MESON Chess Problem Database

Problem Display
PID: 57661 (b2q2Rr/BNkPN2R/P1P5/K2p4/n3p2p/3r4/2Q5/8 w - - 0 1)

Goodare, KJ

1st Prize, Chess, 1952

b2q2Rr/BNkPN2R/P1P5/K2p4/n3p2p/3r4/2Q5/8

#2

10 + 9

81 Chess 1953
785 Het Belgisch Schaakbord (L'Echiquier Belge) 1954
1997 Ajedrez 1955
56 The Problemist 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe7
      • 2.Bb8#
      • 2.d8Q#
    • 1...Qxd7
      • 2.Bb8#
    • 1...Qb8
      • 2.Bxb8#
    • 1...Qc8
      • 2.dxc8Q#
      • 2.dxc8R#
    • 1...Qe8
      • 2.dxe8S#
    • 1...Rd1
      • 2.Qh2#
    • 1...Ra3
      • 2.Sxd5#
    • 1...Rb3
      • 2.Sxd5#
    • 1...Re3
      • 2.Sxd5#
    • 1...Rf3
      • 2.Sxd5#
    • 1...Rg3
      • 2.Sxd5#
    • 1...Rh3
      • 2.Sxd5#
    • 1...Rd4
      • 2.Qh2#
    • 1...e3
      • 2.Qh2#
    • 1...d4
      • 2.Sd5#
  • Tries
    • 1.Bb6+?
      • 1...Kb8
        • 2.a7#
        • 2.c7#
      • 1...Sxb6!
  • Keys
    • 1.Bd4!
      • threat
        • 2.Be5#
      • 1...Kb8+
        • 2.c7#
      • 1...Qxe7
        • 2.d8Q#
      • 1...Qxd7
        • 2.Sxd5#
      • 1...Rxd4
        • 2.Qh2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 11
  • Sets
    • Q(h);N_GUARD,XP(G)::B(E)
    • Q(h);N_GUARD::B(E),XQ(h)
    • Q(h);OGATE::PXQ(h)=Q
    • Q(h);OGATE::PXQ(h)=S
    • R(a);N_GUARD::QAB(A)
    • R(a);N_GUARD::S(H),XP(e)
    • P(c);S_CUTR(a)::QAB(A)
    • P(e);S_CUTR(a)::S(H)
  • Tries
    • Try
      • B(E);CHECK
      • Refutation
        • S(b);XB(E)
  • Actual
    • B(E);
    • Threat
      • B(E)
    • Vars
      • K(f);CHECK,OGATE,P_SPINQ(h),S_FLIGHT::P(D)
      • Q(h);OGATE,XS(H)::P=Q
      • Q(h);XP(G)::S(H),XP(e)
      • R(a);N_GUARD,XB(E)::QAB(A)
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