MESON Chess Problem Database

Problem Display
PID: 77158 (8/8/8/8/3P3N/4b3/6Rp/R3K2k w Q - 0 1)

Christiaans, Frank

Neue Osnabrucker Zeitung, 1994

8/8/8/8/3P3N/4b3/6Rp/R3K2k

#2

5 + 3

6114 Problemschach-Jahrbuch (1994) 1995
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bd2+
      • 2.Kxd2#
    • 1...Bf2+
      • 2.Kxf2#
  • Tries
    • 1.Ke2+?
      • 1...Bc1
        • 2.Rxc1#
      • 1...Bg1!
    • 1.Rxh2+?
      • 1...Kg1
        • 2.Sf3#
      • 1...Kxh2!
  • Keys
    • 1.Rf2!
      • 1...Bd2+
        • 2.Kxd2#
      • 1...Bxf2+
        • 2.Kxf2#
      • 1...Kg1
        • 2.Rf1#
      • 1...Bxd4
        • 2.0-0-0#
      • 1...Bc1
        • 2.Rf1#
      • 1...Bf4
        • 2.Rf1#
      • 1...Bg5
        • 2.Rf1#
      • 1...Bh6
        • 2.Rf1#

Anticipated by 23443(1949)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • B(c);CHECK::R(A)+K(B),XB(c)
  • Tries
    • Try
      • K(B);CHECK,P-FLIGHT
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::R(A),XB(c)
      • Refutation
        • B(c);P_SPINB(c)
    • Try
      • R(C);CHECK,XP(b)
      • Vars
        • K(a);P-FLIGHT::S(E)
      • Refutation
        • K(a);P-FLIGHT,XR(C)
  • Actual
    • R(C);
    • Vars
      • B(c);CHECK::R(A)+K(B),XB(c)
      • B(c);CHECK,XR(C)::R(A)+K(B),XB(c)
      • K(a);P-FLIGHT::R1(C)
      • B(c);XP(D)::0-0-0
      • B(c);N_GUARD::R(C)
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