MESON Chess Problem Database

Problem Display
PID: 146649 (6K1/2n5/2P1RP1Q/3kbN2/1P2RP2/1Np5/2P3P1/8 w - - 0 1)

Aloni, Yoel

4th Comm., Israel Ring Ty., 1984

6K1/2n5/2P1RP1Q/3kbN2/1P2RP2/1Np5/2P3P1/8

#2

12 + 4

721 Variantim 1988

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Rxe5#
    • 1...Kxe6
      • 2.Rxe5#
    • 1...Bxf4
      • 2.Se7#
    • 1...Bxf6
      • 2.Se3#
  • Tries
    • 1.Sc5?
      • threat
        • 2.Se3#
        • 2.Se7#
      • 1...Bxf4
        • 2.Se7#
        • 2.Rd4#
      • 1...Bxf6
        • 2.Se3#
        • 2.Rd6#
      • 1...Bd4
        • 2.Rxd4#
      • 1...Bd6
        • 2.Rxd6#
      • 1...Sxe6!
    • 1.Se3+?
      • 1...Kxe4
        • 2.Rxe5#
      • 1...Kxe6!
    • 1.Se7+?
      • 1...Kxe4
        • 2.Rxe5#
      • 1...Kxe6!
    • 1.Rd4+?
      • 1...Kxe6
        • 2.Sg7#
      • 1...Bxd4!
  • Keys
    • 1.Sa5!
      • threat
        • 2.R4xe5#
        • 2.R6xe5#
      • 1...Kxe4
        • 2.Rxe5#
      • 1...Kxe6
        • 2.Rxe5#
      • 1...Bxf4
        • 2.Se7#
      • 1...Bxf6
        • 2.Se3#
      • 1...Sxe6
        • 2.Rxe5#
      • 1...Bd4
        • 2.Se7#
      • 1...Bd6
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);P_SPINB(c),S_FLIGHT,XR(E)::R1(I),XB(c)
    • K(b);P_SPINB(c),S_FLIGHT,XR(I)::R1(E),XB(c)
    • B(c);XP(F)::S(G)
    • B(c);XP(J)::S(G)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • B(c);N_GUARD::R1(E),XB(c)
        • B(c);N_GUARD::R1(I),XB(c)
      • Refutation
        • S(d);XR(I)
    • Try
      • S(G);CHECK
      • Vars
        • K(b);P_SPINB(c),S_FLIGHT,XR(E)::R1(I),XB(c)
      • Refutation
        • K(b);P_SPINB(c),S_FLIGHT,XR(I)
    • Try
      • S(G);CHECK
      • Vars
        • K(b);P_SPINB(c),S_FLIGHT,XR(E)::R1(I),XB(c)
      • Refutation
        • K(b);P_SPINB(c),S_FLIGHT,XR(I)
    • Try
      • R(E);CHECK
      • Vars
        • K(b);S_FLIGHT,XR(I)::S(G)
      • Refutation
        • B(c);XR(E)
  • Actual
    • S(C);
    • Threat
      • DUALS(2)
    • Vars
      • K(b);P_SPINB(c),S_FLIGHT,XR(E)::R1(I),XB(c)
      • K(b);P_SPINB(c),S_FLIGHT,XR(I)::R1(E),XB(c)
      • B(c);XP(F)::S(G)
      • B(c);XP(J)::S(G)
      • S(d);XR(I)::R1(E),XB(c)
      • B(c);::S(G)
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