MESON Chess Problem Database

Problem Display
PID: 169155 (8/5Q2/1r6/8/3p4/8/2R5/rk1K4 w - - 0 1)

Lind, Ingemar

1st Comm., SuperProblem 164. TT, 2016

8/5Q2/1r6/8/3p4/8/2R5/rk1K4

#2

3 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.Qxa2#
    • 1...Rb2
      • 2.Rc1#
    • 1...Rb3
      • 2.Qxb3#
    • 1...Ra6
      • 2.Qb3#
    • 1...Rc6
      • 2.Qb3#
    • 1...Rd6
      • 2.Qb3#
    • 1...Rf6
      • 2.Qb3#
    • 1...Rg6
      • 2.Qb3#
    • 1...Rh6
      • 2.Qb3#
    • 1...Rb7
      • 2.Qxb7#
  • Tries
    • 1.Qf1?
      • threat
        • 2.Kd2#
      • 1...Re6
        • 2.Qb5#
      • 1...Rf6
        • 2.Qb5#
      • 1...Rb2!
  • Keys
    • 1.Qf2!
      • threat
        • 2.Rc1#
      • 1...Rb2
        • 2.Rxb2#
      • 1...Rc6
        • 2.Rb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 8
  • Sets
    • R(a);N_GUARD::QAB1(C),XR(a)
    • R(d);SBLOCK::R1(B)
    • R(d);N_GUARD::QAR2(C),XR(d)
    • R(d);N_GUARD::QAR2(C)
    • R(d);OGATEB::QAR(C),XR(d)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAR(C)+K(A)
      • Vars
        • R(d);N_GUARD::QAR(C)
      • Refutation
        • R(d);
  • Actual
    • Q(C);
    • Threat
      • R1(B)
    • Vars
      • R(d);N_GUARD::R1(B),XR(d)
      • R(d);N_GUARD::R1(B)
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