MESON Chess Problem Database

Problem Display
PID: 190908 (3RB2n/bpB4K/2p5/2pR3p/4k2r/2P1p2r/4Q3/1b5n w - - 0 1)

Evans, TC

The Observer, 1938

(First published on Sun Aug 21 1938)

3RB2n/bpB4K/2p5/2pR3p/4k2r/2P1p2r/4Q3/1b5n

#2

7 + 12

5454 Near Snap 2019
15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rf3
      • 2.Qc4#
    • 1...Rf4
      • 2.Re5#
    • 1...Sg3
      • 2.Qg2#
    • 1...Sg6
      • 2.Bxg6#
  • Keys
    • 1.Bd7!
      • threat
        • 2.Bf5#
      • 1...Kxd5+
        • 2.Bf5#
      • 1...cxd5
        • 2.Re8#
      • 1...Rf3
        • 2.Qc4#
      • 1...Rf4
        • 2.Re5#
      • 1...Sg3
        • 2.Qg2#

This anticipates 16387(1940)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(d);SBLOCK::QAR2(A)
    • R(f);SBLOCK::R1(C)
    • S(b);S_CUTR(d)::QAB(A)
    • S(l);N_GUARD::B(G),XS(l)
  • Actual
    • B(G);
    • Threat
      • B(G)
    • Vars
      • K(e);CHECK,N_SPINP(c),S_FLIGHT,XR(C)::R(F)+B(G)
      • P(i);SBLOCK,XR(C)::R(F)
      • R(d);SBLOCK::QAR2(A)
      • R(f);SBLOCK::R1(C)
      • S(b);S_CUTR(d)::QAB(A)
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