MESON Chess Problem Database

Problem Display
PID: 50976 (3K4/8/1Rqk4/4p3/4P3/8/8/6Q1 w - - 0 1)

Chiamulera, Francesco

Die Schwalbe, 1934

3K4/8/1Rqk4/4p3/4P3/8/8/6Q1

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Qg6#
    • 1...Qxb6+
      • 2.Qxb6#
  • Tries
    • 1.Ra6?
      • 1...Qb6+
        • 2.Rxb6#
        • 2.Qxb6#
      • 1...Ke6
        • 2.Qg6#
      • 1...Qxa6!
    • 1.Qe3?
      • 1...Qxb6+
        • 2.Qxb6#
      • 1...Ke6!
    • 1.Qc5+?
      • 1...Ke6
        • 2.Qe7#
      • 1...Kxc5!
    • 1.Qb1?
      • 1...Qxb6+
        • 2.Qxb6#
      • 1...Kc5
        • 2.Qb4#
      • 1...Ke6!
  • Keys
    • 1.Qf2!
      • 1...Qxb6+
        • 2.Qxb6#
      • 1...Ke6
        • 2.Rxc6#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT::QAR2(A)
    • Q(b);CHECK,N_SPINQ(b),OGATE,XR(C)::QAR2(A),XQ(b)
  • Tries
    • Try
      • R(C);
      • Vars
        • K(c);P-FLIGHT::QAR2(A)
      • Refutation
        • Q(b);N_SPINQ(b),XR(C)
    • Try
      • Q(A);
      • Vars
        • Q(b);CHECK,N_SPINQ(b),OGATE,XR(C)::QAR2(A),XQ(b)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);OGATE,P-FLIGHT::QAR1(A)
      • Refutation
        • K(c);N_SPINQ(b),S_FLIGHT,XQ(A)
    • Try
      • Q(A);
      • Vars
        • Q(b);CHECK,N_SPINQ(b),OGATE,XR(C)::QAR2(A),XQ(b)
        • K(c);N_SPINQ(b),S_FLIGHT::QAB1(A)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • Q(A);
    • Vars
      • Q(b);CHECK,N_SPINQ(b),OGATE,XR(C)::QAR2(A),XQ(b)
      • K(c);P-FLIGHT::R(C),XQ(b)
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