MESON Chess Problem Database

Problem Display
PID: 45360 (Q2R2B1/3N4/1pb1rB2/1N1P1R1p/1K2k1P1/8/3P2P1/8 w - - 0 1)

Stevenson, Edward

Double Pin-Mate after a Black King Move, 1980

Q2R2B1/3N4/1pb1rB2/1N1P1R1p/1K2k1P1/8/3P2P1/8

#2

12 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd5
      • 2.Qxd5#
  • Tries
    • 1.Qa1?
      • threat
        • 2.Qd4#
        • 2.Qb1#
      • 1...Bxb5
        • 2.Qd4#
      • 1...hxg4
        • 2.Qb1#
      • 1...Kd3!
  • Keys
    • 1.Rf3!
      • threat
        • 2.Sc3#
      • 1...Kxd5
        • 2.Sc5#
      • 1...Rxf6
        • 2.d3#
      • 1...Bxb5
        • 2.Bh7#
      • 1...Re5
        • 2.d3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(d);OGATE,P_SPINB(d),XP(F)::QAB1(J),XB(d)
  • Tries
    • Try
      • Q(J);
      • Threat
        • DUALS(2)
      • Vars
        • B(d);XS(E)::QAR1(J)
        • P(b);XP(D)::QAB(J)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • R(G);
    • Threat
      • S(E)
    • Vars
      • K(a);P_SPINB(d),P_SPINR(e),S_FLIGHT,XP(F)::R(K)+S(I)
      • R(e);XB(H)::P(A)
      • B(d);XS(E)::B(L)
      • R(e);::P(A)
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