MESON Chess Problem Database

Problem Display
PID: 7604 (1Br5/2p1Pp2/R1N1kq2/nQ3p2/2bR1P2/2N1b3/BK1n4/8 w - - 0 1)

Saunders, Denis M

2nd HM., The Problemist, 1991/II

1Br5/2p1Pp2/R1N1kq2/nQ3p2/2bR1P2/2N1b3/BK1n4/8

#2

10 + 10

1085 Australian Chess Problem Magazine 1996
3936 The Wizard of Oz 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Qh4
      • 2.Qe5#
    • 1...Qe5
      • 2.Qxe5#
    • 1...Qg5
      • 2.Qe5#
    • 1...Qxe7
      • 2.Sd8#
      • 2.Qe5#
    • 1...Qg6
      • 2.Qe5#
    • 1...Qh6
      • 2.Qe5#
    • 1...Rf8
      • 2.exf8S#
    • 1...Bd5
      • 2.Qxd5#
  • Tries
    • 1.e8Q+?
      • 1...Qe7
        • 2.Sd8#
        • 2.Qe5#
        • 2.Qxe7#
      • 1...Rxe8!
    • 1.e8R+?
      • 1...Qe7
        • 2.Sd8#
        • 2.Qe5#
      • 1...Rxe8!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Sd8#
      • 1...Qxd4+
        • 2.Sxd4#
      • 1...Bxd4+
        • 2.Sxd4#
      • 1...Kd6
        • 2.Sxa5#
      • 1...Kd7
        • 2.Se5#
      • 1...Bxf4
        • 2.Sxf4#
      • 1...Bxb5
        • 2.Sxc7#
      • 1...Bxd5
        • 2.Qxd5#
      • 1...Sxc6
        • 2.Qxc6#
      • 1...Rd8
        • 2.Sxc7#
        • 2.Sxd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 6
  • Sets
    • Q(g);N_GUARD::QAR1(F)
    • Q(g);N_GUARD::QAR1(F),XQ(g)
    • R(j);OGATE::PXR(j)=S
    • B(c);N_GUARD::QAB1(F),XB(c)
  • Tries
    • Try
      • P(I);CHECK
      • Refutation
        • R(j);XQ(I)
    • Try
      • P(I);CHECK
      • Refutation
        • R(j);XR(I)
  • Actual
    • S(C);N_PINB(c),P_SPINR(D)
    • Threat
      • R(G)+S(H),DCHECK
    • Vars
      • Q(g);CHECK,XR(D)::R(G)+S(H),DCHECK,XQ(g)
      • B(b);CHECK,XR(D)::R(G)+S(H),DCHECK,XB(b)
      • K(f);P-FLIGHT,P_SPINP(h)::R(G)+S(H),XS(d)
      • K(f);S_FLIGHT::QAB(F)+S(H),DCHECK
      • B(b);XP(E)::S(C),XB(b)
      • B(c);XQ(F)::B(A)+S(C),DCHECK,XP(h)
      • B(c);OGATE,P_SPINB(c),XS(C)::QAB1(F),XB(c)
      • S(d);OGATE,P_SPINS(d),XS(H)::QAR2(F),XS(d)
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