MESON Chess Problem Database

Problem Display
PID: 230141 (8/1N6/2B5/Pq5R/k1p5/n1P1N3/P7/2B1nK2 w - - 0 1)

Groeneveld, Cornelis

Zadachi i Etyudi, 2000

8/1N6/2B5/Pq5R/k1p5/n1P1N3/P7/2B1nK2

#2

9 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Bxb5#
    • 1...Sc2
      • 2.Bxb5#
  • Tries
    • 1.Sd1?
      • threat
        • 2.Sb2#
      • 1...Sb1
        • 2.Bxb5#
      • 1...Sac2
        • 2.Bxb5#
      • 1...Sd3!
    • 1.Rxb5?
      • threat
        • 2.Sc5#
        • 2.Rb4#
      • 1...Sd3
        • 2.Rb4#
      • 1...Sxb5!
  • Keys
    • 1.Sxc4!
      • threat
        • 2.Sc5#
      • 1...Qxc6
        • 2.Sb2#
      • 1...Sxc4
        • 2.Bxb5#
      • 1...Sd3
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(b);N_GUARD::B(H),XQ(e)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • S(b);N_GUARD::B(H),XQ(e)
      • Refutation
        • S(a);
    • Try
      • R(G);XQ(e)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::B(H)+R(G),DCHECK
      • Refutation
        • S(b);P_SPINS(b),XR(G)
  • Actual
    • S(E);P_SPINS(E),XP(d)
    • Threat
      • S(I)
    • Vars
      • Q(e);N_PINS(E),N_SPINQ(e),XB(H)::S(E)
      • S(b);N_GUARD,XS(E)::B(H),XQ(e)
      • S(a);N_PINS(E)::S(E)
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