MESON Chess Problem Database

Problem Display
PID: 143830 (5B2/1q1P4/1p5K/3k4/QR1N1P2/7B/8/n6b w - - 0 1)

Belli, Niccolo

L'Italia Scacchistica, 1936

(First published on Tue Dec 15 1936)

5B2/1q1P4/1p5K/3k4/QR1N1P2/7B/8/n6b

#2

8 + 5

14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Qa6
      • 2.Qc6#
    • 1...Qc6+
      • 2.Qxc6#
    • 1...Qa8
      • 2.Qxa8#
    • 1...Qa7
      • 2.Qc6#
    • 1...Qb8
      • 2.Qc6#
    • 1...Bg2
      • 2.Bxg2#
    • 1...Be4
      • 2.Be6#
      • 2.Rb5#
      • 2.Qb5#
  • Tries
    • 1.Qb3+?
      • 1...Ke4
        • 2.Sc2#
        • 2.Se2#
        • 2.Sf3#
        • 2.Sb5#
        • 2.Sf5#
        • 2.Sc6#
        • 2.Se6#
      • 1...Sxb3!
    • 1.d8Q+?
      • 1...Qd7
        • 2.Qc6#
        • 2.Qaa8#
      • 1...Ke4!
    • 1.d8R+?
      • 1...Qd7
        • 2.Qc6#
        • 2.Qa8#
      • 1...Ke4!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Qxh1#
      • 1...Qc6+
        • 2.Se6#
      • 1...Ke4
        • 2.Sc2#
        • 2.Sf5#
      • 1...Bg2
        • 2.Bxg2#
      • 1...Bf3
        • 2.Qxf3#
      • 1...Be4
        • 2.Be6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(e);N_GUARD::QAB1(B)
    • Q(e);CHECK,N_GUARD::QAB1(B),XQ(e)
    • Q(e);OGATEB::QAB(B),XQ(e)
    • B(b);N_GUARD::B(A),XB(b)
  • Tries
    • Try
      • Q(B);CHECK
      • Refutation
        • S(a);XQ(B)
    • Try
      • P(G);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • P(G);CHECK
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(B);
    • Threat
      • QAB(B),XB(b)
    • Vars
      • Q(e);CHECK,SBLOCK::QAR(B)+S(D)
      • B(b);N_GUARD::B(A),XB(b)
      • B(b);N_GUARD::QAB(B),XB(b)
      • B(b);SBLOCK::B(A)
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