MESON Chess Problem Database

Problem Display
PID: 33371 (4N2n/5pq1/1N1Bkrp1/K1R5/2bPrb1Q/4n3/8/1B6 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Die Schwalbe, 1951

4N2n/5pq1/1N1Bkrp1/K1R5/2bPrb1Q/4n3/8/1B6

#2

8 + 10

3105 FIDE Album (1945-1955) 1964
15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Qh6
      • 2.Qxf6#
    • 1...Qf8
      • 2.Qxf6#
    • 1...Qh7
      • 2.Qxf6#
    • 1...Qg8
      • 2.Qxf6#
    • 1...Rf5
      • 2.Qe7#
    • 1...Bg5
      • 2.Qxe4#
    • 1...Bh6
      • 2.Qxe4#
  • Tries
    • 1.Bf8?
      • threat
        • 2.Sxg7#
      • 1...Qxf8
        • 2.Qxf6#
      • 1...Qh6
        • 2.Qxf6#
      • 1...Qh7
        • 2.Qxf6#
      • 1...Qg8
        • 2.Qxf6#
      • 1...Bh6
        • 2.Sc7#
        • 2.Qxe4#
      • 1...Sf5!
  • Keys
    • 1.Rc6!
      • threat
        • 2.Sxg7#
      • 1...Re5+
        • 2.Bc5#
      • 1...Rf5+
        • 2.Be5#
      • 1...Kf5
        • 2.Sxg7#
      • 1...Bxd6
        • 2.Qxe4#
      • 1...Qh6
        • 2.Qxf6#
      • 1...Qf8
        • 2.Qxf6#
      • 1...Qh7
        • 2.Qxf6#
      • 1...Qg8
        • 2.Qxf6#
      • 1...Bh6
        • 2.Qxe4#
      • 1...Sf5
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • Q(i);N_GUARD::QAR1(C),XR(f)
    • R(f);OGATE,P_PINR(E)::QAR1(C)
    • B(d);OGATE::QAR2(C),XR(c)
  • Tries
    • Try
      • B(G);
      • Threat
        • S(H),XQ(i)
      • Vars
        • Q(i);N_GUARD,XB(G)::QAR1(C),XR(f)
        • Q(i);N_GUARD::QAR1(C),XR(f)
      • Refutation
        • S(a);
  • Actual
    • R(E);
    • Threat
      • S(H),XQ(i)
    • Vars
      • R(c);CHECK,S_CUTB(d)::R(E)+B(G)
      • R(f);CHECK,SBLOCK::R(E)+B(G)
      • K(e);P_SPINR(c),S_FLIGHT::S(H),XQ(i)
      • B(d);OGATE,P_SPINB(d),XB(G)::QAR2(C),XR(c)
      • Q(i);N_GUARD::QAR1(C),XR(f)
      • B(d);OGATE::QAR2(C),XR(c)
      • S(a);SBLOCK::S(H)
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