MESON Chess Problem Database

Problem Display
PID: 230379 (6b1/3N4/1n6/5pb1/R1q2k1p/R5NP/3P2Pn/2B1K3 w - - 0 1)

Williams, Philip Hamilton

The Globe, 1911

(First published on Sat Jan 7 1911)

6b1/3N4/1n6/5pb1/R1q2k1p/R5NP/3P2Pn/2B1K3

#2

9 + 8

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa4
      • 2.d4#
    • 1...Qd4
      • 2.Rxd4#
    • 1...Qe4+
      • 2.Se2#
    • 1...Sf1
      • 2.Rf3#
    • 1...Sf3+
      • 2.Rxf3#
    • 1...Sg4
      • 2.Rf3#
    • 1...Sd5
      • 2.Rxc4#
    • 1...hxg3
      • 2.d3#
  • Tries
    • 1.Rxc4+?
      • 1...Bxc4
        • 2.d4#
      • 1...Sxc4!
  • Keys
    • 1.Rc3!
      • threat
        • 2.d4#
      • 1...Qe4+
        • 2.Se2#
      • 1...Sf3+
        • 2.Rxf3#
      • 1...hxg3
        • 2.d3#
      • 1...Qd4
        • 2.Rxd4#
      • 1...Sf1
        • 2.Rf3#
      • 1...Sg4
        • 2.Rf3#
      • 1...Sd5
        • 2.Raxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • Q(b);N_GUARD,N_SPINQ(b),XR(H)::B(A)+P(C)
    • Q(b);OGATE::R(H),XQ(b)
    • Q(b);CHECK::S(F)
    • S(a);N_GUARD::R1(E)
    • S(a);CHECK,N_GUARD::R1(E),XS(a)
    • S(g);N_GUARD,S_CUTB(h)::R(H),XQ(b)
    • P(d);SBLOCK,XS(F)::B(A)+P(C)
  • Tries
    • Try
      • R(H);CHECK,XQ(b)
      • Vars
        • B(h);XR(H)::B(A)+P(C)
      • Refutation
        • S(g);XR(H)
  • Actual
    • R(E);
    • Threat
      • B(A)+P(C)
    • Vars
      • Q(b);CHECK::S(F)
      • S(a);CHECK,N_GUARD::R1(E),XS(a)
      • P(d);SBLOCK,XS(F)::B(A)+P(C)
      • Q(b);OGATE::R(H),XQ(b)
      • S(a);N_GUARD::R1(E)
      • S(g);N_GUARD,S_CUTB(h)::R(H),XQ(b)
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