MESON Chess Problem Database

Problem Display
PID: 94 (bbQ1r3/2qn4/R4P2/1pPkP2R/4NPB1/2P3Pr/1K1N4/1n4B1 w - - 0 1)

Larsen, Karl Adolf Koefoed

Sp. Prize, Schiffmann MT, 1930

bbQ1r3/2qn4/R4P2/1pPkP2R/4NPB1/2P3Pr/1K1N4/1n4B1

#2

14 + 9

1397 Faszinierendes Schachproblem 1963
5862 An ABC of Chess Problems 1970
4640 Chess Wizardry: The New ABC of Chess Problems 1996
133 The Problemist Supplement 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe5
      • 2.Be6#
      • 2.Qg8#
    • 1...Re6
      • 2.Bxe6#
    • 1...Rxc8
      • 2.Be6#
    • 1...Rd8
      • 2.Be6#
    • 1...Rf8
      • 2.Be6#
    • 1...Rg8
      • 2.Be6#
      • 2.Qxg8#
    • 1...Rh8
      • 2.Be6#
    • 1...Sxc3
      • 2.Sxc3#
    • 1...Sxf6
      • 2.Sxf6#
    • 1...b4
      • 2.c4#
  • Keys
    • 1.Bf3!
      • threat
        • 2.Sg5#
      • 1...Qxe5
        • 2.Sf2#
      • 1...Rxg3
        • 2.Sxg3#
      • 1...Rxe5
        • 2.Qg8#
      • 1...Sxd2
        • 2.Sxd2#
      • 1...Sxc3
        • 2.Sxc3#
      • 1...Sxc5
        • 2.Sxc5#
      • 1...Sxe5
        • 2.Sd6#
      • 1...Sxf6
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 6
  • Sets
    • R(i);N_GUARD::B(H),XR(i)
    • R(i);N_GUARD,XQ(N)::B(H)
    • R(i);N_GUARD::B(H)
    • S(a);XP(D)::S(F),XS(a)
    • S(f);XP(M)::S(F),XS(f)
    • P(c);N_GUARD::P(D)
  • Actual
    • B(H);
    • Threat
      • B(H)+S(F)
    • Vars
      • Q(e);P_PINP(D),P_SPINQ(e),XP(J)::B(H)+S(F)
      • R(b);XP(E)::B(H)+S(F),XR(b)
      • R(i);OGATE,P_SPINR(i),XP(J)::QAB(N)
      • S(a);XS(C)::B(H)+S(F),XS(a)
      • S(a);XP(D)::B(H)+S(F),DCHECK,XS(a)
      • S(f);XP(I)::B(H)+S(F),XS(f)
      • S(f);P_SPINS(f),XP(J)::B(H)+S(F)
      • S(f);XP(M)::B(H)+S(F),DCHECK,XS(f)
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Developed and maintained by Brian Stephenson.
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