MESON Chess Problem Database

Problem Display
PID: 214764 (8/8/K7/2pk4/2N5/5R1Q/8/8 w - - 0 1)

Rhaun, WH

Detroit Free Press, 1878

8/8/K7/2pk4/2N5/5R1Q/8/8

#2

4 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Rd3+?
      • 1...Ke4
        • 2.Qf3#
      • 1...Kc6
        • 2.Qd7#
        • 2.Qc8#
      • 1...Kxc4!
    • 1.Qf5+?
      • 1...Kxc4
        • 2.Qe4#
      • 1...Kd4
        • 2.Qd3#
      • 1...Kc6!
    • 1.Qd7+?
      • 1...Ke4
        • 2.Qd3#
      • 1...Kxc4!
  • Keys
    • 1.Qh7!
      • 1...Kxc4
        • 2.Qe4#
      • 1...Kd4
        • 2.Qd3#
      • 1...Kc6
        • 2.Qb7#
      • 1...Ke6
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT,XS(C)
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);S_FLIGHT,XS(C)::QAR2(B)
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT,XS(C)
  • Actual
    • Q(B);
    • Vars
      • K(b);S_FLIGHT,XS(C)::QAR2(B)
      • K(b);P-FLIGHT::QAR1(B)
      • K(b);S_FLIGHT::QAB1(B)
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