MESON Chess Problem Database

Problem Display
PID: 108207 (8/1R6/8/k2K4/8/8/Np6/R1n5 w - - 0 1)

Bie, Hans Petter

Springaren, 2001

8/1R6/8/k2K4/8/8/Np6/R1n5

#2

4 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ka4
      • 2.Sc3#
    • 1...Sxa2
      • 2.Rxa2#
  • Tries
    • 1.Rxb2?
      • threat
        • 2.Sxc1#
      • 1...Ka4
        • 2.Sxc1#
        • 2.Sc3#
      • 1...Ka6
        • 2.Sxc1#
      • 1...Sxa2
        • 2.Raxa2#
      • 1...Se2
        • 2.Sc1#
        • 2.Sc3#
      • 1...Sd3
        • 2.Sc1#
        • 2.Sc3#
      • 1...Sb3!
  • Keys
    • 1.Kc6!
      • threat
        • 2.Ra7#
      • 1...Ka4
        • 2.Sc3#
      • 1...Ka6
        • 2.Sb4#
      • 1...Sxa2
        • 2.Rxa2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT::R(A)+S(B),DCHECK
    • S(a);OGATE,P_SPINS(a),XS(B)::R(A),XS(a)
  • Tries
    • Try
      • R(D);XP(b)
      • Threat
        • R(A)+S(B),XS(a)
      • Vars
        • K(c);P-FLIGHT::R(A)+S(B),XS(a)
        • S(a);OGATE,P_SPINS(a),XS(B)::R(A),XS(a)
      • Refutation
        • S(a);
  • Actual
    • K(C);S_FLIGHT
    • Threat
      • R(D)
    • Vars
      • K(c);P-FLIGHT::R(A)+S(B),DCHECK
      • S(a);OGATE,P_SPINS(a),XS(B)::R(A),XS(a)
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