MESON Chess Problem Database

Problem Display
PID: 232470 (Q7/8/2KPN3/2Pr1PP1/2N1k3/5p1B/2PB4/8 w - - 0 1)

Dikusarov, Andrey Nikolayovich

Freie Presse, 2008

Q7/8/2KPN3/2Pr1PP1/2N1k3/5p1B/2PB4/8

#2

11 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc5+
      • 2.Kxc5#
    • 1...Rxd6+
      • 2.Kxd6#
  • Tries
    • 1.Qh8?
      • threat
        • 2.Qh4#
      • 1...Rxc5+
        • 2.Sxc5#
      • 1...Rxd6+
        • 2.Sxd6#
      • 1...Rxf5
        • 2.Qd4#
      • 1...f2!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qe1#
      • 1...Rxc5+
        • 2.Sxc5#
      • 1...Rxd6+
        • 2.Sxd6#
      • 1...Rxd2
        • 2.Qe5#
      • 1...f2
        • 2.Qh1#
      • 1...Rd3
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(c);CHECK,XP(E)::QAB(K)+K(H),XR(c)
    • R(c);CHECK,XP(I)::QAB(K)+K(H),XR(c)
  • Tries
    • Try
      • Q(K);
      • Threat
        • QAR(K)
      • Vars
        • R(c);CHECK,XP(E)::S(J),XR(c)
        • R(c);CHECK,XP(I)::S(D),XR(c)
        • R(c);N_GUARD,XP(F)::QAR1(K)
      • Refutation
        • P(a);
  • Actual
    • Q(K);
    • Threat
      • QAR(K)
    • Vars
      • R(c);CHECK,XP(E)::S(J),XR(c)
      • R(c);CHECK,XP(I)::S(D),XR(c)
      • R(c);N_GUARD,XB(B)::QAR1(K)
      • P(a);OGATEB::QAB(K)
      • R(c);N_GUARD::QAR1(K)
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