MESON Chess Problem Database

Problem Display
PID: 161487 (8/1n4K1/2p1p3/R1P1k3/3bN1P1/2N1P3/1Q4n1/4R3 w - - 0 1)

Albrecht, Hermann

O Democrata, 1935

(First published on Sat Sep 7 1935)

8/1n4K1/2p1p3/R1P1k3/3bN1P1/2N1P3/1Q4n1/4R3

#2

9 + 6

15601 Albrecht-Leiss-Degener Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Sxe1
      • 2.Qh2#
    • 1...Sxe3
      • 2.Qh2#
    • 1...Sh4
      • 2.Qh2#
    • 1...Sxa5
      • 2.Qb8#
    • 1...Sxc5
      • 2.Qb8#
    • 1...Sd8
      • 2.Qb8#
  • Tries
    • 1.Qf2?
      • threat
        • 2.Qf6#
        • 2.exd4#
      • 1...Bxe3
        • 2.Qf6#
      • 1...Bxc5
        • 2.Qf6#
      • 1...Sxe3
        • 2.Qg3#
        • 2.Qh2#
        • 2.Qf6#
      • 1...Sf4
        • 2.Qxf4#
        • 2.exd4#
        • 2.exf4#
      • 1...Bxc3!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Sd7#
      • 1...Bxc3
        • 2.Qxc3#
      • 1...Bxe3
        • 2.Scd5#
      • 1...Bxc5
        • 2.Sce4#
      • 1...Sxe3
        • 2.Qh2#
      • 1...Sxc5
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • S(a);OGATE,XR(A)::QAB(B)
    • S(a);OGATE,XP(D)::QAB(B)
    • S(a);OGATE::QAB(B)
    • S(f);OGATE,XR(G)::QAB(B)
    • S(f);OGATE,P_SPINS(f),XP(H)::QAB(B)
    • S(f);OGATE::QAB(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • B(b);XP(D)::QAB1(B)
        • B(b);P_SPINB(b),XP(H)::QAB1(B)
      • Refutation
        • B(b);XS(C)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • B(b);OGATE,P_SPINB(b),XS(C)::QAB(B),XB(b)
      • B(b);P_SPINB(b),XP(D)::QAB(B)+S(C)
      • B(b);P_SPINB(b),XP(H)::QAB(B)+S(C)
      • S(a);OGATE,P_SPINS(a),XP(D)::QAB(B)
      • S(f);OGATE,P_SPINS(f),XP(H)::QAB(B)
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