MESON Chess Problem Database

Problem Display
PID: 90188 (8/2Q2K2/3N4/2pk1N2/5b1R/8/3nB3/8 w - - 0 1)

Wielgos, Oskar

Die Schwalbe, 1983

8/2Q2K2/3N4/2pk1N2/5b1R/8/3nB3/8

#2

6 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Qxc5#
    • 1...Be5
      • 2.Se3#
      • 2.Se7#
      • 2.Qb7#
    • 1...Bxd6
      • 2.Qxd6#
  • Tries
    • 1.Se7+?
      • 1...Ke5
        • 2.Qxc5#
      • 1...Kd4!
    • 1.Bc4+?
      • 1...Ke5
        • 2.Qxc5#
        • 2.Qe7#
      • 1...Sxc4!
    • 1.Qc6+?
      • 1...Ke5
        • 2.Qxc5#
      • 1...Kxc6!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Qb7#
      • 1...Ke4
        • 2.Qe5#
      • 1...Bxc7
        • 2.Se7#
      • 1...Sxc4
        • 2.Bf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • K(d);P-FLIGHT::QAR2(E),XP(c)
    • B(b);OGATE,XS(D)::QAR1(E),XB(b)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(d);P-FLIGHT::QAR2(E),XP(c)
      • Refutation
        • K(d);P-FLIGHT,P_SPINB(b)
    • Try
      • B(A);CHECK
      • Refutation
        • S(a);XB(A)
    • Try
      • Q(E);CHECK
      • Vars
        • K(d);P-FLIGHT::QAR2(E),XP(c)
      • Refutation
        • K(d);S_FLIGHT,XQ(E)
  • Actual
    • S(D);
    • Threat
      • QAB(E)
    • Vars
      • K(d);P_SPINB(b),S_FLIGHT::QAR1(E)
      • B(b);XQ(E)::S(C)
      • S(a);N_GUARD,SBLOCK,XS(D)::B(A)
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