MESON Chess Problem Database

Problem Display
PID: 28734 (8/3p4/5B2/3k4/4N1P1/8/2Q2K2/8 w - - 0 1)

St Maurice, Charles-Ephrem

La Patrie, 1923

8/3p4/5B2/3k4/4N1P1/8/2Q2K2/8

#2

5 + 2

655 La Presse 1943
3248 Miniatures canadiennes 2000
3713 Snap 2001
5454 Near Snap 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qb3+?
      • 1...Kxe4
        • 2.Qc4#
        • 2.Qf3#
      • 1...Kc6!
    • 1.Qa2+?
      • 1...Kxe4
        • 2.Qc4#
      • 1...Kc6!
    • 1.Qc5+?
      • 1...Kxe4
        • 2.Qd4#
        • 2.Qc4#
        • 2.Qf5#
      • 1...Ke6!
  • Keys
    • 1.Qc8!
      • 1...Kxe4
        • 2.Qc4#
      • 1...Ke6
        • 2.Qg8#
      • 1...d6
        • 2.Sc3#

Anticipated by 5141(1900), 181855(1905), 187765(1909), 193920(1916), 21242(1917)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT,XS(C)::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT,XS(C)::QAR2(A)
      • K(a);P_SPINP(b),S_FLIGHT::QAB(A)
      • P(b);SBLOCK::S(C)
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