHECK,XS(h)
      • Refutation
        • B(j);XR(D)
    • Try
      • Q(C);CHECK,N_PINP(e),N_PINS(h)
      • Vars
        • K(g);OGATE,S_FLIGHT::QAR1(C)
      • Refutation
        • B(j);P_SPINB(j)
    • Try
      • Q(C);CHECK,N_PINP(e)
      • Vars
        • K(g);N_SPINS(h),S_FLIGHT::S(E)
      • Refutation
        • P(d);CHECK,XQ(C)
  • Actual
    • B(G);N_PINS(h)
    • Threat
      • QAR1(C),XP(e)
    • Vars
      • K(g);N_SPINP(e),OGATEB,P-FLIGHT,P_SPINS(h),XB(G)::QAR1(C)
      • B(j);N_GUARD,SBLOCK,XB(G)::S(H)
      • Q(b);SBLOCK::QAR2(C)
      • S(h);N_GUARD,S_CUTQ(b)::P(B)
      • S(h);S_CUTR(i)::S(H),XB(j)
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