MESON Chess Problem Database

Problem Display
PID: 148417 (8/6p1/3ppnK1/2p1k1PR/R5P1/p3P3/1N5r/B2Q4 w - - 0 1)

Albrecht, Hermann

Danziger Neueste Nachrichten, 1935

(First published on Thu Oct 24 1935)

8/6p1/3ppnK1/2p1k1PR/R5P1/p3P3/1N5r/B2Q4

#2

9 + 8

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb2
      • 2.gxf6#
    • 1...Rc2
      • 2.gxf6#
    • 1...Rd2
      • 2.gxf6#
    • 1...Re2
      • 2.gxf6#
    • 1...Rg2
      • 2.gxf6#
    • 1...Se4
      • 2.Sc4#
    • 1...Sd5
      • 2.Sd3#
    • 1...c4
      • 2.Qd4#
  • Tries
    • 1.Re4+?
      • 1...Sxe4
        • 2.Sc4#
      • 1...Kxe4!
    • 1.Rf4?
      • threat
        • 2.Sc4#
      • 1...Rxb2
        • 2.gxf6#
      • 1...Rd2
        • 2.gxf6#
      • 1...c4
        • 2.Sxc4#
        • 2.Qd4#
      • 1...axb2!
    • 1.Qf3?
      • threat
        • 2.Sd3#
        • 2.Sc4#
      • 1...Rxb2
        • 2.gxf6#
      • 1...Se4
        • 2.Qxe4#
      • 1...d5
        • 2.Sc4#
        • 2.Qg3#
        • 2.Qf4#
      • 1...c4
        • 2.Sd3#
        • 2.Sxc4#
      • 1...axb2!
    • 1.Qd3?
      • threat
        • 2.Sc4#
      • 1...Rxb2
        • 2.gxf6#
      • 1...c4
        • 2.Sxc4#
        • 2.Qd4#
      • 1...axb2!
  • Keys
    • 1.Qd2!
      • threat
        • 2.Sd1#
      • 1...Rxd2
        • 2.gxf6#
      • 1...axb2
        • 2.Bxb2#
      • 1...c4
        • 2.Qd4#
      • 1...d5
        • 2.Qxh2#
      • 1...Se4
        • 2.Sc4#
      • 1...Sd5
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(a);N_GUARD,P_SPINR(a),XS(C)::R(H)+P(G),XS(g)
    • R(a);N_GUARD::R(H)+P(G),XS(g)
    • S(g);SBLOCK::B(A)+S(C),DCHECK
    • P(c);N_GUARD::QAB1(B)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • S(g);SBLOCK,XR(E)::B(A)+S(C),DCHECK
      • Refutation
        • K(d);P-FLIGHT,XR(E)
    • Try
      • R(E);
      • Threat
        • B(A)+S(C),DCHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a),XS(C)::R(H)+P(G),XS(g)
        • R(a);N_GUARD::R(H)+P(G),XS(g)
      • Refutation
        • P(b);P_SPINP(b),XS(C)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);N_GUARD,P_SPINR(a),XS(C)::R(H)+P(G),XS(g)
        • S(g);N_GUARD::QAR1(B),XS(g)
      • Refutation
        • P(b);P_SPINP(b),XS(C)
    • Try
      • Q(B);
      • Threat
        • B(A)+S(C),DCHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a),XS(C)::R(H)+P(G),XS(g)
      • Refutation
        • P(b);P_SPINP(b),XS(C)
  • Actual
    • Q(B);
    • Threat
      • B(A)+S(C)
    • Vars
      • R(a);N_GUARD,XQ(B)::R(H)+P(G),XS(g)
      • P(b);OGATE,P_SPINP(b),XS(C)::B(A),XP(b)
      • P(c);N_GUARD::QAB1(B)
      • P(e);SBLOCK::QAB(B),XR(a)
      • S(g);SBLOCK::B(A)+S(C),DCHECK
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