MESON Chess Problem Database

Problem Display
PID: 142236 (8/1Kb5/2N1p3/1p6/1Bk5/1pNp4/8/1Q6 w - - 0 1)

di Scala, Pascal

Phenix, 1989

8/1Kb5/2N1p3/1p6/1Bk5/1pNp4/8/1Q6

#2

5 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...b2
      • 2.Qa2#
    • 1...d2
      • 2.Qe4#
      • 2.Qf1#
  • Tries
    • 1.Kxc7?
      • 1...b2
        • 2.Qa2#
      • 1...d2
        • 2.Qe4#
        • 2.Qf1#
      • 1...e5!
    • 1.Qe1?
      • threat
        • 2.Qe4#
        • 2.Qxe6#
      • 1...b2
        • 2.Qxe6#
      • 1...d2
        • 2.Qf1#
        • 2.Qe2#
        • 2.Qe4#
      • 1...Bb6
        • 2.Qxe6#
      • 1...e5
        • 2.Qe4#
      • 1...Be5!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Se3#
      • 1...Kxd5
        • 2.Qxd3#
      • 1...exd5
        • 2.Qc1#
      • 1...b2
        • 2.Qa2#
      • 1...Bf4
        • 2.Sb6#
      • 1...Bb6
        • 2.Sxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATEB::QAB(A)
  • Tries
    • Try
      • K(E);P-FLIGHT,XB(f)
      • Vars
        • P(a);OGATEB::QAB(A)
      • Refutation
        • P(e);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);::QAB(A),XP(e)
        • B(f);::QAB(A),XP(e)
        • P(e);::QAR2(A)
      • Refutation
        • B(f);
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • K(c);S_FLIGHT,XS(B)::QAR2(A),XP(b)
      • P(e);SBLOCK,XS(B)::QAR(A)
      • P(a);OGATEB::QAB(A)
      • B(f);N_GUARD::S(B)
      • B(f);N_GUARD::S(B),XB(f)
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