MESON Chess Problem Database

Problem Display
PID: 6955 (1BN1R3/p2k1PnK/Nb2n3/1Pr4p/2p1Q3/3b3B/8/3R4 w - - 0 1)

Kish, Alexander

Chess, 1935

1BN1R3/p2k1PnK/Nb2n3/1Pr4p/2p1Q3/3b3B/8/3R4

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rf5
      • 2.Qc6#
    • 1...Rc6
      • 2.bxc6#
    • 1...Ba5
      • 2.Sxc5#
    • 1...Bc7
      • 2.Sxc5#
    • 1...Sf5
      • 2.Qxe6#
  • Tries
    • 1.Rxd3+?
      • 1...Rd5
        • 2.Rxd5#
        • 2.Qxd5#
      • 1...cxd3!
    • 1.Qxd3+?
      • 1...Rd5
        • 2.Qxd5#
      • 1...cxd3!
    • 1.f8Q?
      • threat
        • 2.Re7#
        • 2.Qe7#
        • 2.Qf7#
      • 1...Bd8
        • 2.Rxd8#
      • 1...Rf5
        • 2.Re7#
        • 2.Qc6#
        • 2.Qe7#
      • 1...Sf5
        • 2.Qxe6#
      • 1...Sxe8!
  • Keys
    • 1.Bc7!
      • threat
        • 2.Rd8#
      • 1...Rxc7
        • 2.Sb8#
      • 1...Bxc7
        • 2.Sxc5#
      • 1...Sxe8
        • 2.Bxe6#
      • 1...Rf5
        • 2.Qc6#
      • 1...Sf5
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(c);N_PINQ(C),N_SPINS(f)::QAB1(C)
    • R(c);OGATE::P(D),XR(c)
    • B(e);N_GUARD::S(E),XR(c)
    • S(i);N_PINQ(C),N_SPINS(f)::QAB1(C),XS(f)
  • Tries
    • Try
      • R(A);CHECK,N_SPINQ(C),XB(a)
      • Refutation
        • P(b);XR(A)
    • Try
      • Q(C);CHECK,N_SPINQ(C),XB(a)
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAR2(C),XR(c)
      • Refutation
        • P(b);P_SPINP(b),XQ(C)
    • Try
      • P(F);
      • Threat
        • DUALS(3)
      • Vars
        • B(e);N_GUARD::R1(J),XB(e)
        • S(i);N_PINQ(C),N_SPINS(f)::QAB1(C),XS(f)
      • Refutation
        • S(i);XR(J)
  • Actual
    • B(H);
    • Threat
      • R1(J)
    • Vars
      • R(c);SBLOCK,XB(H)::S(E)
      • B(e);N_GUARD,SBLOCK,XB(H)::S(E),XR(c)
      • S(i);N_GUARD,XR(J)::B(B),XS(f)
      • R(c);N_PINQ(C),N_SPINS(f)::QAB1(C)
      • S(i);N_PINQ(C),N_SPINS(f)::QAB1(C),XS(f)
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