MESON Chess Problem Database

Problem Display
PID: 156897 (Qn6/p3p2p/Rn2pk1P/1Rp1N1p1/6P1/5NK1/3P4/B7 w - - 0 1)

Abruzzesi, Domenico

L'Alfiere di Re, 1921

Qn6/p3p2p/Rn2pk1P/1Rp1N1p1/6P1/5NK1/3P4/B7

#2

10 + 9

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Sxa6
      • 2.Qf8#
      • 2.Qh8#
    • 1...Sc6
      • 2.Qf8#
      • 2.Qh8#
    • 1...Sd7
      • 2.Qh8#
  • Tries
    • 1.Rbxb6?
      • threat
        • 2.Rxe6#
      • 1...Sxa6
        • 2.Qf8#
        • 2.Qh8#
      • 1...Sc6
        • 2.Qf8#
        • 2.Qh8#
      • 1...axb6!
    • 1.Qxb8?
      • threat
        • 2.Qf8#
        • 2.Qh8#
      • 1...Sd7
        • 2.Qh8#
      • 1...Sc8!
  • Keys
    • 1.Sd4!
      • 1...Kxe5
        • 2.Sf5#
      • 1...Sxa8
        • 2.Rxe6#
      • 1...Sxa6
        • 2.Qh8#
      • 1...cxd4
        • 2.Qf3#
      • 1...Sa4
        • 2.Rxe6#
      • 1...Sc4
        • 2.Rxe6#
      • 1...Sd5
        • 2.Rxe6#
      • 1...S6d7
        • 2.Rxe6#
      • 1...Sc8
        • 2.Rxe6#
      • 1...Sc6
        • 2.Qh8#
      • 1...S8d7
        • 2.Qh8#
      • 1...c4
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • S(i);OGATE::QAB(J)
  • Tries
    • Try
      • R(F);P_PINP(d),XS(c)
      • Threat
        • R1(F),XP(d)
      • Refutation
        • P(f);N_SPINP(d),XR(F)
    • Try
      • Q(J);XS(i)
      • Threat
        • DUALS(2)
      • Vars
        • S(c);P_SPINP(d)::QAB(J)
      • Refutation
        • S(c);P_SPINP(d)
  • Actual
    • S(C);
    • Vars
      • K(e);P_SPINP(a),S_FLIGHT,XS(G)::B(A)+S(C)
      • S(c);OGATE,P_SPINP(d),XQ(J)::R1(H),XP(d)
      • S(i);OGATE,XR(H)::QAB(J)
      • P(a);XS(C)::QAR(J)
      • S(c);OGATE,P_SPINP(d)::R1(H),XP(d)
      • S(i);OGATE::QAB(J)
      • P(a);::QAR(J)
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