MESON Chess Problem Database

Problem Display
PID: 78553 (8/1p6/b7/kNQ5/2K5/8/8/8 w - - 0 1)

de Savignac Castelet, G Arnaud

3rd Prize, L'Echiquier de Paris, 1925

8/1p6/b7/kNQ5/2K5/8/8/8

#2

3 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Ka4
      • 2.Qa3#
      • 2.Qb4#
    • 1...Bxb5+
      • 2.Qxb5#
    • 1...b6
      • 2.Qa3#
      • 2.Qb4#
  • Tries
    • 1.Kb3?
      • 1...b6
        • 2.Qb4#
      • 1...Bxb5!
    • 1.Kc3?
      • 1...Ka4
        • 2.Qb4#
      • 1...b6
        • 2.Qb4#
      • 1...Bxb5!
    • 1.Qg1?
      • 1...Ka4
        • 2.Qa1#
      • 1...b6
        • 2.Qa1#
      • 1...Bxb5+!
    • 1.Qf2?
      • 1...Ka4
        • 2.Qa2#
      • 1...b6
        • 2.Qa2#
      • 1...Bxb5+!
    • 1.Qe3?
      • 1...Ka4
        • 2.Qa3#
      • 1...b6
        • 2.Qa3#
      • 1...Bxb5+!
    • 1.Qd4?
      • 1...Ka4
        • 2.Qa1#
      • 1...b6
        • 2.Qa1#
      • 1...Bxb5+!
    • 1.Qd6?
      • 1...Ka4
        • 2.Qa3#
        • 2.Qb4#
      • 1...b6
        • 2.Qa3#
        • 2.Qb4#
      • 1...Bxb5+!
    • 1.Qe7?
      • 1...Ka4
        • 2.Qa3#
        • 2.Qb4#
      • 1...Kb6
        • 2.Qc7#
      • 1...b6
        • 2.Qa3#
        • 2.Qb4#
      • 1...Bxb5+!
  • Keys
    • 1.Qe5!
      • 1...Bxb5+
        • 2.Qxb5#
      • 1...Ka4
        • 2.Qa1#
      • 1...Kb6
        • 2.Qc7#
      • 1...b6
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(b);CHECK,OGATE,P_SPINB(b),XS(B)::QAR1(C),XB(b)
  • Tries
    • Try
      • K(A);N_SPINS(B),S_FLIGHT
      • Vars
        • P(c);SBLOCK::QAB1(C)
      • Refutation
        • B(b);P_SPINB(b),XS(B)
    • Try
      • K(A);N_SPINS(B),P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
        • P(c);SBLOCK::QAB1(C)
      • Refutation
        • B(b);P_SPINB(b),XS(B)
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT::QAR(C)
        • P(c);SBLOCK::QAR(C)
      • Refutation
        • B(b);CHECK,XS(B)
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT::QAR2(C)
        • P(c);SBLOCK::QAR(C)
      • Refutation
        • B(b);CHECK,XS(B)
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
        • P(c);SBLOCK::QAR2(C)
      • Refutation
        • B(b);CHECK,XS(B)
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT::QAR(C)
        • P(c);SBLOCK::QAR(C)
      • Refutation
        • B(b);CHECK,XS(B)
    • Try
      • Q(C);
      • Refutation
        • B(b);CHECK,XS(B)
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT::QAB1(C)
      • Refutation
        • B(b);CHECK,XS(B)
  • Actual
    • Q(C);
    • Vars
      • B(b);CHECK,OGATE,P_SPINB(b),XS(B)::QAR1(C),XB(b)
      • K(a);P-FLIGHT::QAR(C)
      • K(a);S_FLIGHT::QAB1(C)
      • P(c);SBLOCK::QAR(C)
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