MESON Chess Problem Database

Problem Display
PID: 177950 (B5n1/R4p2/8/8/Nk3P2/4N3/K4p1Q/6n1 w - - 0 1)

Zakharov, O

3rd Comm., Sahs (Latvia), 1989

B5n1/R4p2/8/8/Nk3P2/4N3/K4p1Q/6n1

#2

7 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...f1Q
      • 2.Qb2#
    • 1...f1S
      • 2.Qb2#
    • 1...f1B
      • 2.Qb2#
    • 1...f1R
      • 2.Qb2#
  • Tries
    • 1.Qxf2?
      • threat
        • 2.Qb2#
      • 1...Kb5
        • 2.Qb2#
      • 1...Se2!
    • 1.Qg2?
      • threat
        • 2.Qb7#
      • 1...Kb5
        • 2.Qb7#
      • 1...f1Q
        • 2.Qb2#
      • 1...f1B
        • 2.Qb2#
      • 1...Sf3!
    • 1.Qh8?
      • threat
        • 2.Qb2#
      • 1...Kb5
        • 2.Qb2#
      • 1...Sf6
        • 2.Qb8#
      • 1...f6!
  • Keys
    • 1.f5!
      • threat
        • 2.Qb8#
      • 1...Kb5
        • 2.Qb8#
      • 1...f1Q
        • 2.Qb2#
      • 1...f1B
        • 2.Qb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • P(b);OGATE::QAR2(B)
  • Tries
    • Try
      • Q(B);XP(b)
      • Threat
        • QAR2(B)
      • Vars
        • K(c);P-FLIGHT::QAR(B)
      • Refutation
        • S(a);
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • K(c);P-FLIGHT::QAR2(B)
        • P(b);OGATE::QAR2(B)
      • Refutation
        • S(a);
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Vars
        • K(c);P-FLIGHT::QAR(B)
        • S(e);OGATE::QAR(B)
      • Refutation
        • P(d);
  • Actual
    • P(E);
    • Threat
      • QAR(B)
    • Vars
      • K(c);P-FLIGHT::QAR(B)
      • P(b);OGATE::QAR2(B)
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