MESON Chess Problem Database

Problem Display
PID: 82126 (4Q3/1p6/b7/2Np4/pKnk2p1/2RN1pq1/8/6b1 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Problemas, 1965

4Q3/1p6/b7/2Np4/pKnk2p1/2RN1pq1/8/6b1

#2

5 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...a3
      • 2.Sb3#
  • Tries
    • 1.Sf4?
      • threat
        • 2.Rd3#
      • 1...Sb2
        • 2.Qh8#
      • 1...Sd2
        • 2.Qh8#
      • 1...Sa3
        • 2.Qh8#
      • 1...Se3
        • 2.Qh8#
      • 1...Sa5
        • 2.Qh8#
      • 1...Se5
        • 2.Sfe6#
      • 1...Sb6
        • 2.Qh8#
      • 1...Sd6
        • 2.Qh8#
      • 1...f2
        • 2.Se2#
      • 1...Qe1!
    • 1.Rxc4+?
      • 1...dxc4
        • 2.Qe4#
      • 1...Bxc4!
  • Keys
    • 1.Sf2!
      • threat
        • 2.Rd3#
      • 1...Sb2
        • 2.Qe3#
      • 1...Sd2
        • 2.Qe3#
      • 1...Sa3
        • 2.Qe3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sa5
        • 2.Qe3#
      • 1...Se5
        • 2.Se6#
      • 1...Sb6
        • 2.Qe3#
      • 1...Sd6
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • P(d);N_GUARD::S(D)
  • Tries
    • Try
      • S(B);
      • Threat
        • R1(A)
      • Vars
        • S(e);N_GUARD::QAB(E)
        • S(e);SBLOCK::S(B)
        • P(b);N_GUARD::S(B)
      • Refutation
        • Q(c);P_PINR(A)
    • Try
      • R(A);CHECK,XS(e)
      • Vars
        • P(h);XR(A)::QAR1(E)
      • Refutation
        • B(i);XR(A)
  • Actual
    • S(B);
    • Threat
      • R1(A)
    • Vars
      • S(e);N_GUARD::QAB1(E)
      • S(e);N_GUARD::QAB1(E),XS(e)
      • S(e);SBLOCK::S(D)
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