MESON Chess Problem Database

Problem Display
PID: 268167 (8/3r4/4Q3/1p2p2b/4k1P1/1N2b1RN/2nPB1P1/4n2K w - - 0 1)

Dewfall, EJ

Sunday Referee, 1928

(First published on Sun Dec 30 1928)

8/3r4/4Q3/1p2p2b/4k1P1/1N2b1RN/2nPB1P1/4n2K

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Sc5#
    • 1...Rd5
      • 2.Qf5#
    • 1...Ra7
      • 2.Qc6#
    • 1...Rb7
      • 2.Qc6#
    • 1...Re7
      • 2.Qc6#
    • 1...Rf7
      • 2.Qc6#
    • 1...Rg7
      • 2.Qc6#
    • 1...Rh7
      • 2.Qc6#
    • 1...Bf4
      • 2.Sf2#
    • 1...Sd3
      • 2.Bf3#
    • 1...Sf3
      • 2.gxf3#
    • 1...Sa1
      • 2.Rxe3#
    • 1...Sa3
      • 2.Rxe3#
    • 1...Sb4
      • 2.Rxe3#
    • 1...Sd4
      • 2.Sc5#
      • 2.Rxe3#
  • Tries
    • 1.Qc4+?
      • 1...Rd4
        • 2.Sc5#
      • 1...Bd4
        • 2.Sc5#
      • 1...Sd4
        • 2.Sc5#
        • 2.Rxe3#
      • 1...bxc4!
    • 1.d3+?
      • 1...Sxd3
        • 2.Bf3#
      • 1...Rxd3!
  • Keys
    • 1.d4!
      • threat
        • 2.Qxe5#
      • 1...Rxd4
        • 2.Sc5#
      • 1...Bxd4
        • 2.Sd2#
      • 1...Sxd4
        • 2.Sc5#
      • 1...Rd5
        • 2.Qf5#
      • 1...Re7
        • 2.Qc6#
      • 1...Bf4
        • 2.Sf2#
      • 1...Sd3
        • 2.Bf3#
      • 1...Sf3
        • 2.gxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • R(h);SBLOCK,S_CUTB(c)::S(E)
    • R(h);SBLOCK::QAB1(I)
    • R(h);N_GUARD::QAB(I)
    • B(c);N_GUARD,SBLOCK::S(G)
    • S(a);N_GUARD,SBLOCK::B(C)
    • S(a);OGATE::P(D),XS(a)
    • S(b);N_GUARD::R1(F),XB(c)
  • Tries
    • Try
      • Q(I);CHECK,N_PINP(f)
      • Vars
        • R(h);P_SPINR(h)::S(E)
        • B(c);P_SPINB(c)::S(E)
      • Refutation
        • P(e);XQ(I)
    • Try
      • P(B);CHECK
      • Vars
        • S(a);SBLOCK,XP(B)::B(C)
      • Refutation
        • R(h);XP(B)
  • Actual
    • P(B);
    • Threat
      • QAR1(I),XP(f)
    • Vars
      • R(h);SBLOCK,XP(B)::S(E)
      • B(c);N_GUARD,SBLOCK,XP(B)::S(E)
      • S(b);SBLOCK,XP(B)::S(E)
      • R(h);SBLOCK::QAB1(I)
      • R(h);N_GUARD::QAB(I)
      • B(c);N_GUARD,SBLOCK::S(G)
      • S(a);N_GUARD,SBLOCK::B(C)
      • S(a);OGATE::P(D),XS(a)
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