MESON Chess Problem Database

Problem Display
PID: 109284 (Q7/4p3/5RB1/4kPp1/8/5K2/5N2/8 w - - 0 1)

Ryall, Isaac

Toronto Globe, 1882

Q7/4p3/5RB1/4kPp1/8/5K2/5N2/8

#2

6 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf6
      • 2.Qh8#
  • Tries
    • 1.Ke3?
      • threat
        • 2.Sg4#
        • 2.Re6#
      • 1...Kxf6
        • 2.Qh8#
      • 1...e6
        • 2.Rxe6#
      • 1...g4
        • 2.Sxg4#
        • 2.Re6#
      • 1...exf6!
    • 1.Sd3+?
      • 1...Kxf6
        • 2.Qf8#
        • 2.Qh8#
      • 1...Kd4!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Sg4#
        • 2.Re6#
      • 1...g4+
        • 2.Sxg4#
      • 1...Kxf6
        • 2.Qh8#
      • 1...exf6
        • 2.Sd3#
        • 2.Sg4#
      • 1...e6
        • 2.Sd3#
        • 2.Sg4#
        • 2.Rxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);OGATEB,S_FLIGHT,XR(D)::QAB(F)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • K(a);OGATEB,S_FLIGHT,XR(D)::QAB(F)
        • P(c);::R1(D),XP(c)
      • Refutation
        • P(c);XR(D)
    • Try
      • S(A);CHECK
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(F);
    • Threat
      • DUALS(2)
    • Vars
      • P(b);CHECK::S(A),XP(b)
      • K(a);OGATEB,P_SPINP(c),S_FLIGHT,XR(D)::QAB(F)
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