MESON Chess Problem Database

Problem Display
PID: 104879 (2Q5/8/5K2/3pp3/2Nk4/8/1P6/5B2 w - - 0 1)

St Maurice, Ephrem

La Presse, 1942

2Q5/8/5K2/3pp3/2Nk4/8/1P6/5B2

#2

5 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qg4#
  • Tries
    • 1.Qd7?
      • 1...Ke4
        • 2.Qg4#
      • 1...e4
        • 2.Qa7#
      • 1...Kc5!
    • 1.Qc5+?
      • 1...Ke4
        • 2.Qe3#
      • 1...Kxc5!
    • 1.Qc7?
      • 1...dxc4
        • 2.Qxe5#
      • 1...e4
        • 2.Qb6#
        • 2.Qa7#
      • 1...Ke4!
    • 1.Qb8?
      • 1...Kc5
        • 2.Qb6#
      • 1...dxc4
        • 2.Qxe5#
      • 1...e4
        • 2.Qa7#
        • 2.Qb6#
      • 1...Ke4!
    • 1.Qd8?
      • 1...Kc5
        • 2.Qb6#
      • 1...e4
        • 2.Qb6#
      • 1...Ke4!
  • Keys
    • 1.Qe6!
      • 1...Ke4
        • 2.Qg4#
      • 1...Kc5
        • 2.Qb6#
      • 1...dxc4
        • 2.Qxe5#
      • 1...e4
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR2(E)
  • Tries
    • Try
      • Q(E);P_PINP(b)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAR2(E)
        • P(c);SBLOCK::QAB(E)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT,XQ(E)
    • Try
      • Q(E);
      • Vars
        • P(b);XS(C)::QAB1(E),XP(c)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::QAB1(E)
        • P(b);XS(C)::QAB1(E),XP(c)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);P_PINP(b)
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAB1(E)
        • P(c);SBLOCK::QAB(E)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(a);P-FLIGHT,P_SPINP(c)::QAR2(E)
      • K(a);S_FLIGHT::QAB1(E)
      • P(b);XS(C)::QAB1(E),XP(c)
      • P(c);SBLOCK::QAB(E)
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Developed and maintained by Brian Stephenson.
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