MESON Chess Problem Database

Problem Display
PID: 143937 (6b1/4R3/KN2rPp1/1Pp1k1pN/5pB1/3Pq3/2P2Q1B/2b1R3 w - - 0 1)

Emiliani, E

La Settimana Enigmistica, 1933

(First published on Sat Feb 4 1933)

6b1/4R3/KN2rPp1/1Pp1k1pN/5pB1/3Pq3/2P2Q1B/2b1R3

#2

12 + 9

14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe1
      • 2.Qxc5#
    • 1...Qe2
      • 2.Qxc5#
    • 1...Qe4
      • 2.Qxc5#
  • Tries
    • 1.Bxf4+?
      • 1...gxf4
        • 2.Qxf4#
      • 1...Kd4!
    • 1.Qxe3+?
      • 1...Kd6
        • 2.Rd7#
      • 1...Bxe3!
  • Keys
    • 1.Sxf4!
      • threat
        • 2.Sxe6#
      • 1...Kd4
        • 2.Se2#
      • 1...Kd6
        • 2.Sc4#
      • 1...Kxf6
        • 2.Sd5#
      • 1...Qxe1
        • 2.Sxg6#
      • 1...Rxe7
        • 2.Se6#
      • 1...gxf4
        • 2.Qxf4#
      • 1...Qe2
        • 2.Sxg6#
      • 1...Qe4
        • 2.Sxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • Q(b);N_SPINQ(b),OGATE,XR(A)::QAR2(C),XP(d)
    • Q(b);OGATE::QAR2(C),XP(d)
  • Tries
    • Try
      • B(D);CHECK,XP(c)
      • Vars
        • P(f);OGATE,XB(D)::QAB1(C),XP(f)
      • Refutation
        • K(e);N_SPINR(g),S_FLIGHT
    • Try
      • Q(C);CHECK,XQ(b)
      • Vars
        • K(e);N_PINS(J),N_SPINR(g),S_FLIGHT::R1(L)
      • Refutation
        • B(a);P_SPINB(a),XQ(C)
  • Actual
    • S(H);XP(c)
    • Threat
      • B(D)+S(H),XR(g)
    • Vars
      • K(e);N_SPINR(g),S_FLIGHT::S(H)
      • K(e);N_PINS(J),N_SPINQ(b),N_SPINR(g),S_FLIGHT::S(J)
      • K(e);N_SPINQ(b),N_SPINR(g),S_FLIGHT,XP(K)::QAR(C)+S(H),DCHECK
      • Q(b);N_SPINQ(b),XR(A)::B(D)+S(H),DCHECK,XP(h)
      • R(g);N_PINS(J),N_SPINR(g),XR(L)::B(D)+S(H)
      • P(f);OGATE,P_SPINP(f),XS(H)::QAB1(C),XP(f)
      • Q(b);::B(D)+S(H),DCHECK,XP(h)
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