MESON Chess Problem Database

Problem Display
PID: 160875 (1r6/pP6/kBB4R/1Rp5/P7/2r2p2/b7/1q2bQ1K w - - 0 1)

Albrecht, Hermann

Providence Journal, 1948

(First published on Thu Apr 1 1948)

1r6/pP6/kBB4R/1Rp5/P7/2r2p2/b7/1q2bQ1K

#2

8 + 9

15601 Albrecht-Leiss-Degener Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb5
      • 2.Qxb5#
    • 1...Rc8
      • 2.bxc8Q#
      • 2.bxc8B#
  • Tries
    • 1.Bd8?
      • threat
        • 2.Ra5#
      • 1...Qxb5
        • 2.Bd5#
        • 2.Qxb5#
        • 2.axb5#
      • 1...Rd3
        • 2.Bd5#
      • 1...Rc4
        • 2.Be4#
      • 1...Rxd8!
  • Keys
    • 1.Bc7!
      • threat
        • 2.Ra5#
      • 1...Qxb5
        • 2.Bd5#
        • 2.Qxb5#
        • 2.axb5#
      • 1...Rd3
        • 2.Bd5#
      • 1...Rc4
        • 2.Be4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(a);OGATE,P_SPINQ(a),XR(D)::QAB1(A),XQ(a)
    • R(i);OGATE::PXR(i)=Q
  • Tries
    • Try
      • B(E);
      • Threat
        • QAB(A)+R(D),DCHECK
      • Vars
        • R(d);S_CUTQ(a)::R(G)+B(F)
        • R(d);S_CUTB(c)::R(G)+B(F)
      • Refutation
        • R(i);XB(E)
  • Actual
    • B(E);
    • Threat
      • QAB(A)+R(D),DCHECK
    • Vars
      • R(d);S_CUTQ(a)::R(G)+B(F)
      • R(d);S_CUTB(c)::R(G)+B(F)
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