MESON Chess Problem Database

Problem Display
PID: 21430 (b1r5/4N2p/n3R3/1p4NK/n2k3p/Q4P2/p4b1q/5BB1 w - - 0 1)

Alvey, George Clarence Vincent

1st Prize, BCPJ (May), 1919

b1r5/4N2p/n3R3/1p4NK/n2k3p/Q4P2/p4b1q/5BB1

#2

8 + 11

2682 BCPJ (June) 1919
56 The Problemist 1929
56 The Problemist 2003
5293 A selection of chess problems by G. C. Alvey 2004
15148 Sadier Collection 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6
      • 2.Bxf2#
    • 1...Qc7
      • 2.Bxf2#
    • 1...Qb8
      • 2.Bxf2#
    • 1...Qh1
      • 2.Bxf2#
    • 1...Qh3
      • 2.Bxf2#
    • 1...Rc5
      • 2.Qd3#
    • 1...Rc6
      • 2.Re4#
    • 1...Be3
      • 2.Bxe3#
      • 2.Qxe3#
    • 1...Bxf3+
      • 2.Sxf3#
    • 1...Be4
      • 2.Rxe4#
    • 1...Bd5
      • 2.Sf5#
    • 1...S4c5
      • 2.Qb2#
    • 1...S6c5
      • 2.Qb4#
    • 1...Sc7
      • 2.Qb4#
  • Keys
    • 1.Re1!
      • threat
        • 2.Se6#
      • 1...Bxf3+
        • 2.Sxf3#
      • 1...Be3
        • 2.Qxe3#
      • 1...Be4
        • 2.Rxe4#
      • 1...Qe5
        • 2.Rd1#
      • 1...Qd6
        • 2.Bxf2#
      • 1...Qh3
        • 2.Bxf2#
      • 1...Rc5
        • 2.Qd3#
      • 1...Rc6
        • 2.Re4#
      • 1...Bd5
        • 2.Sf5#
      • 1...S4c5
        • 2.Qb2#
      • 1...S6c5
        • 2.Qb4#
      • 1...Sc7
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(c);N_GUARD::B(B),XB(b)
    • R(k);P_PINS(E),SBLOCK::QAR1(C)
    • R(k);S_CUTB(j)::R1(G)
    • B(j);CHECK,XP(D)::S(E),XB(j)
    • B(j);N_GUARD::R1(G),XB(j)
    • B(j);SBLOCK::S(H)
    • S(d);N_GUARD,SBLOCK,S_CUTR(k)::QAB(C)
    • S(h);N_GUARD,S_CUTR(k)::QAR2(C)
  • Actual
    • R(G);
    • Threat
      • S(E)
    • Vars
      • B(j);CHECK,XP(D)::S(E),XB(j)
      • B(b);N_GUARD::QAB1(C),XB(b)
      • B(j);N_GUARD::R1(G),XB(j)
      • Q(c);P_PINS(E),SBLOCK::R(G)
      • Q(c);N_GUARD::B(B),XB(b)
      • R(k);P_PINS(E),SBLOCK::QAR1(C)
      • R(k);S_CUTB(j)::R1(G)
      • B(j);SBLOCK::S(H)
      • S(d);N_GUARD,SBLOCK,S_CUTR(k)::QAB(C)
      • S(h);N_GUARD,S_CUTR(k)::QAR2(C)
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