MESON Chess Problem Database

Problem Display
PID: 40410 (1nK1B3/2Np3p/n1kN4/4P3/P7/Br6/3b4/6QR w - - 0 1)

Dawson, Thomas Rayner

5th Comm., BCPS 010. Ty., 1929-1930

1nK1B3/2Np3p/n1kN4/4P3/P7/Br6/3b4/6QR

#2

9 + 7

56 The Problemist 1930
136 Problem Observer 2001
136 Problem Observer 2006
15256 TRD Scrapbook 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Rb5
      • 2.axb5#
    • 1...Rb6
      • 2.Qg2#
    • 1...Sc5
      • 2.Qxc5#
    • 1...Sxc7
      • 2.Qc5#
  • Tries
    • 1.Sdb5?
      • threat
        • 2.Sa7#
      • 1...Rxb5
        • 2.axb5#
      • 1...Sxc7
        • 2.Qc5#
      • 1...Re3
        • 2.Rh6#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Be3!
  • Keys
    • 1.Sc4!
      • 1...Rxa3
        • 2.Qb6#
      • 1...Sxc7
        • 2.Qc5#
      • 1...Rb1
        • 2.Qg2#
      • 1...Rb2
        • 2.Qg2#
      • 1...Rc3
        • 2.Sa5#
        • 2.Qb6#
      • 1...Rd3
        • 2.Qb6#
      • 1...Re3
        • 2.Rh6#
      • 1...Rf3
        • 2.Qb6#
      • 1...Rg3
        • 2.Qb6#
      • 1...Rh3
        • 2.Qb6#
      • 1...Rb4
        • 2.Sa5#
      • 1...Rb5
        • 2.axb5#
      • 1...Rb6
        • 2.Qxb6#
        • 2.Qg2#
      • 1...Rb7
        • 2.Qg2#
      • 1...Bc1
        • 2.Sa5#
      • 1...Be1
        • 2.Rh6#
      • 1...Bc3
        • 2.Rh6#
        • 2.Qg2#
      • 1...Be3
        • 2.Qg2#
      • 1...Bb4
        • 2.Qb6#
      • 1...Bf4
        • 2.Sa5#
      • 1...Ba5
        • 2.Sxa5#
        • 2.Rh6#
      • 1...Bg5
        • 2.Sa5#
      • 1...Bh6
        • 2.Sa5#
        • 2.Rxh6#
      • 1...Sb4
        • 2.Sa5#
        • 2.Qb6#
      • 1...Sc5
        • 2.Qxc5#
      • 1...h5
        • 2.Qg6#
      • 1...h6
        • 2.Qg6#

There are these versions: 6469

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 18
    • REMOVED MATES = 1
  • Sets
    • R(b);OGATE::P(D),XR(b)
    • R(b);N_GUARD,SBLOCK::QAB(A)
    • S(c);N_GUARD::QAR1(A),XS(c)
    • S(c);N_GUARD,XS(G)::QAR1(A)
  • Tries
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • R(b);OGATE,XS(F)::P(D),XR(b)
        • S(c);N_GUARD,XS(G)::QAR1(A)
        • R(b);S_CUTB(a)::R(B)
        • S(c);N_GUARD::QAR1(A),XS(c)
      • Refutation
        • B(a);
  • Actual
    • S(F);
    • Vars
      • R(b);N_GUARD,XB(C)::QAR1(A)
      • S(c);N_GUARD,XS(G)::QAR1(A)
      • R(b);N_GUARD::QAB(A)
      • R(b);N_GUARD::QAR1(A)
      • R(b);S_CUTB(a)::R(B)
      • R(b);S_CUTB(a)::S(F)
      • R(b);OGATE::P(D),XR(b)
      • B(a);N_GUARD::S(F)
      • B(a);N_GUARD::R(B)
      • B(a);S_CUTR(b)::QAB(A)
      • B(a);S_CUTR(b)::QAR1(A)
      • S(c);N_GUARD::QAR1(A),XS(c)
      • P(f);N_GUARD::QAR(A)
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