MESON Chess Problem Database

Problem Display
PID: 152236 (8/8/6R1/8/4R1qk/3Q1p2/4nK2/8 w - - 0 1)

Richardson, Charles

Good Companions (May), 1914

8/8/6R1/8/4R1qk/3Q1p2/4nK2/8

#2

4 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Rexg4+?
      • 1...Kh5
        • 2.Qb5#
        • 2.Qf5#
        • 2.Qd5#
      • 1...Kh3!
    • 1.Rgxg4+?
      • 1...Kh3
        • 2.Rh4#
      • 1...Kh5!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qxg4#
        • 2.Qh7#
      • 1...Kh3
        • 2.Rh6#
      • 1...Kh5
        • 2.Qxg4#
        • 2.Qh7#
      • 1...Qxe4
        • 2.Qh7#
      • 1...Qf4
        • 2.Qh7#
      • 1...Sg3
        • 2.Qxg4#
      • 1...Sf4
        • 2.Qxg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);CHECK,XQ(c)
      • Refutation
        • K(d);P-FLIGHT,P_SPINP(b)
    • Try
      • R(D);CHECK,XQ(c)
      • Vars
        • K(d);P-FLIGHT,P_SPINP(b)::R1(D)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • Q(B);
    • Threat
      • DUALS(2)
    • Vars
      • K(d);P-FLIGHT::R(D)
      • Q(c);N_SPINQ(c),XR(C)::QAR(B)
      • Q(c);::QAR(B)
      • S(a);::QAR1(B),XQ(c)
      • S(a);N_SPINQ(c)::QAR1(B),XQ(c)
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