MESON Chess Problem Database

Problem Display
PID: 193319 (3K4/pN3p2/Qn3n2/2Pk4/3P3R/1P3PN1/2P1P3/B2R4 w - - 0 1)

Larsen, Karl Adolf Koefoed

1st Prize, DSK 02. TT, 1932

3K4/pN3p2/Qn3n2/2Pk4/3P3R/1P3PN1/2P1P3/B2R4

#2

13 + 5

4035 Aarsskrift for DSK 1932

SOLUTION

  • SOUND
  • Sets
    • 1...Sa4
      • 2.Qd6#
      • 2.c4#
    • 1...Sc4
      • 2.bxc4#
    • 1...Sbd7
      • 2.Qd6#
      • 2.c4#
    • 1...Sa8
      • 2.Qd6#
      • 2.c4#
    • 1...Sc8
      • 2.c4#
  • Tries
    • 1.Rh5+?
      • 1...Kc6
        • 2.Sa5#
      • 1...Ke6
        • 2.Re5#
      • 1...Sxh5!
    • 1.Qc4+?
      • 1...Kc6
        • 2.Sa5#
      • 1...Sxc4!
    • 1.Qxb6?
      • threat
        • 2.Qd6#
        • 2.c4#
      • 1...Se4
        • 2.c4#
        • 2.fxe4#
      • 1...Se8
        • 2.c4#
        • 2.e4#
      • 1...axb6!
    • 1.c4+?
      • 1...Kc6
        • 2.Sa5#
      • 1...Sxc4
        • 2.bxc4#
      • 1...Ke6!
  • Keys
    • 1.Rh6!
      • 1...Kc6
        • 2.d5#
      • 1...Ke6
        • 2.d5#
      • 1...Se4
        • 2.fxe4#
      • 1...Sa4
        • 2.Qd6#
        • 2.c4#
      • 1...Sc4
        • 2.bxc4#
      • 1...Sbd7
        • 2.Qd6#
        • 2.c4#
      • 1...Sa8
        • 2.Qd6#
        • 2.c4#
      • 1...Sc8
        • 2.c4#
      • 1...Sg4
        • 2.Rd6#
        • 2.e4#
      • 1...Sh5
        • 2.Rd6#
        • 2.e4#
      • 1...Sfd7
        • 2.Rd6#
        • 2.e4#
      • 1...Sh7
        • 2.Rd6#
        • 2.e4#
      • 1...Se8
        • 2.e4#
      • 1...Sg8
        • 2.Rd6#
        • 2.e4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(b);OGATE::P(E),XS(b)
    • S(b);N_GUARD::P(C)
  • Tries
    • Try
      • R(I);CHECK
      • Vars
        • K(a);P_SPINS(b),S_FLIGHT::S(L)
        • K(a);P_SPINS(b),S_FLIGHT::R1(I)
      • Refutation
        • S(c);XR(I)
    • Try
      • Q(K);CHECK
      • Vars
        • K(a);S_FLIGHT::S(L)
      • Refutation
        • S(b);XQ(K)
    • Try
      • Q(K);XS(b)
      • Threat
        • DUALS(2)
      • Refutation
        • P(d);XQ(K)
    • Try
      • P(C);CHECK
      • Vars
        • K(a);P_SPINS(b),S_FLIGHT::S(L)
        • S(b);OGATE,XP(C)::P(E),XS(b)
      • Refutation
        • K(a);P_SPINS(b),S_FLIGHT
  • Actual
    • R(I);
    • Vars
      • K(a);OGATE,P_SPINS(b),S_FLIGHT::P(H)
      • S(c);OGATE::P(F),XS(c)
      • S(b);OGATE::P(E),XS(b)
      • S(b);N_GUARD::P(C)
      • S(c);N_GUARD::P(D)
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