MESON Chess Problem Database

Problem Display
PID: 250013 (1R6/Q7/2pPn3/2Np2N1/3k2p1/3P2P1/P1B5/3RBK2 w - - 0 1)

van Atten, Jasper

Schakend Nederland, 1984

1R6/Q7/2pPn3/2Np2N1/3k2p1/3P2P1/P1B5/3RBK2

#2

12 + 5

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Bf2#
  • Tries
    • 1.Sd7+?
      • 1...Sc5
        • 2.Qxc5#
      • 1...c5!
    • 1.Bc3+?
      • 1...Ke3
        • 2.Re1#
      • 1...Kxc3!
    • 1.Rb4+?
      • 1...Ke3
        • 2.Bd2#
        • 2.Bf2#
      • 1...Ke5!
    • 1.Re8?
      • 1...Ke3
        • 2.Bf2#
      • 1...Sxc5
        • 2.Qg7#
      • 1...Sxg5
        • 2.Sb3#
      • 1...Sf4
        • 2.Sb3#
      • 1...Sc7
        • 2.Sb3#
      • 1...Sg7
        • 2.Sb3#
      • 1...Sd8
        • 2.Sb3#
      • 1...Sf8
        • 2.Sb3#
      • 1...Ke5!
    • 1.Qa4+?
      • 1...Ke3
        • 2.Bd2#
        • 2.Bf2#
      • 1...Kxc5
        • 2.Qb4#
      • 1...Ke5!
    • 1.Qg7+?
      • 1...Ke3
        • 2.Bd2#
        • 2.Bf2#
        • 2.Qe5#
      • 1...Kxc5
        • 2.Bb4#
      • 1...Sxg7!
  • Keys
    • 1.Qe7!
      • 1...Ke3
        • 2.Bf2#
      • 1...Kxc5
        • 2.Sxe6#
      • 1...Ke5
        • 2.d4#
      • 1...Sxc5
        • 2.Rb4#
      • 1...Sxg5
        • 2.Sb3#
      • 1...Sf4
        • 2.Sb3#
      • 1...Sc7
        • 2.Sb3#
      • 1...Sg7
        • 2.Sb3#
      • 1...Sd8
        • 2.Sb3#
      • 1...Sf8
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • K(a);N_GUARD,S_FLIGHT::B(B)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAB1(K),XS(e)
      • Refutation
        • P(d);P_SPINP(d)
    • Try
      • B(B);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::R(A)
      • Refutation
        • K(a);S_FLIGHT,XB(B)
    • Try
      • R(L);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(L);
      • Vars
        • K(a);N_GUARD,P_SPINS(e),S_FLIGHT::B(B)
        • S(e);N_GUARD,P_SPINS(e),SBLOCK,XS(H)::QAB(K)
        • S(e);XS(I)::QAB(K)+S(H),DCHECK
        • S(e);::QAB(K)+S(H),DCHECK
      • Refutation
        • K(a);P_SPINS(e),S_FLIGHT
    • Try
      • Q(K);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT,XS(H)::QAB1(K)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(K);CHECK
      • Vars
        • K(a);N_GUARD,S_CUTS(e),S_FLIGHT,XS(H)::B(B)
      • Refutation
        • S(e);XQ(K)
  • Actual
    • Q(K);
    • Vars
      • K(a);N_GUARD,P_SPINS(e),S_FLIGHT::B(B)
      • K(a);N_GUARD,S_FLIGHT,XS(H)::S(I),XS(e)
      • K(a);OGATE,P_SPINS(e),S_FLIGHT::P(F)
      • S(e);SBLOCK,XS(H)::R(L)
      • S(e);XS(I)::S(H)
      • S(e);::S(H)
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