MESON Chess Problem Database

Problem Display
PID: 386 (8/1R4nr/2Nk4/3P2R1/K2P4/7b/B7/5r2 w - - 0 1)

Rains, Cyril George

The Observer, 1939

(First published on Sun Sep 10 1939)

8/1R4nr/2Nk4/3P2R1/K2P4/7b/B7/5r2

#2

7 + 5

3310 2345 Chess Problems 1997
15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sf5
      • 2.Rg6#
  • Keys
    • 1.Se5!
      • threat
        • 2.Sc4#
      • 1...Bd7+
        • 2.Rxd7#
      • 1...Rc1
        • 2.Sf7#
      • 1...Rf5
        • 2.Rd7#
      • 1...Bf5
        • 2.Sf7#
      • 1...Sf5
        • 2.Rg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(d);N_GUARD,S_CUTB(b),S_CUTR(a)::R(E)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • B(b);CHECK,N_GUARD::R1(G),XB(b)
      • R(a);N_GUARD::S(F)
      • R(a);S_CUTB(b)::R1(G)
      • B(b);S_CUTR(a)::S(F)
      • S(d);N_GUARD,S_CUTB(b),S_CUTR(a)::R(E)
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