MESON Chess Problem Database

Problem Display
PID: 494 (Q7/2n4K/7B/4R3/8/1N4n1/1kP5/N6R w - - 0 1)

Garaza, Luis Alberto

The Observer, 1957

(First published on Sun Sep 22 1957)

Q7/2n4K/7B/4R3/8/1N4n1/1kP5/N6R

#2

8 + 3

17397 Ling Notebooks 2023

SOLUTION

  • SOUND
  • Tries
    • 1.Bc1+?
      • 1...Kb1
        • 2.Sd2#
      • 1...Kc3!
    • 1.Qa3+?
      • 1...Kc3
        • 2.Rc5#
      • 1...Kxa3!
  • Keys
    • 1.Bg7!
      • threat
        • 2.Ree1#
        • 2.Re2#
        • 2.Re3#
        • 2.Re4#
        • 2.Ra5#
        • 2.Rb5#
        • 2.Rc5#
        • 2.Rd5#
        • 2.Rf5#
        • 2.Rg5#
        • 2.Reh5#
        • 2.Re6#
        • 2.Re7#
        • 2.Re8#
      • 1...Kc3
        • 2.Re4#
      • 1...Sxh1
        • 2.Re1#
      • 1...Sxa8
        • 2.Ra5#
      • 1...Sf1
        • 2.Re1#
      • 1...Sa6
        • 2.Ra5#
      • 1...Se2
        • 2.Rxe2#
      • 1...Se4
        • 2.Rxe4#
      • 1...Sf5
        • 2.Rxf5#
      • 1...Sh5
        • 2.Rexh5#
      • 1...Sb5
        • 2.Rxb5#
      • 1...Sd5
        • 2.Rxd5#
      • 1...Se6
        • 2.Rxe6#
      • 1...Se8
        • 2.Rxe8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 13
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(F);CHECK
      • Vars
        • K(a);P-FLIGHT::S(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • K(a);S_FLIGHT::R(E)
      • Refutation
        • K(a);S_FLIGHT,XQ(H)
  • Actual
    • B(F);
    • Threat
      • DUALS(14)
    • Vars
      • K(a);S_FLIGHT::B(F)+R(E)
      • S(b);XR(B)::B(F)+R(E)
      • S(c);XQ(H)::B(F)+R(E)
      • S(b);::B(F)+R(E)
      • S(c);::B(F)+R(E)
      • S(b);::B(F)+R(E),XS(b)
      • S(c);::B(F)+R(E),XS(c)
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