MESON Chess Problem Database

Problem Display
PID: 110563 (5b1N/1KQ3n1/3P1nR1/4kr2/8/4P3/BN6/B4r2 w - - 0 1)

Apro, Laszlo

Tipografia TE, 1969

5b1N/1KQ3n1/3P1nR1/4kr2/8/4P3/BN6/B4r2

#2

9 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Se4
      • 2.Sd3#
  • Tries
    • 1.Sc4+?
      • 1...Kd5
        • 2.Sd2#
      • 1...Ke6
        • 2.Se5#
        • 2.Qf7#
      • 1...Ke4!
    • 1.Qa5+?
      • 1...Kxd6
        • 2.Qc7#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Ke4!
    • 1.Qc3+?
      • 1...Kxd6
        • 2.Qc7#
      • 1...Ke4!
    • 1.Qc5+?
      • 1...Sd5
        • 2.Qd4#
        • 2.Qxd5#
      • 1...Ke4!
    • 1.Qe7+?
      • 1...Se6
        • 2.Qxe6#
      • 1...Bxe7!
  • Keys
    • 1.Qc2!
      • threat
        • 2.Sf7#
      • 1...Kxd6
        • 2.Qc7#
      • 1...Se4
        • 2.Sd3#
      • 1...Sg4
        • 2.Sd1#
      • 1...Sd5
        • 2.Sc4#
      • 1...Sfh5
        • 2.Sd1#
      • 1...Sd7
        • 2.Sd1#
      • 1...Sh7
        • 2.Sd1#
      • 1...Sfe8
        • 2.Sd1#
      • 1...Sg8
        • 2.Sd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • S(d);SBLOCK::B(A)+S(C),DCHECK
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(b);P-FLIGHT::B(B)+S(C)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • K(b);OGATEB,P_SPINS(d),S_FLIGHT,XP(E)::QAB1(H)
        • S(d);N_GUARD,P_SPINS(d)::QAR1(H),XS(d)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • K(b);OGATEB,P_SPINS(d),S_FLIGHT,XP(E)::QAB1(H)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(H);CHECK
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAR1(H),XS(e)
      • Refutation
        • B(f);XQ(H)
  • Actual
    • Q(H);
    • Threat
      • S(I)
    • Vars
      • K(b);OGATEB,P_SPINS(d),S_FLIGHT,XP(E)::QAB1(H)
      • S(d);SBLOCK::B(A)+S(C),DCHECK
      • S(d);::B(A)+S(C)
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