MESON Chess Problem Database

Problem Display
PID: 9923 (8/8/8/2K5/8/5B1R/2k5/5Q1r w - - 0 1)

van Dijk, Nils Gustav Gerard

2nd HM., Skakbladet Miniature TT, 1960

8/8/8/2K5/8/5B1R/2k5/5Q1r

#2

4 + 2

4884 154 norske miniatyrproblemer 1974
3242 BCPS Rapid Solving (Cheltenham) 2001

SOLUTION

  • SOUND
  • Tries
    • 1.Qe2+?
      • 1...Kb1
        • 2.Rxh1#
      • 1...Kc1
        • 2.Rxh1#
      • 1...Kc3
        • 2.Bxh1#
      • 1...Kb3!
    • 1.Qg2+?
      • 1...Kb1
        • 2.Rxh1#
      • 1...Kc1
        • 2.Rxh1#
      • 1...Kb3
        • 2.Bd1#
      • 1...Kd3
        • 2.Be4#
      • 1...Kc3!
  • Keys
    • 1.Qf2+!
      • 1...Kb1
        • 2.Rxh1#
      • 1...Kc1
        • 2.Rxh1#
      • 1...Kb3
        • 2.Bd1#
      • 1...Kc3
        • 2.Bxh1#
      • 1...Kd3
        • 2.Bxh1#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::R(C),XR(a)
        • K(b);P-FLIGHT::R(C),XR(a)
        • K(b);P-FLIGHT::R(C)+B(B),XR(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::R(C),XR(a)
        • K(b);P-FLIGHT::R(C),XR(a)
        • K(b);S_FLIGHT::R(C)+B(B),DCHECK
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(A);CHECK
    • Vars
      • K(b);S_FLIGHT::R(C),XR(a)
      • K(b);P-FLIGHT::R(C),XR(a)
      • K(b);S_FLIGHT::R(C)+B(B),DCHECK
      • K(b);P-FLIGHT::R(C)+B(B),XR(a)
      • K(b);S_FLIGHT::R(C)+B(B),XR(a)
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