MESON Chess Problem Database

Problem Display
PID: 154711 (1NqR4/Ppk1Pb2/1p1p4/1P6/8/4N3/7p/4B2K w - - 0 1)

Williams, Philip Hamilton

Devon and Exeter Gazette, 1906

1NqR4/Ppk1Pb2/1p1p4/1P6/8/4N3/7p/4B2K

#2

8 + 7

15351 SCPF/BCPS Black Books 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Qh3
      • 2.a8S#
    • 1...Qg4
      • 2.a8S#
    • 1...Qf5
      • 2.a8S#
    • 1...Qe6
      • 2.a8S#
    • 1...Qd7
      • 2.a8S#
    • 1...Qxb8
      • 2.axb8Q#
      • 2.axb8B#
    • 1...Bd5+
      • 2.Sxd5#
    • 1...Bh5
      • 2.Sd5#
    • 1...Bg6
      • 2.Sd5#
    • 1...Be8
      • 2.Sd5#
    • 1...d5
      • 2.Bg3#
  • Tries
    • 1.Bg3?
      • threat
        • 2.Bxd6#
      • 1...Bd5+
        • 2.Sxd5#
      • 1...Qe6
        • 2.a8S#
      • 1...Qd7
        • 2.a8S#
      • 1...Qxd8!
    • 1.Bb4?
      • threat
        • 2.Bxd6#
      • 1...Bd5+
        • 2.Sxd5#
      • 1...Qe6
        • 2.a8S#
      • 1...Qd7
        • 2.a8S#
      • 1...d5
        • 2.Bd6#
      • 1...Qxd8!
  • Keys
    • 1.Bh4!
      • 1...Bd5+
        • 2.Sxd5#
      • 1...Qxb8
        • 2.axb8Q#
        • 2.axb8B#
      • 1...Qxd8
        • 2.exd8Q#
      • 1...Ba2
        • 2.e8S#
      • 1...Qh3
        • 2.a8S#
      • 1...Qg4
        • 2.a8S#
      • 1...Qf5
        • 2.a8S#
      • 1...Qe6
        • 2.a8S#
      • 1...Qd7
        • 2.a8S#
      • 1...Bb3
        • 2.e8S#
      • 1...Bc4
        • 2.e8S#
      • 1...Bh5
        • 2.Sd5#
      • 1...Be6
        • 2.e8S#
      • 1...Bg6
        • 2.Sd5#
      • 1...Be8
        • 2.Sd5#
      • 1...Bg8
        • 2.e8S#
      • 1...d5
        • 2.Bg3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • Q(g);::P=S
    • Q(g);OGATE,XS(G)::PXQ(g)=Q
    • B(f);CHECK,N_GUARD::S(C),XB(f)
    • B(f);N_GUARD::S(C)
    • P(c);OGATEB::B(A)
  • Tries
    • Try
      • B(A);P_PINP(c)
      • Threat
        • B(A),XP(c)
      • Vars
        • B(f);CHECK,N_GUARD::S(C),XB(f)
        • Q(g);::P=S
      • Refutation
        • Q(g);XR(H)
    • Try
      • B(A);
      • Threat
        • B(A),XP(c)
      • Vars
        • B(f);CHECK,N_GUARD::S(C),XB(f)
        • Q(g);::P=S
        • P(c);::B(A)
      • Refutation
        • Q(g);XR(H)
  • Actual
    • B(A);
    • Vars
      • B(f);CHECK,N_GUARD::S(C),XB(f)
      • Q(g);OGATE,XS(G)::PXQ(g)=Q
      • Q(g);OGATE,XR(H)::PXQ(g)=Q
      • B(f);N_GUARD::P=S
      • Q(g);::P=S
      • B(f);N_GUARD::S(C)
      • P(c);OGATEB::B(A)
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