MESON Chess Problem Database

Problem Display
PID: 185723 (5KN1/3P3k/p1p1PBN1/3rpB1P/1n4p1/q7/p4n2/bb3r2 w - - 0 1)

Chicco, Adriano

The Observer, 1931

(First published on Sun Jul 5 1931)

5KN1/3P3k/p1p1PBN1/3rpB1P/1n4p1/q7/p4n2/bb3r2

#2

8 + 13

15239 Valois Notebooks 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.Sf4#
      • 2.Sh4#
      • 2.Sxe5#
      • 2.S6e7#
      • 2.Sh8#
    • 1...Sfd3
      • 2.Sf4#
    • 1...Se4
      • 2.Sf4#
    • 1...Sc2+
      • 2.S6e7#
    • 1...Sbd3+
      • 2.S6e7#
    • 1...e4
      • 2.Se5#
  • Tries
    • 1.d8Q?
      • threat
        • 2.Qe7#
      • 1...Sc2+
        • 2.S6e7#
      • 1...Sbd3+
        • 2.S6e7#
      • 1...Rd7
        • 2.Qxd7#
      • 1...Rxd8+!
  • Keys
    • 1.Bg7!
      • threat
        • 2.Sf6#
      • 1...Sc2+
        • 2.S6e7#
      • 1...Sbd3+
        • 2.S6e7#
      • 1...Se4
        • 2.Sf4#
      • 1...e4
        • 2.Se5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • S(e);S_CUTB(b)::B(A)+S(E)
    • S(g);CHECK,S_CUTB(b)::B(A)+S(E)
    • P(j);S_CUTB(b)::B(A)+S(E)
  • Tries
    • Try
      • P(F);
      • Threat
        • QAR(F)
      • Vars
        • S(g);CHECK,S_CUTB(b)::B(A)+S(E)
        • R(i);N_GUARD::QAR(F),XR(i)
      • Refutation
        • R(i);CHECK,XQ(F)
  • Actual
    • B(D);
    • Threat
      • S(H)
    • Vars
      • S(g);CHECK,S_CUTB(b)::B(A)+S(E)
      • S(e);P_PINB(A),S_CUTB(b)::B(A)+S(E)
      • P(j);S_CUTB(b)::B(A)+S(E)
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