MESON Chess Problem Database

Problem Display
PID: 199591 (4b1qR/R1Npk1Pp/1pP1N2n/6PB/3Q1P2/2K5/8/8 w - - 0 1)

Millins, James Lever

The Problemist, 1982

4b1qR/R1Npk1Pp/1pP1N2n/6PB/3Q1P2/2K5/8/8

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe6
      • 2.Rxe8#
    • 1...Qxg7
      • 2.Rxe8#
    • 1...Qf8
      • 2.gxf8Q#
      • 2.gxf8B#
    • 1...Bxh5
      • 2.Qxd7#
    • 1...Bg6
      • 2.Qxd7#
    • 1...Bf7
      • 2.Qxd7#
    • 1...dxc6
      • 2.Qd8#
    • 1...dxe6
      • 2.Sxe8#
    • 1...d5
      • 2.Qb4#
    • 1...d6
      • 2.Qf6#
  • Tries
    • 1.Sd5+?
      • 1...Kxe6
        • 2.Qe5#
      • 1...Kd6!
    • 1.Rxg8?
      • threat
        • 2.Rxe8#
      • 1...Bxh5
        • 2.Qxd7#
      • 1...Bg6
        • 2.Qxd7#
      • 1...d5
        • 2.Qb4#
      • 1...Bf7
        • 2.Qxd7#
      • 1...Sxg8!
  • Keys
    • 1.Sb5!
      • threat
        • 2.Qf6#
        • 2.Qd6#
      • 1...Kxe6
        • 2.Qe5#
        • 2.Qe4#
      • 1...Qxe6
        • 2.Rxe8#
      • 1...Qxg7
        • 2.Rxe8#
      • 1...Bxh5
        • 2.Qxd7#
      • 1...Bg6
        • 2.Qxd7#
      • 1...Bf7
        • 2.Qxd7#
      • 1...Qf7
        • 2.Qd6#
      • 1...Qf8
        • 2.Qd6#
      • 1...Sg4
        • 2.Qd6#
      • 1...Sf5
        • 2.Qf6#
      • 1...Sf7
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • Q(g);OGATE,XS(G)::R1(K),XB(f)
    • Q(g);OGATE,P_PINQ(B),XP(J)::R1(K),XB(f)
    • Q(g);OGATE::PXQ(g)=Q
    • B(f);N_GUARD,XB(E)::QAR1(B),XP(c)
    • B(f);N_GUARD::QAR1(B),XP(c)
    • P(c);OGATE,XP(F)::QAB1(B)
    • P(c);SBLOCK,XS(G)::R(H)+S(I),XB(f)
    • P(c);N_GUARD::QAB(B)
    • P(c);SBLOCK::QAB1(B)
  • Tries
    • Try
      • S(I);CHECK,P_PINP(c)
      • Vars
        • K(d);N_SPINP(c),P-FLIGHT,XS(G)::QAR1(B)
      • Refutation
        • K(d);N_SPINP(c),S_FLIGHT
    • Try
      • R(K);XQ(g)
      • Threat
        • R1(K),XB(f)
      • Vars
        • B(f);N_GUARD,XB(E)::QAR1(B),XP(c)
        • B(f);N_GUARD::QAR1(B),XP(c)
        • P(c);N_GUARD::QAB(B)
      • Refutation
        • S(b);XR(K)
  • Actual
    • S(I);P_PINP(c)
    • Threat
      • DUALS(2)
    • Vars
      • Q(g);OGATE,SBLOCK,XS(G)::R1(K),XB(f)
      • Q(g);OGATE,P_PINQ(B),XP(J)::R1(K),XB(f)
      • B(f);N_GUARD,XB(E)::QAR1(B),XP(c)
      • B(f);N_GUARD::QAR1(B),XP(c)
      • Q(g);::QAB1(B)
      • S(b);::QAB1(B)
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