MESON Chess Problem Database

Problem Display
PID: 41797 (1n6/Q7/2nPrP2/2PkB2R/2r1NP2/2P1p1K1/3P1P2/2bR3B w - - 0 1)

Kubbel, Leonid Ivanovich (AKA Kubbel, Karl Artur Leonid)

4th HM., De Problemist, 1929

1n6/Q7/2nPrP2/2PkB2R/2r1NP2/2P1p1K1/3P1P2/2bR3B

#2

14 + 7

20 De Problemist 1930

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc5
      • 2.Qxc5#
    • 1...Rxe5
      • 2.Qf7#
  • Tries
    • 1.Bd4+?
      • 1...Re5
        • 2.Qf7#
      • 1...Se5!
    • 1.dxe3+?
      • 1...Rd4
        • 2.Qa2#
      • 1...Sd4
        • 2.Sg5#
      • 1...Bd2!
  • Keys
    • 1.d4!
      • threat
        • 2.Sd2#
        • 2.Sg5#
      • 1...Rxc3
        • 2.Sd2#
      • 1...Rxd4
        • 2.Qa2#
      • 1...Rxc5
        • 2.Sd2#
        • 2.Qxc5#
      • 1...Rxe5
        • 2.Qf7#
      • 1...Rxd6
        • 2.Sg5#
      • 1...Rxf6
        • 2.Sg5#
      • 1...Sxd4
        • 2.Sg5#
      • 1...Sxe5
        • 2.Sd2#
      • 1...Ra4
        • 2.Sd2#
      • 1...Rb4
        • 2.Sd2#
      • 1...Re7
        • 2.Sg5#
      • 1...Re8
        • 2.Sg5#
      • 1...Bd2
        • 2.Sxd2#
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 1
  • Sets
    • R(c);OGATE,XP(I)::QAR1(N),XR(c)
    • R(f);OGATEB,P_SPINR(f),XB(J)::QAB(N)
  • Tries
    • Try
      • B(J);CHECK
      • Vars
        • R(f);P_SPINR(f),S_CUTS(e)::QAB(N)
      • Refutation
        • S(e);P_SPINS(e)
    • Try
      • P(C);CHECK,XP(b)
      • Vars
        • R(c);P_SPINR(c),S_CUTB(a),S_CUTS(e)::QAB(N)
        • S(e);P_SPINS(e)::B(B)+S(G)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • P(C);
    • Threat
      • DUALS(2)
    • Vars
      • R(c);XP(E)::B(B)+S(G)
      • R(c);OGATEB,P_SPINR(c),XP(C)::QAB(N)
      • R(f);OGATEB,P_SPINR(f),XB(J)::QAB(N)
      • R(f);XP(L)::B(B)+S(G)
      • R(f);XP(M)::B(B)+S(G)
      • S(e);P_SPINS(e),XP(C)::B(B)+S(G)
      • S(e);P_SPINS(e),XB(J)::B(B)+S(G)
      • R(c);::B(B)+S(G)
      • R(f);::B(B)+S(G)
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