MESON Chess Problem Database

Problem Display
PID: 56585 (2Nk4/1KRNpB2/1PP3r1/8/8/3R4/7q/8 w - - 0 1)

Heyl, Peter

Die Schwalbe, 2004

2Nk4/1KRNpB2/1PP3r1/8/8/3R4/7q/8

#2

8 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc7+
      • 2.bxc7#
    • 1...Qh6
      • 2.Sf6#
    • 1...Qh7
      • 2.Sf6#
    • 1...Qh8
      • 2.Sf6#
    • 1...Rg1
      • 2.Se5#
    • 1...Rg2
      • 2.Se5#
    • 1...Rg5
      • 2.Se5#
    • 1...Rg7
      • 2.Se5#
    • 1...Rg8
      • 2.Se5#
    • 1...e5
      • 2.Sf6#
    • 1...e6
      • 2.Se5#
  • Tries
    • 1.Sc5+?
      • 1...Rd6
        • 2.Se6#
      • 1...Qd6!
    • 1.Sf8+?
      • 1...Rd6
        • 2.Se6#
      • 1...Qd6!
  • Keys
    • 1.Sa7!
      • threat
        • 2.Rc8#
      • 1...Qxc7+
        • 2.bxc7#
      • 1...Rxc6
        • 2.Sxc6#
      • 1...e5
        • 2.Sf6#
      • 1...e6
        • 2.Se5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • Q(a);CHECK,OGATE,XR(E)::P(B),XQ(a)
    • Q(a);N_GUARD::R(A)+S(F)
    • R(b);N_GUARD::R(A)+S(F)
    • P(c);S_CUTQ(a)::R(A)+S(F)
    • P(c);S_CUTR(b)::R(A)+S(F)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • R(b);P_SPINR(b)::S(F)
      • Refutation
        • Q(a);P_SPINQ(a)
    • Try
      • S(F);CHECK
      • Vars
        • R(b);P_SPINR(b)::S(F)
      • Refutation
        • Q(a);P_SPINQ(a)
  • Actual
    • S(H);
    • Threat
      • R1(E)
    • Vars
      • Q(a);CHECK,OGATE,XR(E)::P(B),XQ(a)
      • R(b);XP(C)::S(H),XR(b)
      • P(c);S_CUTQ(a)::R(A)+S(F)
      • P(c);S_CUTR(b)::R(A)+S(F)
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