MESON Chess Problem Database

Problem Display
PID: 176203 (8/8/8/8/5K1N/5p1p/2Q5/4N1k1 w - - 0 1)

Buglos, Janos

Schach-Echo, 1990

8/8/8/8/5K1N/5p1p/2Q5/4N1k1

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Kxf3?
      • 1...Kf1
        • 2.Qf2#
      • 1...h2
        • 2.Qg2#
      • 1...Kh1!
    • 1.Sexf3+?
      • 1...Kh1
        • 2.Qb1#
        • 2.Qd1#
        • 2.Qc1#
        • 2.Qh2#
      • 1...Kf1!
    • 1.Shxf3+?
      • 1...Kh1
        • 2.Qh2#
      • 1...Kf1!
  • Keys
    • 1.Qd1!
      • 1...Kf1
        • 2.Sd3#
      • 1...Kh1
        • 2.Sexf3#
      • 1...Kf2
        • 2.Sd3#
      • 1...Kh2
        • 2.Sexf3#
      • 1...f2
        • 2.Sef3#
      • 1...h2
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(C);P-FLIGHT,XP(b)
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
        • P(c);N_GUARD::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(A);CHECK,XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(D);CHECK,XP(b)
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(a);P-FLIGHT::QAR(B)+S(A)
      • K(a);P-FLIGHT::QAR(B)+S(A),XP(b)
      • K(a);S_FLIGHT::S(A)
      • K(a);S_FLIGHT::S(A),XP(b)
      • P(b);SBLOCK::QAR(B)+S(A),DCHECK
      • P(c);SBLOCK::QAR(B)+S(A)
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