MESON Chess Problem Database

Problem Display
PID: 49666 (4B3/KQR5/2rp4/2N5/nBkpP3/3N4/5r2/n2b4 w - - 0 1)

Alvey, George Clarence Vincent

3rd Prize, Manchester Weekly Times, 1914

4B3/KQR5/2rp4/2N5/nBkpP3/3N4/5r2/n2b4

#2

8 + 8

56 The Problemist 2003
5293 A selection of chess problems by G. C. Alvey 2004
15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Ra6+
      • 2.Qxa6#
    • 1...Rb6
      • 2.Qd5#
    • 1...Rxc7
      • 2.Bb5#
    • 1...Sb6
      • 2.Qa6#
    • 1...d5
      • 2.Se5#
  • Tries
    • 1.Bf7+?
      • 1...d5
        • 2.Se5#
        • 2.Bxd5#
      • 1...Rxf7!
  • Keys
    • 1.Bd2!
      • threat
        • 2.Qb4#
      • 1...Ra6+
        • 2.Qxa6#
      • 1...Rxc5
        • 2.Qb5#
      • 1...Rxc7
        • 2.Bb5#
      • 1...Sxc5
        • 2.Sb2#
      • 1...dxc5
        • 2.Se5#
      • 1...Sb6
        • 2.Qa6#
      • 1...Rb6
        • 2.Qd5#
      • 1...Sc2
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(g);CHECK,N_GUARD::QAB(F),XR(g)
    • R(g);OGATE::QAB1(F)
    • R(g);OGATE,P_PINQ(F),XR(G)::B(H)
    • S(d);S_CUTR(g)::QAB(F)
    • P(h);N_GUARD::S(A)
  • Tries
    • Try
      • B(H);CHECK
      • Refutation
        • R(c);XB(H)
  • Actual
    • B(B);
    • Threat
      • QAR1(F)
    • Vars
      • R(g);CHECK,N_GUARD::QAB(F),XR(g)
      • R(g);P_SPINR(g),XS(D)::QAB1(F)
      • R(g);OGATE,P_PINQ(F),XR(G)::B(H)
      • S(d);N_GUARD,SBLOCK,XS(D)::S(A)
      • P(h);N_GUARD,SBLOCK,XS(D)::S(A)
      • S(d);S_CUTR(g)::QAB(F)
      • R(g);OGATE::QAB1(F)
      • S(a);N_GUARD,S_CUTB(b)::QAB1(F)
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