MESON Chess Problem Database

Problem Display
PID: 48138 (K2R4/NNk5/1p3p2/4n3/7R/2Bp2qb/8/8 w - - 0 1)

Dawson, Thomas Rayner

British Chess Magazine, 1946

K2R4/NNk5/1p3p2/4n3/7R/2Bp2qb/8/8

#2

6 + 7

3979 Systematic Terminology 1984
15256 TRD Scrapbook 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Sf3
      • 2.Rc4#
    • 1...Sc4
      • 2.Rxc4#
    • 1...Sg4
      • 2.Rh7#
    • 1...Sc6
      • 2.Sb5#
    • 1...Sg6
      • 2.Rc4#
    • 1...Sd7
      • 2.Rc8#
    • 1...Sf7
      • 2.Rc4#
    • 1...b5
      • 2.Ba5#
  • Tries
    • 1.Bxe5+?
      • 1...fxe5
        • 2.Rc4#
      • 1...Qxe5!
    • 1.Rc4+?
      • 1...Sc6
        • 2.Sb5#
        • 2.Rxc6#
      • 1...Sxc4!
  • Keys
    • 1.Bb4!
      • threat
        • 2.Bd6#
      • 1...b5
        • 2.Ba5#
      • 1...Sf3
        • 2.Rc4#
      • 1...Sc4
        • 2.Rxc4#
      • 1...Sg4
        • 2.Rh7#
      • 1...Sc6
        • 2.Sb5#
      • 1...Sg6
        • 2.Rc4#
      • 1...Sd7
        • 2.Rc8#
      • 1...Sf7
        • 2.Rc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(d);N_GUARD::R(B)
    • S(d);N_GUARD::R(B),XS(d)
    • S(d);N_GUARD,S_CUTB(c),S_CUTQ(b)::R(B)
    • S(d);SBLOCK::S(C)
    • S(d);SBLOCK,S_CUTB(c)::R1(F)
    • P(e);OGATEB::B(A)
  • Tries
    • Try
      • B(A);CHECK,XS(d)
      • Vars
        • P(f);XB(A)::R(B)
      • Refutation
        • Q(b);XB(A)
    • Try
      • R(B);CHECK
      • Refutation
        • S(d);XR(B)
  • Actual
    • B(A);
    • Threat
      • B(A)
    • Vars
      • P(e);OGATEB::B(A)
      • S(d);N_GUARD::R(B)
      • S(d);N_GUARD::R(B),XS(d)
      • S(d);N_GUARD,S_CUTB(c),S_CUTQ(b)::R(B)
      • S(d);SBLOCK::S(C)
      • S(d);SBLOCK,S_CUTB(c)::R1(F)
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