MESON Chess Problem Database

Problem Display
PID: 198781 (4nK2/3pN1Bp/5n2/8/4k3/3p1rQ1/3P4/b6B w - - 0 1)

Somma, Francesco

L'Alfiere di Re, 1921

4nK2/3pN1Bp/5n2/8/4k3/3p1rQ1/3P4/b6B

#2

6 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bd4
      • 2.Bxf3#
    • 1...Sg4+
      • 2.Bxf3#
      • 2.Qxf3#
    • 1...Sd5+
      • 2.Bxf3#
      • 2.Qxf3#
    • 1...Sh5+
      • 2.Bxf3#
      • 2.Qxf3#
    • 1...Sg8+
      • 2.Bxf3#
      • 2.Qxf3#
  • Tries
    • 1.Qxf3+?
      • 1...Kd4
        • 2.Qd5#
      • 1...Ke5!
  • Keys
    • 1.Qg5!
      • threat
        • 2.Qe3#
      • 1...Sg4+
        • 2.Qf5#
      • 1...Sd5+
        • 2.Qf5#
      • 1...Sh5+
        • 2.Qf5#
      • 1...Sg8+
        • 2.Qf5#
      • 1...Kd4
        • 2.Qd5#
      • 1...Bd4
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • B(a);SBLOCK::B(A),XR(c)
  • Tries
    • Try
      • Q(C);CHECK,XR(c)
      • Vars
        • K(d);OGATE,P-FLIGHT,P_SPINS(e)::QAR1(C)
      • Refutation
        • K(d);P-FLIGHT,P_SPINS(e)
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • S(e);CHECK::QAB1(C)
      • K(d);N_SPINR(c),P-FLIGHT,P_SPINS(e)::QAR1(C)
      • B(a);SBLOCK::QAB1(C)
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