MESON Chess Problem Database

Problem Display
PID: 89902 (n1Q3B1/2b5/8/4R3/1p3R2/1Nkb4/2p4K/2B3Nn w - - 0 1)

Lenassi, Aligi

Die Schwalbe, 1964

n1Q3B1/2b5/8/4R3/1p3R2/1Nkb4/2p4K/2B3Nn

#2

8 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qh3?
      • threat
        • 2.Se2#
        • 2.Rc5#
      • 1...Bxe5
        • 2.Se2#
      • 1...Bb6
        • 2.Se2#
      • 1...Bd6
        • 2.Se2#
      • 1...Sb6
        • 2.Se2#
      • 1...Sg3!
    • 1.Qxc7+?
      • 1...Bc4
        • 2.Rf3#
        • 2.Re3#
        • 2.Qxc4#
      • 1...Sxc7!
  • Keys
    • 1.Rf3!
      • threat
        • 2.Se2#
      • 1...Sg3
        • 2.Rc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(G);N_PINB(f),P_PINB(d)
      • Threat
        • DUALS(2)
      • Vars
        • B(f);P_PINR(E),XR(F)::S(B)
        • B(f);::S(B)
        • S(g);::S(B)
      • Refutation
        • S(a);N_SPINB(d)
    • Try
      • Q(G);CHECK,XB(f)
      • Refutation
        • S(g);XQ(G)
  • Actual
    • R(E);N_PINB(f),P_PINB(d),P_SPINR(F)
    • Threat
      • S(B)
    • Vars
      • S(a);N_PINR(F)::R(F)
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