MESON Chess Problem Database

Problem Display
PID: 154236 (4B1Q1/3prP1n/3B1k2/K1NR1b2/4pPr1/8/1R6/8 w - - 0 1)

Alvey, George Clarence Vincent

Hampstead and Highgate Express, 1913

(First published on Sat Sep 27 1913)

4B1Q1/3prP1n/3B1k2/K1NR1b2/4pPr1/8/1R6/8

#2

9 + 7

14867 BCPS Library 2015
15148 Sadier Collection 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.fxe5#
    • 1...Re6
      • 2.Sxd7#
    • 1...Rxf7
      • 2.Qxf7#
    • 1...Rxe8
      • 2.fxe8S#
    • 1...Be6
      • 2.Sxe4#
    • 1...Bg6
      • 2.Qh8#
  • Tries
    • 1.f8Q+?
      • 1...Rf7
        • 2.Be5#
        • 2.Be7#
        • 2.Qgxf7#
        • 2.Qfxf7#
      • 1...Sxf8!
    • 1.f8R+?
      • 1...Rf7
        • 2.Rxf7#
        • 2.Qxf7#
      • 1...Sxf8!
  • Keys
    • 1.Rb6!
      • threat
        • 2.Be5#
      • 1...Rxf7
        • 2.Qxf7#
      • 1...Rxe8
        • 2.fxe8S#
      • 1...Re5
        • 2.fxe5#
      • 1...Re6
        • 2.Sxd7#
      • 1...Be6
        • 2.Sxe4#
      • 1...Bg6
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • R(f);OGATE::P(B),XR(f)
    • R(f);N_GUARD,SBLOCK,S_CUTB(c)::S(D),XP(e)
    • R(f);OGATE,XP(G)::QAR1(I),XR(f)
    • R(f);OGATE,XB(H)::PXR(f)=S
    • B(c);N_GUARD,SBLOCK,S_CUTR(f)::S(D),XP(a)
    • B(c);SBLOCK,S_CUTR(b)::QAB(I)
  • Tries
    • Try
      • P(G);CHECK
      • Refutation
        • S(g);XQ(G)
    • Try
      • P(G);CHECK
      • Refutation
        • S(g);XR(G)
  • Actual
    • R(A);
    • Threat
      • R(A)+B(F),DCHECK
    • Vars
      • R(f);OGATE,XP(G)::QAR1(I),XR(f)
      • R(f);OGATE,XB(H)::PXR(f)=S
      • R(f);OGATE::P(B),XR(f)
      • R(f);N_GUARD,SBLOCK,S_CUTB(c)::S(D),XP(e)
      • B(c);N_GUARD,SBLOCK,S_CUTR(f)::S(D),XP(a)
      • B(c);SBLOCK,S_CUTR(b)::QAB(I)
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