MESON Chess Problem Database

Problem Display
PID: 48552 (2Q3bn/KRBr4/2P3p1/4P3/P1k5/1N3B2/2Pp4/1Nb5 w - - 0 1)

Alvey, George Clarence Vincent

2nd Prize, Gazette-Times, 1911

2Q3bn/KRBr4/2P3p1/4P3/P1k5/1N3B2/2Pp4/1Nb5

#2

11 + 7

56 The Problemist 1929
5293 A selection of chess problems by G. C. Alvey 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc7
      • 2.Qg4#
    • 1...Re7
      • 2.Qg4#
    • 1...Rf7
      • 2.Qe6#
    • 1...Rg7
      • 2.Qg4#
    • 1...Rh7
      • 2.Qg4#
    • 1...Bd5
      • 2.Be2#
  • Tries
    • 1.cxd7?
      • threat
        • 2.Ba5#
        • 2.Bd6#
        • 2.Bb8#
        • 2.Bd8#
      • 1...Bd5
        • 2.Be2#
      • 1...Ba3!
  • Keys
    • 1.Ba5!
      • threat
        • 2.cxd7#
      • 1...Rxb7+
        • 2.cxb7#
      • 1...Rd3
        • 2.Rb4#
      • 1...Rd4
        • 2.Rb4#
      • 1...Rd5
        • 2.Rb4#
      • 1...Rd6
        • 2.Rb4#
      • 1...Rc7
        • 2.Qg4#
      • 1...Re7
        • 2.Qg4#
      • 1...Rf7
        • 2.Qe6#
      • 1...Rg7
        • 2.Qg4#
      • 1...Rh7
        • 2.Qg4#
      • 1...Rd8
        • 2.Rb4#
      • 1...Ba3
        • 2.Sxa3#
      • 1...Bd5
        • 2.Be2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • R(e);OGATE,P_PINR(I),XB(J)::QAR(K)
    • R(e);OGATE::QAR(K)
    • R(e);OGATE::QAB(K)
    • B(f);SBLOCK,S_CUTR(e)::B(D)
  • Tries
    • Try
      • P(G);XR(e)
      • Threat
        • DUALS(4)
      • Vars
        • B(f);SBLOCK::B(D)
      • Refutation
        • B(a);
  • Actual
    • B(J);P_SPINR(I)
    • Threat
      • QAR(K)+P(G),XR(e)
    • Vars
      • R(e);CHECK,OGATE,XR(I)::QAR(K)+P(G),XR(e)
      • R(e);N_PINR(I)::R1(I)
      • R(e);OGATE::QAR(K)
      • R(e);OGATE::QAB(K)
      • B(a);N_GUARD::S(A),XB(a)
      • B(f);SBLOCK,S_CUTR(e)::B(D)
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