MESON Chess Problem Database

Problem Display
PID: 186943 (8/5K1B/6r1/1N1p4/3PkBRn/2p1Nq1r/2P2RQ1/8 w - - 0 1)

Goulty, Allison Howard

The Observer, 1933

(First published on Sun Dec 3 1933)

8/5K1B/6r1/1N1p4/3PkBRn/2p1Nq1r/2P2RQ1/8

#2

10 + 7

15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sxg2
      • 2.Bxg6#
    • 1...Sf5
      • 2.Bg5#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Scd6#
      • 1...Kf5
        • 2.Scd6#
        • 2.Sbd6#
      • 1...Sf5
        • 2.Bg5#
      • 1...dxc4!
    • 1.Bxg6+?
      • 1...Sf5
        • 2.Bg5#
        • 2.Bh6#
        • 2.Bxf5#
      • 1...Sxg6!
    • 1.Qxf3+?
      • 1...Sxf3
        • 2.Bg5#
        • 2.Bh6#
        • 2.Bxg6#
      • 1...Rxf3!
  • Keys
    • 1.Sf1!
      • 1...Kf5
        • 2.Sd6#
      • 1...Qxg2
        • 2.Bg3#
      • 1...Sxg2
        • 2.Bxg6#
      • 1...Rh1
        • 2.Sg3#
      • 1...Rh2
        • 2.Sg3#
      • 1...Rg3
        • 2.Sxg3#
      • 1...Sf5
        • 2.Bg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(e);N_GUARD,N_SPINQ(b),XQ(C)::B(J),XR(g)
    • S(e);N_PINB(F),N_SPINR(g)::R(G)+B(F)
  • Tries
    • Try
      • S(D);
      • Threat
        • S(D)
      • Vars
        • S(e);N_PINB(F),N_SPINR(g),SBLOCK::R(G)+B(F)
      • Refutation
        • P(f);XS(D)
    • Try
      • B(J);CHECK,XR(g)
      • Refutation
        • S(e);XB(J)
    • Try
      • Q(C);CHECK,N_SPINB(F),XQ(b)
      • Refutation
        • R(c);P_PINB(F),XQ(C)
  • Actual
    • S(D);
    • Vars
      • K(d);N_PINB(F),N_SPINQ(b),S_FLIGHT::S(H)
      • Q(b);N_PINB(F),N_SPINQ(b),XQ(C)::R(G)+B(F)
      • S(e);N_GUARD,N_SPINQ(b),XQ(C)::B(J),XR(g)
      • R(c);N_GUARD::S(D)
      • R(c);N_GUARD::S(D),XR(c)
      • S(e);N_PINB(F),N_SPINR(g),SBLOCK::R(G)+B(F)
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