MESON Chess Problem Database

Problem Display
PID: 7745 (2B5/2p5/2k2p1R/Kp6/1B2N3/2N2r2/8/2R5 w - - 0 1)

Menzel, Ralf

Landeszeitung fur die Luneburger Heide, 1993

2B5/2p5/2k2p1R/Kp6/1B2N3/2N2r2/8/2R5

#2

7 + 5

6113 Problemschach-Jahrbuch (1993) 1994
5454 Near Snap 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Re3
      • 2.Rxf6#
    • 1...Rg3
      • 2.Rxf6#
    • 1...Rh3
      • 2.Rxf6#
  • Tries
    • 1.Sd5+?
      • 1...Rc3
        • 2.Se7#
      • 1...Kxd5!
    • 1.Rh5?
      • threat
        • 2.Rc5#
      • 1...Rxc3
        • 2.Rxc3#
      • 1...f5
        • 2.Rh6#
      • 1...Rf5!
  • Keys
    • 1.Sxf6!
      • 1...Rxc3
        • 2.Rxc3#
      • 1...Rxf6
        • 2.Rxf6#
      • 1...Rf1
        • 2.Sd1#
      • 1...Rf2
        • 2.Se2#
      • 1...Rd3
        • 2.Sfd5#
      • 1...Re3
        • 2.Sfe4#
      • 1...Rg3
        • 2.Sg4#
      • 1...Rh3
        • 2.Sh5#
      • 1...Rf4
        • 2.Sce4#
      • 1...Rf5
        • 2.Scd5#

Anticipated by 194011(1917), 234845(1983)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • R(a);N_GUARD::R(F),XP(d)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • R(a);P_SPINR(a)::S(B)
      • Refutation
        • K(c);N_SPINP(d),S_FLIGHT,XS(B)
    • Try
      • R(F);N_PINP(d)
      • Threat
        • R1(F)
      • Vars
        • R(a);OGATE,P_SPINR(a),XS(B)::R(A),XR(a)
        • P(d);OGATEB::R(F)
      • Refutation
        • R(a);
  • Actual
    • S(D);XP(d)
    • Vars
      • R(a);OGATE,P_SPINR(a),XS(B)::R(A),XR(a)
      • R(a);OGATE,P_SPINR(a),XS(D)::R(F),XR(a)
      • R(a);N_GUARD::R(A)+S(B)
      • R(a);N_GUARD::R(F)+S(D)
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