MESON Chess Problem Database

Problem Display
PID: 23462 (r3k1n1/1R6/8/8/1Q6/8/8/4K2R w Kq - 0 1)

Christiaans, Frank

Neue Osnabrucker Zeitung, 1993

r3k1n1/1R6/8/8/1Q6/8/8/4K2R

#2

4 + 3

6113 Problemschach-Jahrbuch (1993) 1994
2786 More Fun with Chess Miniatures 2000

SOLUTION

  • SOUND
  • Sets
    • 1...Kd8
      • 2.Qf8#
    • 1...Sf6
      • 2.Qe7#
    • 1...Sh6
      • 2.Qe7#
    • 1...Se7
      • 2.Qxe7#
  • Tries
    • 1.Qa4+?
      • 1...Kd8
        • 2.Qd7#
        • 2.Qxa8#
      • 1...Kf8
        • 2.Qxa8#
      • 1...Rxa4!
    • 1.Qb5+?
      • 1...Kd8
        • 2.Qd7#
      • 1...Kf8!
  • Keys
    • 1.0-0!
      • threat
        • 2.Rf8#
        • 2.Qf8#
      • 1...Kd8
        • 2.Rf8#
        • 2.Qf8#
      • 1...0-0-0
        • 2.Rc1#
      • 1...Ra1
        • 2.Qf8#
      • 1...Sf6
        • 2.Qe7#
      • 1...Se7
        • 2.Qxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • K(b);P-FLIGHT::QAR2(C)
    • S(c);N_GUARD::QAR1(C)
    • S(c);N_GUARD::QAR1(C),XS(c)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR(C),XR(a)
      • Refutation
        • R(a);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • K(A);0-0
    • Threat
      • DUALS(2)
    • Vars
      • K(b);0-0-0,OGATEB::R(B)
      • R(a);P_PINR(B)::QAR1(C)
      • S(c);N_GUARD::QAR1(C)
      • S(c);N_GUARD::QAR1(C),XS(c)
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