MESON Chess Problem Database

Problem Display
PID: 187119 (1K6/3N4/ppPRp3/1B5N/1n2k1P1/7R/2P1rP2/1bb5 w - - 0 1)

Daniel, Arthur William

The Observer, 1934

(First published on Sun Jul 29 1934)

1K6/3N4/ppPRp3/1B5N/1n2k1P1/7R/2P1rP2/1bb5

#2

10 + 8

15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rd2
      • 2.Re3#
    • 1...Be3
      • 2.f3#
    • 1...Bf4
      • 2.Shf6#
    • 1...Sa2
      • 2.Bd3#
    • 1...Sxc2
      • 2.Bd3#
    • 1...Sd3
      • 2.Bxd3#
    • 1...Sxc6+
      • 2.Bxc6#
    • 1...e5
      • 2.Sdf6#
  • Keys
    • 1.c3!
      • threat
        • 2.Rd4#
      • 1...Sxc6+
        • 2.Bxc6#
      • 1...Rd2
        • 2.Re3#
      • 1...Be3
        • 2.f3#
      • 1...Bf4
        • 2.Shf6#
      • 1...Sc2
        • 2.Bd3#
      • 1...Sd5
        • 2.Rxe6#
      • 1...e5
        • 2.Sdf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(c);N_GUARD,S_CUTB(b)::R1(C)
    • B(b);SBLOCK::P(B)
    • B(b);P_PINR(H),SBLOCK::S(F)
    • S(d);N_GUARD::B(E)
    • S(d);N_GUARD,XP(A)::B(E)
    • S(d);N_GUARD::B(E),XS(d)
    • S(d);CHECK,OGATE,XP(G)::B(E),XS(d)
    • P(h);SBLOCK::S(I)
  • Actual
    • P(A);
    • Threat
      • R1(H)
    • Vars
      • S(d);CHECK,OGATE,XP(G)::B(E),XS(d)
      • R(c);N_GUARD,S_CUTB(b)::R1(C)
      • B(b);SBLOCK::P(B)
      • B(b);P_PINR(H),SBLOCK::S(F)
      • S(d);N_GUARD,S_CUTB(a)::B(E)
      • S(d);SBLOCK::R(H),XP(h)
      • P(h);SBLOCK::S(I)
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