MESON Chess Problem Database

Problem Display
PID: 184367 (8/r2p1R1K/1p4RN/r2p4/p4PP1/2BPk3/1Nn3Qb/2nb4 w - - 0 1)

Howard, Kenneth Samuel

The Observer, 1928

(First published on Sun Jun 10 1928)

8/r2p1R1K/1p4RN/r2p4/p4PP1/2BPk3/1Nn3Qb/2nb4

#2

10 + 11

15239 Valois Notebooks 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bf3
      • 2.Qd2#
    • 1...Bxg4
      • 2.Sxg4#
    • 1...Bxf4
      • 2.Sf5#
    • 1...Sxd3
      • 2.Sxd1#
    • 1...Sd4
      • 2.Bd2#
    • 1...d4
      • 2.Bd2#
    • 1...d6
      • 2.Re6#
  • Tries
    • 1.Rg5?
      • threat
        • 2.Re5#
      • 1...Bxf4
        • 2.Sf5#
      • 1...Sxd3
        • 2.Sxd1#
      • 1...Bf3
        • 2.Qd2#
      • 1...d4
        • 2.Bd2#
      • 1...d6!
  • Keys
    • 1.Rgf6!
      • threat
        • 2.Re7#
      • 1...Bxg4
        • 2.Sxg4#
      • 1...Bxf4
        • 2.Sf5#
      • 1...Sxd3
        • 2.Sxd1#
      • 1...Bf3
        • 2.Qd2#
      • 1...Sd4
        • 2.Bd2#
      • 1...d4
        • 2.Bd2#
      • 1...d6
        • 2.Re6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • B(b);SBLOCK::QAB1(B)
    • B(b);XP(F)::S(H),XB(b)
    • B(d);SBLOCK,XP(E)::S(H)
    • S(a);SBLOCK,XP(D)::S(A),XB(b)
    • S(c);SBLOCK::B(C)
    • P(h);SBLOCK::B(C)
    • P(k);N_GUARD,P_PINR(I)::R(G)
  • Tries
    • Try
      • R(G);
      • Threat
        • R(G)
      • Vars
        • B(d);SBLOCK,XP(E)::S(H)
        • S(a);SBLOCK,XP(D)::S(A),XB(b)
        • B(b);SBLOCK::QAB1(B)
        • P(h);SBLOCK::B(C)
      • Refutation
        • P(k);P_PINR(I)
  • Actual
    • R(G);
    • Threat
      • R(I)
    • Vars
      • B(b);XP(F)::S(H),XB(b)
      • B(d);SBLOCK,XP(E)::S(H)
      • S(a);SBLOCK,XP(D)::S(A),XB(b)
      • B(b);SBLOCK::QAB1(B)
      • S(c);SBLOCK::B(C)
      • P(h);SBLOCK::B(C)
      • P(k);N_GUARD,P_PINR(I)::R(G)
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