MESON Chess Problem Database

Problem Display
PID: 2215 (8/8/2R5/3pk3/pQ2p1PK/8/8/8 w - - 0 1)

Cook, Eugene Beauharnais

Source?, 0000

8/8/2R5/3pk3/pQ2p1PK/8/8/8

#2

4 + 4

1679 American Chess Nuts 1868
5454 Near Snap 2020

SOLUTION

  • SOUND
  • Sets
    • 1...d4
      • 2.Qd6#
  • Tries
    • 1.Kg3?
      • 1...d4
        • 2.Qa5#
        • 2.Qc5#
        • 2.Qd6#
        • 2.Qb5#
      • 1...e3
        • 2.Qf4#
      • 1...a3!
    • 1.Kg5?
      • 1...d4
        • 2.Qa5#
        • 2.Qc5#
        • 2.Qd6#
        • 2.Qb5#
      • 1...e3
        • 2.Qf4#
      • 1...a3!
    • 1.Qd2?
      • 1...e3
        • 2.Qxe3#
      • 1...d4
        • 2.Qg5#
      • 1...a3!
    • 1.Qc3+?
      • 1...Kf4
        • 2.Rf6#
        • 2.Qg3#
      • 1...d4!
    • 1.Qd4+?
      • 1...Kf4
        • 2.Rf6#
      • 1...Kxd4!
  • Keys
    • 1.Qa3!
      • 1...Kd4
        • 2.Qc3#
      • 1...Kf4
        • 2.Qg3#
      • 1...e3
        • 2.Qxe3#
      • 1...d4
        • 2.Qd6#

This anticipates 249589(1894), 121223(1987), 158225(1999)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(c);::QAB1(A)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Vars
        • P(b);OGATE::QAB1(A)
      • Refutation
        • P(a);
    • Try
      • K(C);S_FLIGHT
      • Vars
        • P(b);OGATE::QAB1(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • P(b);OGATEB::QAR2(A),XP(b)
        • P(c);SBLOCK::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);CHECK
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);P_SPINP(b),S_FLIGHT::R(D)
      • Refutation
        • K(d);S_FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Vars
      • K(d);S_FLIGHT::QAB1(A)
      • P(b);OGATEB::QAR2(A),XP(b)
      • P(c);::QAB1(A)
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