MESON Chess Problem Database

Problem Display
PID: 234736 (1K2k2q/8/3Q4/1R5N/R7/8/8/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2013

1K2k2q/8/3Q4/1R5N/R7/8/8/8

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Rb7?
      • threat
        • 2.Qe7#
      • 1...Qf6
        • 2.Sxf6#
      • 1...Qg7
        • 2.Sxg7#
      • 1...Qh7
        • 2.Sf6#
      • 1...Qf8
        • 2.Qd7#
      • 1...Qe5!
    • 1.Qe6+?
      • 1...Kd8
        • 2.Rd5#
      • 1...Kf8!
  • Keys
    • 1.Ra7!
      • threat
        • 2.Qe7#
      • 1...Qe5
        • 2.Rxe5#
      • 1...Qf6
        • 2.Sxf6#
      • 1...Qg7
        • 2.Sxg7#
      • 1...Qh7
        • 2.Sf6#
      • 1...Qf8
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);
      • Threat
        • QAR1(D)
      • Vars
        • Q(b);N_GUARD::S(C),XQ(b)
        • Q(b);N_GUARD::S(C)
        • Q(b);SBLOCK::QAB1(D)
      • Refutation
        • Q(b);P_PINQ(D)
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);P-FLIGHT::R(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • R(A);
    • Threat
      • QAR1(D)
    • Vars
      • Q(b);N_GUARD,P_PINQ(D)::R(B),XQ(b)
      • Q(b);N_GUARD::S(C),XQ(b)
      • Q(b);N_GUARD::S(C)
      • Q(b);SBLOCK::QAB1(D)
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