MESON Chess Problem Database

Problem Display
PID: 31467 (5K2/2p2P1b/2rp4/N3p3/1B1k3r/R6R/1nP3Q1/1q2N1b1 w - - 0 1)

Williams, JD

2nd Prize, Hampstead Express, 1907

5K2/2p2P1b/2rp4/N3p3/1B1k3r/R6R/1nP3Q1/1q2N1b1

#2

9 + 10

56 The Problemist 1927
881 The Australasian Chess Review 1929
56 The Problemist 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Rc4
      • 2.Sb3#
    • 1...Ra6
      • 2.c3#
    • 1...Rb6
      • 2.c3#
    • 1...Sc4
      • 2.Sxc6#
      • 2.c3#
  • Tries
    • 1.Bc3+?
      • 1...Kc5
        • 2.Qxc6#
      • 1...Rxc3!
    • 1.Rxh4+?
      • 1...Be4
        • 2.Qxe4#
      • 1...e4!
  • Keys
    • 1.c4!
      • threat
        • 2.Qd5#
      • 1...Rxc4
        • 2.Sb3#
      • 1...Sxc4
        • 2.Sxc6#
      • 1...e4
        • 2.Qg7#
      • 1...Qe4
        • 2.Qxb2#
      • 1...Re4
        • 2.Sf3#
      • 1...Rc5
        • 2.Bc3#
      • 1...Be4
        • 2.Qxg1#
      • 1...d5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • R(g);SBLOCK::S(G)
    • R(g);N_GUARD::P(B)
  • Tries
    • Try
      • B(F);CHECK
      • Vars
        • K(d);S_FLIGHT::QAR1(C),XR(g)
      • Refutation
        • R(g);XB(F)
    • Try
      • R(E);CHECK,XR(e)
      • Vars
        • B(j);N_GUARD,P_SPINB(j)::QAR1(C),XB(j)
      • Refutation
        • P(f);P_SPINP(f)
  • Actual
    • P(B);
    • Threat
      • QAR1(C)
    • Vars
      • R(g);SBLOCK,XP(B)::S(G)
      • S(c);SBLOCK,XP(B)::S(G),XR(g)
      • P(f);OGATEB,SBLOCK::QAB(C)
      • Q(a);N_GUARD,SBLOCK::QAB(C),XS(c)
      • R(e);SBLOCK::S(A)
      • R(g);SBLOCK::B(F)
      • B(j);SBLOCK::QAB(C),XB(b)
      • P(h);::QAR1(C),XP(h)
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Developed and maintained by Brian Stephenson.
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