MESON Chess Problem Database

Problem Display
PID: 55392 (4Qb2/1bB5/q1p5/pBkn2Rr/7R/4PN2/K2P4/4Nr2 w - - 0 1)

Pirrone, Santi

6th HM., Castellari Festival (Boletim da UBP), 1963

4Qb2/1bB5/q1p5/pBkn2Rr/7R/4PN2/K2P4/4Nr2

#2

10 + 9

3747 FIDE Album (1962-1964) 1968

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb5
      • 2.Qxf8#
    • 1...cxb5
      • 2.Sd3#
  • Tries
    • 1.Bxa6?
      • threat
        • 2.Sd3#
        • 2.Rc4#
        • 2.Qxf8#
      • 1...Rxe1
        • 2.Rc4#
        • 2.Qxf8#
      • 1...Rxf3
        • 2.Sd3#
        • 2.Rc4#
      • 1...Rxh4
        • 2.Sd3#
        • 2.Qxf8#
      • 1...Rxg5
        • 2.Sd3#
        • 2.Rc4#
      • 1...Rh6
        • 2.Sd3#
        • 2.Rc4#
      • 1...Rh7
        • 2.Sd3#
        • 2.Rc4#
      • 1...Rh8
        • 2.Sd3#
        • 2.Rc4#
      • 1...Bd6
        • 2.Sd3#
        • 2.Rc4#
      • 1...Bh6
        • 2.Sd3#
        • 2.Rc4#
        • 2.Qe7#
      • 1...Be7
        • 2.Sd3#
        • 2.Rc4#
        • 2.Qxe7#
      • 1...Bg7
        • 2.Sd3#
        • 2.Rc4#
        • 2.Qe7#
      • 1...Bxa6!
    • 1.Rxd5+?
      • 1...Kxd5
        • 2.Rxh5#
      • 1...cxd5
        • 2.Sd3#
      • 1...Rxd5!
    • 1.Qe4?
      • threat
        • 2.Qc4#
      • 1...Kxb5
        • 2.Qc4#
      • 1...Qxb5
        • 2.Qd4#
      • 1...cxb5
        • 2.Qc2#
      • 1...Rxh4!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Sd3#
      • 1...Kb4
        • 2.Sd3#
      • 1...Qxb5
        • 2.Se6#
      • 1...Rxe1
        • 2.Qxf8#
      • 1...cxb5
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(f);SBLOCK,XB(G)::QAB(J),XB(i)
    • P(g);XB(G)::S(A)
  • Tries
    • Try
      • B(G);XQ(f)
      • Threat
        • DUALS(3)
      • Refutation
        • B(h);XB(G)
    • Try
      • R(H);CHECK,XS(d)
      • Vars
        • K(c);P-FLIGHT,XR(H)::R(F),XR(e)
        • P(g);SBLOCK,XR(H)::S(A)
      • Refutation
        • R(e);XR(H)
    • Try
      • Q(J);
      • Threat
        • QAR1(J)
      • Vars
        • K(c);P-FLIGHT,XB(G)::QAB1(J)
        • Q(f);SBLOCK,XB(G)::QAB1(J)
        • P(g);SBLOCK,XB(G)::QAR(J)
      • Refutation
        • R(e);XR(F)
  • Actual
    • S(E);
    • Threat
      • S(A)
    • Vars
      • K(c);N_SPINS(d),S_FLIGHT::S(A)
      • Q(f);SBLOCK,XB(G)::S(E)
      • R(a);N_GUARD,XS(A)::QAB(J),XB(i)
      • P(g);XB(G)::S(E)
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