MESON Chess Problem Database

Problem Display
PID: 178204 (k1K5/1p6/p4n2/1N6/8/3Q4/8/8 w - - 0 1)

Parkhomenko, Nikolai A

Vratnica-64, 2004

k1K5/1p6/p4n2/1N6/8/3Q4/8/8

#2

3 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...axb5
      • 2.Qa3#
  • Tries
    • 1.Qe3?
      • threat
        • 2.Sc7#
        • 2.Qa7#
      • 1...axb5
        • 2.Qa3#
      • 1...Sd5
        • 2.Qa7#
      • 1...Se8
        • 2.Qa7#
      • 1...b6!
    • 1.Qd4?
      • threat
        • 2.Sc7#
        • 2.Qa7#
      • 1...axb5
        • 2.Qa1#
      • 1...Sd5
        • 2.Qa7#
      • 1...Se8
        • 2.Qa7#
      • 1...b6!
    • 1.Qd7?
      • threat
        • 2.Qxb7#
      • 1...b6
        • 2.Qc6#
        • 2.Qa7#
        • 2.Qb7#
      • 1...Sxd7!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Kc7#
      • 1...axb5
        • 2.Qa5#
      • 1...Sd5
        • 2.Kd7#
      • 1...Sd7
        • 2.Kxd7#
      • 1...Se8
        • 2.Kd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATEB,XS(B)::QAR(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);OGATEB,XS(B)::QAR(A)
        • S(b);::QAR1(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);OGATEB,XS(B)::QAB(A)
        • S(b);::QAR1(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Threat
        • QAB1(A),XP(c)
      • Refutation
        • S(b);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR(A)+K(C)
    • Vars
      • P(a);OGATEB,XS(B)::QAR(A)
      • S(b);::QAR(A)+K(C)
      • S(b);::QAR(A)+K(C),XS(b)
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