MESON Chess Problem Database

Problem Display
PID: 2668 (1b4Q1/rp4q1/p1k5/R1N2K2/3p4/8/8/2R5 w - - 0 1)

Schlesinger, John

Source?, 0000

1b4Q1/rp4q1/p1k5/R1N2K2/3p4/8/8/2R5

#2

5 + 7

1679 American Chess Nuts 1868

SOLUTION

  • SOUND
  • Tries
    • 1.Sa4+?
      • 1...Kd6
        • 2.Qe6#
      • 1...Kd7!
    • 1.Sxb7+?
      • 1...Kb6
        • 2.Qb3#
      • 1...Kd7
        • 2.Qe6#
        • 2.Qd8#
      • 1...Kxb7!
    • 1.Sd7+?
      • 1...Kd6
        • 2.Qe6#
      • 1...Kxd7!
    • 1.Qe6+?
      • 1...Bd6
        • 2.Sa4#
        • 2.Sd7#
      • 1...Kc7!
  • Keys
    • 1.Qd5+!
      • 1...Kxd5
        • 2.Sxb7#
      • 1...Kb6
        • 2.Sa4#
      • 1...Kc7
        • 2.Sa4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(E)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(C);CHECK,XP(e)
      • Vars
        • K(c);P-FLIGHT::QAR(E)
      • Refutation
        • K(c);S_FLIGHT,XS(C)
    • Try
      • S(C);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(E)
      • Refutation
        • K(c);S_FLIGHT,XS(C)
    • Try
      • Q(E);CHECK
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • Q(E);CHECK
    • Vars
      • K(c);S_FLIGHT,XQ(E)::R(B)+S(C),XP(e)
      • K(c);P-FLIGHT::S(C)
      • K(c);P-FLIGHT::R(A)+S(C)
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