MESON Chess Problem Database

Problem Display
PID: 104866 (3B4/N4B2/8/2kp4/6QP/8/1K6/8 w - - 0 1)

St Maurice, Ephrem

La Presse, 1923

3B4/N4B2/8/2kp4/6QP/8/1K6/8

#2

6 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Kc3?
      • threat
        • 2.Qb4#
      • 1...d4+
        • 2.Qxd4#
      • 1...Kd6!
    • 1.Bb6+?
      • 1...Kd6
        • 2.Qe6#
      • 1...Kxb6!
    • 1.Qa4?
      • 1...d4
        • 2.Qa3#
      • 1...Kd6!
    • 1.Qd4+?
      • 1...Kd6
        • 2.Qxd5#
      • 1...Kxd4!
    • 1.Qe4?
      • 1...Kd6
        • 2.Qxd5#
        • 2.Qe7#
      • 1...d4
        • 2.Qe7#
      • 1...dxe4!
    • 1.Qg7?
      • 1...Kb4
        • 2.Qd4#
      • 1...Kc4
        • 2.Qc3#
      • 1...d4
        • 2.Qf8#
      • 1...Kd6!
  • Keys
    • 1.Qe2!
      • 1...Kb4
        • 2.Qb5#
      • 1...Kd4
        • 2.Bb6#
      • 1...Kd6
        • 2.Qe7#
      • 1...d4
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Threat
        • QAB1(B)
      • Vars
        • P(b);CHECK::QAB1(B),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(F);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT,XB(F)
    • Try
      • Q(B);
      • Vars
        • P(b);SBLOCK::QAB(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P_SPINP(b),S_FLIGHT::QAR1(B),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XQ(B)
    • Try
      • Q(B);
      • Vars
        • P(b);SBLOCK::QAB(B)
      • Refutation
        • P(b);XQ(B)
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::QAR2(B)
        • K(a);P-FLIGHT,P_SPINP(b)::QAR1(B)
        • P(b);SBLOCK::QAB(B)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(a);S_FLIGHT::QAR1(B)
      • K(a);S_FLIGHT::B(F)
      • K(a);S_FLIGHT::QAB1(B)
      • P(b);SBLOCK::QAB(B)
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