MESON Chess Problem Database

Problem Display
PID: 264476 (3Nk3/3p1p2/1Q1K4/5P2/8/8/8/8 w - - 0 1)

Zimmer, Eligiusz

Schweizerische Schachzeitung, 2011

3Nk3/3p1p2/1Q1K4/5P2/8/8/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Qg1?
      • threat
        • 2.Qg8#
      • 1...Kxd8
        • 2.Qg8#
      • 1...Kf8!
    • 1.Qd4?
      • threat
        • 2.Qh8#
      • 1...Kxd8
        • 2.Qh8#
      • 1...Kf8
        • 2.Qh8#
      • 1...f6!
    • 1.Qb2?
      • threat
        • 2.Qh8#
      • 1...Kxd8
        • 2.Qh8#
        • 2.Qb8#
      • 1...Kf8
        • 2.Qh8#
      • 1...f6!
    • 1.Qb8?
      • threat
        • 2.Sc6#
        • 2.Se6#
        • 2.Sb7#
      • 1...Kf8
        • 2.Se6#
      • 1...f6!
  • Keys
    • 1.Qb3!
      • 1...Kxd8
        • 2.Qb8#
      • 1...Kf8
        • 2.Qxf7#
      • 1...f6
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Vars
        • K(c);P-FLIGHT,XS(D)::QAR(B)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • K(c);P-FLIGHT,XS(D)::QAR(B)
        • K(c);P-FLIGHT::QAR2(B)
      • Refutation
        • P(b);
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • K(c);P-FLIGHT::QAR2(B)
      • Refutation
        • P(b);
    • Try
      • Q(B);
      • Threat
        • DUALS(3)
      • Vars
        • K(c);P-FLIGHT::QAR(B)+S(D),DCHECK
      • Refutation
        • P(b);
  • Actual
    • Q(B);
    • Vars
      • K(c);OGATEB,P-FLIGHT,XS(D)::QAR2(B)
      • K(c);N_GUARD,P-FLIGHT::QAR1(B),XP(b)
      • P(b);OGATE::QAR2(B)
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