MESON Chess Problem Database

Problem Display
PID: 45366 (K4b2/1pN5/p3P2r/N1kp4/p4BR1/2nbp3/1Q6/3R4 w - - 0 1)

Stevenson, Edward

Double Pin-Mate after a Black King Move, 1980

K4b2/1pN5/p3P2r/N1kp4/p4BR1/2nbp3/1Q6/3R4

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Bd6#
    • 1...Rxe6
      • 2.Sxe6#
  • Tries
    • 1.Bd6+?
      • 1...Bxd6
        • 2.Qb4#
      • 1...Kxd6!
  • Keys
    • 1.Kxb7!
      • threat
        • 2.Qb6#
      • 1...Kd4
        • 2.Bd6#
      • 1...Rxe6
        • 2.Sxe6#
      • 1...Bb5
        • 2.Qa3#
      • 1...Sb5
        • 2.Sxa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(e);P_SPINB(b),P_SPINS(a),S_FLIGHT::R(D)+B(C)
    • R(h);XP(F)::S(G),XR(h)
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • B(j);SBLOCK,XB(C)::QAB1(B)
      • Refutation
        • K(e);S_FLIGHT,XB(C)
  • Actual
    • K(H);S_FLIGHT,XP(i)
    • Threat
      • QAB1(B)
    • Vars
      • K(e);P_SPINB(b),P_SPINS(a),S_FLIGHT::R(D)+B(C)
      • R(h);XP(F)::S(G),XR(h)
      • B(b);::QAB(B)
      • S(a);S_CUTB(b)::S(G),XP(g)
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Developed and maintained by Brian Stephenson.
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