MESON Chess Problem Database

Problem Display
PID: 208235 (K7/n4p2/3pp3/R3N1Q1/1p1kN1P1/4Rp2/4qP2/2n1B3 w - - 0 1)

Beck, Friedrich

Deutsche Schachblatter, 1940

K7/n4p2/3pp3/R3N1Q1/1p1kN1P1/4Rp2/4qP2/2n1B3

#2

9 + 9

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qc4
      • 2.Sxf3#
    • 1...Qxe3
      • 2.Qxe3#
    • 1...b3
      • 2.Bc3#
  • Tries
    • 1.Sxd6?
      • threat
        • 2.Qf4#
      • 1...Qxe3
        • 2.Qxe3#
        • 2.fxe3#
      • 1...Qb5
        • 2.Sxf3#
      • 1...Sb5
        • 2.Sc6#
      • 1...Qd3
        • 2.Sxf3#
      • 1...Qc2
        • 2.Sxf3#
      • 1...Sd3!
    • 1.Sxf3+?
      • 1...Kc4
        • 2.Sxd6#
      • 1...Qxf3!
    • 1.Sc6+?
      • 1...Kc4
        • 2.Sxd6#
      • 1...Sxc6!
  • Keys
    • 1.Sd2!
      • threat
        • 2.Qf4#
      • 1...Qxe3
        • 2.Qxe3#
      • 1...dxe5
        • 2.Qd8#
        • 2.Qxe5#
      • 1...Qd3
        • 2.Sdxf3#
      • 1...Qb5
        • 2.Sexf3#
      • 1...Sd3
        • 2.Sb3#
      • 1...Sb5
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • Q(b);N_GUARD,SBLOCK::S(G),XP(c)
    • Q(b);OGATE,XR(C)::QAB1(H),XQ(b)
    • P(d);N_GUARD::B(A)
  • Tries
    • Try
      • S(D);XP(f)
      • Threat
        • QAR2(H)
      • Vars
        • Q(b);N_GUARD::S(G),XP(c)
        • S(h);N_GUARD::S(G)
      • Refutation
        • S(a);
    • Try
      • S(G);CHECK,XP(c)
      • Vars
        • K(e);P-FLIGHT::S(D),XP(f)
      • Refutation
        • Q(b);P_PINS(D),XS(G)
    • Try
      • S(G);CHECK
      • Vars
        • K(e);P-FLIGHT::S(D),XP(f)
      • Refutation
        • S(h);XS(G)
  • Actual
    • S(D);
    • Threat
      • QAR2(H)
    • Vars
      • Q(b);OGATE,XR(C)::QAB1(H),XQ(b)
      • Q(b);N_GUARD::S(D),XP(c)
      • Q(b);N_GUARD::S(G),XP(c)
      • S(a);N_GUARD::S(D)
      • S(h);N_GUARD::S(G)
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