MESON Chess Problem Database

Problem Display
PID: 196606 (1NB5/2B5/r2P2r1/p1Knk1pN/Qp4P1/1p1PP3/8/bb6 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Suomen Shakki, 1985

1NB5/2B5/r2P2r1/p1Knk1pN/Qp4P1/1p1PP3/8/bb6

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rc6+
      • 2.Sxc6#
    • 1...Raxd6
      • 2.Sc6#
    • 1...Ra7
      • 2.Sc6#
    • 1...Ra8
      • 2.Sc6#
    • 1...Re6
      • 2.Sd7#
    • 1...Bd4+
      • 2.exd4#
    • 1...Sb6
      • 2.Sc6#
  • Tries
    • 1.Qxb3?
      • threat
        • 2.Qxd5#
      • 1...Rc6+
        • 2.Sxc6#
      • 1...Bd4+
        • 2.exd4#
      • 1...Sxe3
        • 2.Sd7#
      • 1...Sxc7
        • 2.Sd7#
      • 1...Sc3
        • 2.Sd7#
      • 1...Sf4
        • 2.Sd7#
      • 1...Sb6
        • 2.Sc6#
      • 1...Sf6
        • 2.Qe6#
      • 1...Se7
        • 2.Sd7#
      • 1...Ba2!
    • 1.Qe8+?
      • 1...Re6
        • 2.Sd7#
        • 2.Qxe6#
      • 1...Se7!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Qxd5#
      • 1...Rxc6+
        • 2.Sxc6#
      • 1...Bd4+
        • 2.exd4#
      • 1...Sxe3
        • 2.Qe4#
      • 1...Sxc7
        • 2.Qe4#
      • 1...Sc3
        • 2.d4#
      • 1...Sf4
        • 2.Qe4#
      • 1...Sb6
        • 2.Qe4#
      • 1...Sf6
        • 2.d7#
      • 1...Se7
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 4
  • Sets
    • R(i);CHECK,N_GUARD::S(I),XR(i)
    • R(i);N_GUARD,P_SPINR(i),XP(G)::S(I)
    • R(i);N_GUARD::S(I)
    • R(j);SBLOCK::S(I)
    • B(a);CHECK,OGATE::P(B),XB(a)
    • S(f);S_CUTR(i)::S(I)
  • Tries
    • Try
      • Q(C);XP(c)
      • Threat
        • QAR1(C),XS(f)
      • Vars
        • R(i);CHECK,N_GUARD::S(I),XR(i)
        • B(a);CHECK,OGATE::P(B),XB(a)
        • S(f);XP(B)::S(I)
        • S(f);XB(H)::S(I)
        • S(f);::S(I)
        • S(f);S_CUTR(i)::S(I)
        • S(f);OGATE::QAR1(C)
      • Refutation
        • B(b);
    • Try
      • Q(C);CHECK
      • Refutation
        • S(f);P_SPINS(f)
  • Actual
    • Q(C);
    • Threat
      • QAR1(C),XS(f)
    • Vars
      • R(i);CHECK,XQ(C)::S(I),XR(i)
      • B(a);CHECK,OGATE::P(B),XB(a)
      • S(f);OGATE,XP(B)::QAR1(C)
      • S(f);OGATE,XB(H)::QAR1(C)
      • S(f);S_CUTB(a)::P(A)
      • S(f);OGATE::QAR1(C)
      • S(f);N_GUARD,S_CUTR(j)::B(H)+P(G)
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