MESON Chess Problem Database

Problem Display
PID: 232893 (3k4/3p1K2/n7/2R5/8/3Q3n/8/8 w - - 0 1)

Dikusarov, Andrey Nikolayovich

Kudesnik, 2005

3k4/3p1K2/n7/2R5/8/3Q3n/8/8

#2

3 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...d5
      • 2.Qxd5#
    • 1...d6
      • 2.Qxd6#
  • Tries
    • 1.Qxa6?
      • threat
        • 2.Rc8#
        • 2.Qc8#
        • 2.Qa5#
        • 2.Qb6#
        • 2.Qf6#
        • 2.Qa8#
      • 1...d5
        • 2.Qc8#
        • 2.Qd6#
      • 1...d6
        • 2.Qc8#
        • 2.Qxd6#
      • 1...Sg5+!
    • 1.Qd6?
      • threat
        • 2.Qe7#
        • 2.Qf8#
        • 2.Qf6#
      • 1...Sxc5
        • 2.Qb8#
      • 1...Sc7
        • 2.Qxc7#
      • 1...Sg5+!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Qg8#
      • 1...Sg5+
        • 2.Qxg5#
      • 1...Sxc5
        • 2.Qb8#
      • 1...Sc7
        • 2.Qxc7#
      • 1...d5
        • 2.Qd6#
      • 1...d6
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATEB::QAR(A),XP(c)
    • P(c);OGATEB::QAR2(A),XP(c)
  • Tries
    • Try
      • Q(A);N_PINP(c),XS(b)
      • Threat
        • DUALS(6)
      • Refutation
        • S(a);CHECK
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • S(b);N_GUARD,XR(B)::QAR2(A)
        • S(b);N_GUARD::QAB1(A),XS(b)
      • Refutation
        • S(a);CHECK
  • Actual
    • Q(A);N_PINP(c)
    • Threat
      • QAR(A)
    • Vars
      • S(a);CHECK,N_GUARD::QAB(A),XS(a)
      • S(b);N_GUARD,XR(B)::QAR2(A)
      • S(b);N_GUARD::QAB1(A),XS(b)
      • P(c);OGATEB::QAR2(A)
      • P(c);OGATEB::QAR2(A),XP(c)
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