MESON Chess Problem Database

Problem Display
PID: 35371 (4R2b/5n2/4b1N1/3B4/3p4/QN1pk3/3R4/K1Bn3r w - - 0 1)

Knoppel, Jan Heribert

1st Comm., Sydsvenska Dagbladet Snallposten, 1938

4R2b/5n2/4b1N1/3B4/3p4/QN1pk3/3R4/K1Bn3r

#2

8 + 8

3680 Jan Knoppel Udvalgte Skakproblemer 1955

SOLUTION

  • SOUND
  • Tries
    • 1.Sa5?
      • threat
        • 2.Sc4#
        • 2.Ra2#
        • 2.Rb2#
        • 2.Rc2#
        • 2.Rg2#
        • 2.Rh2#
        • 2.Qxd3#
      • 1...Rh2
        • 2.Sc4#
        • 2.Rg2#
        • 2.Rxh2#
        • 2.Qxd3#
      • 1...Sf2
        • 2.Sc4#
      • 1...Sc3
        • 2.Sc4#
      • 1...Se5
        • 2.Ra2#
        • 2.Rb2#
        • 2.Rc2#
        • 2.Rg2#
        • 2.Rh2#
      • 1...Sd6
        • 2.Ra2#
        • 2.Rb2#
        • 2.Rc2#
        • 2.Rg2#
        • 2.Rh2#
        • 2.Qxd3#
      • 1...Sb2!
    • 1.Sf4?
      • threat
        • 2.Sg2#
        • 2.Re2#
      • 1...Rg1
        • 2.Re2#
      • 1...Rh2
        • 2.Re2#
      • 1...Kxf4!
  • Keys
    • 1.Sxd4!
      • threat
        • 2.Qxd3#
      • 1...Bxd4+
        • 2.Rb2#
      • 1...Kxd4
        • 2.Rxd3#
      • 1...Sb2
        • 2.Sc2#
        • 2.Sf5#
      • 1...Sf2
        • 2.Rxd3#
      • 1...Sc3
        • 2.Sf5#
      • 1...Se5
        • 2.Sc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);P_PINP(c)
      • Threat
        • DUALS(7)
      • Vars
        • S(a);P_PINB(B)::S(E)
        • S(a);N_SPINP(c),P_PINB(B)::S(E)
      • Refutation
        • S(a);P_PINB(B)
    • Try
      • S(G);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);::B(B)+R(C),DCHECK
      • Refutation
        • K(d);N_SPINB(f),S_FLIGHT,XS(G)
  • Actual
    • S(E);P_PINP(c),P_SPINS(E),XP(e)
    • Threat
      • QAR1(D),XP(c)
    • Vars
      • B(h);CHECK,SBLOCK,XS(E)::B(B)+R(C)
      • K(d);N_SPINB(f),S_FLIGHT,XS(E)::R1(C),XP(c)
      • S(a);P_PINB(B),SBLOCK::B(B)+R(C),DCHECK,XP(c)
      • S(a);N_PINS(E),N_SPINP(c),P_PINB(B)::S(E)
      • S(g);N_PINS(E),N_SPINB(f)::S(E)
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