MESON Chess Problem Database

Problem Display
PID: 52264 (3bR3/p4r1b/2Npn3/Q7/2P1n1R1/1NrPk3/5pPK/5B2 w - - 0 1)

Alvey, George Clarence Vincent

Surrey Weekly Press, 1920

3bR3/p4r1b/2Npn3/Q7/2P1n1R1/1NrPk3/5pPK/5B2

#2

10 + 10

5293 A selection of chess problems by G. C. Alvey 2004
15148 Sadier Collection 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Rf5
      • 2.Rxe4#
    • 1...Bg8
      • 2.Rxe4#
    • 1...Sf6
      • 2.Qg5#
    • 1...Sf4
      • 2.Rg3#
    • 1...Sc7
      • 2.Qxa7#
  • Tries
    • 1.Qa2?
      • threat
        • 2.Qe2#
      • 1...Sd2
        • 2.Qxd2#
      • 1...Sg3
        • 2.Qd2#
      • 1...Sd4
        • 2.Qd2#
      • 1...Sf4
        • 2.Rg3#
        • 2.Qd2#
      • 1...Rc2!
  • Keys
    • 1.Sb4!
      • threat
        • 2.Sd5#
      • 1...Rxb3
        • 2.Sc2#
      • 1...Rxd3
        • 2.Sc2#
      • 1...Rf5
        • 2.Rxe4#
      • 1...Sf6
        • 2.Qg5#
      • 1...Sf4
        • 2.Rg3#
      • 1...Sc7
        • 2.Qxa7#
      • 1...d5
        • 2.Sxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(h);S_CUTB(i)::R1(G),XS(d)
    • B(i);N_GUARD::R1(G),XS(d)
    • S(d);N_GUARD,P_SPINS(f),S_CUTB(j),S_CUTR(h)::QAB(H)
    • S(f);P_SPINS(d),SBLOCK,S_CUTR(h)::R(G)
    • S(f);N_GUARD,P_SPINS(d),S_CUTB(j),S_CUTR(h)::QAB(H),XP(g)
  • Tries
    • Try
      • Q(H);
      • Threat
        • QAR1(H)
      • Vars
        • S(d);N_GUARD,P_SPINS(f)::QAB1(H),XS(d)
        • S(d);N_GUARD,P_SPINS(f)::QAB1(H)
        • S(f);P_SPINS(d)::QAB1(H)
      • Refutation
        • R(b);
  • Actual
    • S(I);
    • Threat
      • S(I)
    • Vars
      • R(b);N_GUARD,XS(D)::S(I)
      • R(b);N_GUARD,XP(E)::S(I)
      • R(h);S_CUTB(i)::R1(G),XS(d)
      • S(d);N_GUARD,P_SPINS(f),S_CUTB(j),S_CUTR(h)::QAB(H)
      • S(f);P_SPINS(d),SBLOCK,S_CUTR(h)::R(G)
      • S(f);N_GUARD,P_SPINS(d),S_CUTB(j),S_CUTR(h)::QAB(H),XP(g)
      • P(e);::S(I),XP(e)
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