MESON Chess Problem Database

Problem Display
PID: 205523 (8/3K4/8/n2k4/3P4/4P3/2Q5/8 w - - 0 1)

Pape, Edouard

L'Echiquier Marseillais, 1925

8/3K4/8/n2k4/3P4/4P3/2Q5/8

#2

4 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sb3
      • 2.Qc6#
    • 1...Sc4
      • 2.Qg2#
    • 1...Sc6
      • 2.Qxc6#
    • 1...Sb7
      • 2.Qc6#
  • Tries
    • 1.Qa4?
      • 1...Sb3
        • 2.Qc6#
      • 1...Sc4
        • 2.Qc6#
        • 2.Qa8#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sb7
        • 2.Qc6#
      • 1...Ke4!
    • 1.Qc1?
      • 1...Sb3
        • 2.Qc6#
      • 1...Sc4
        • 2.Qh1#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sb7
        • 2.Qc6#
      • 1...Ke4!
    • 1.Qc7?
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sb3
        • 2.Qc6#
      • 1...Sc4
        • 2.Qc6#
        • 2.Qb7#
      • 1...Sb7
        • 2.Qc6#
      • 1...Ke4!
    • 1.Qc8?
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sb3
        • 2.Qc6#
      • 1...Sc4
        • 2.Qb7#
        • 2.Qc6#
        • 2.Qa8#
      • 1...Sb7
        • 2.Qc6#
      • 1...Ke4!
  • Keys
    • 1.Qd3!
      • threat
        • 2.e4#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • S(a);N_GUARD::QAB1(A)
    • S(a);SBLOCK::QAB(A)
    • S(a);N_GUARD::QAB1(A),XS(a)
  • Tries
    • Try
      • Q(A);
      • Vars
        • S(a);N_GUARD::QAB1(A)
        • S(a);N_GUARD::QAB1(A),XS(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • S(a);N_GUARD::QAB1(A)
        • S(a);SBLOCK::QAB(A)
        • S(a);N_GUARD::QAB1(A),XS(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • S(a);N_GUARD::QAB1(A),XS(a)
        • S(a);N_GUARD::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • S(a);N_GUARD::QAB1(A),XS(a)
        • S(a);N_GUARD::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • P(B)
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