MESON Chess Problem Database

Problem Display
PID: 153577 (7R/5N2/4K1kr/8/4N2p/2B5/4B3/2b2n2 w - - 0 1)

Harley, Brian

The Observer, 1944

(First published on Sun Apr 23 1944)

7R/5N2/4K1kr/8/4N2p/2B5/4B3/2b2n2

#2

6 + 5

15290 Harley Scrapbook 2014
15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rh5
      • 2.Bxh5#
    • 1...Bb2
      • 2.Rxh6#
    • 1...Ba3
      • 2.Rxh6#
    • 1...Sd2
      • 2.Rxh6#
    • 1...Se3
      • 2.Rxh6#
  • Keys
    • 1.Bd3!
      • threat
        • 2.Sg3#
      • 1...Kh5+
        • 2.Sf6#
      • 1...Rh5
        • 2.Seg5#
      • 1...Sd2
        • 2.Rxh6#
      • 1...Se3
        • 2.Rxh6#
      • 1...Sg3
        • 2.Sxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(e);N_GUARD::B(A),XR(e)
    • B(a);N_GUARD::R1(F),XR(e)
    • S(b);S_CUTB(a)::R1(F),XR(e)
  • Actual
    • B(A);
    • Threat
      • B(A)+S(C)
    • Vars
      • K(d);CHECK,P_SPINR(e),S_FLIGHT::S(C)
      • R(e);::B(A)+S(C)
      • S(b);S_CUTB(a)::R1(F),XR(e)
      • S(b);::B(A)+S(C),XS(b)
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