MESON Chess Problem Database

Problem Display
PID: 45208 (6NQ/4p2b/1K2pr2/4P3/3krN2/5P2/BP3P1B/4R3 w - - 0 1)

Stevenson, Edward

Double Pin-Mate after a Black King Move, 1980

6NQ/4p2b/1K2pr2/4P3/3krN2/5P2/BP3P1B/4R3

#2

11 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf4
      • 2.Rd1#
    • 1...Rf5
      • 2.Rd1#
      • 2.Rxe4#
    • 1...Rg6
      • 2.Rd1#
      • 2.Rxe4#
    • 1...Rh6
      • 2.Rd1#
    • 1...Rf7
      • 2.Rd1#
    • 1...Rf8
      • 2.Rd1#
    • 1...Bxg8
      • 2.Rxe4#
  • Keys
    • 1.Sxe7!
      • threat
        • 2.Sc6#
      • 1...Kxe5
        • 2.Sxe6#
      • 1...Rexf4
        • 2.Qd8#
      • 1...Rfxf4
        • 2.Rd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(d);XS(G)::R(A)
    • R(d);::R(A)
    • B(f);N_GUARD,XS(J)::R1(A),XR(b)
  • Actual
    • S(J);XP(e)
    • Threat
      • S(J)
    • Vars
      • K(a);P_SPINR(b),S_FLIGHT,XP(H)::B(E)+S(G),XP(c)
      • R(b);XS(G)::QAR(K)
      • R(d);XS(G)::R(A)
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