MESON Chess Problem Database

Problem Display
PID: 45560 (K3Q3/8/p2pR1p1/3pn1P1/1Ppk4/r2r4/1P3P2/NB4B1 w - - 0 1)

Stevenson, Edward

Double Pin-Mate after a Black King Move, 1980

K3Q3/8/p2pR1p1/3pn1P1/1Ppk4/r2r4/1P3P2/NB4B1

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sf3
      • 2.Sc2#
    • 1...Sg4
      • 2.Sc2#
    • 1...Sc6
      • 2.Sc2#
    • 1...Sd7
      • 2.Sc2#
    • 1...Sf7
      • 2.Sc2#
  • Keys
    • 1.Qf7!
      • threat
        • 2.Qf4#
      • 1...Ke4
        • 2.f3#
      • 1...Sxf7
        • 2.Sc2#
      • 1...Re3
        • 2.Qa7#
      • 1...Rf3
        • 2.Qa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • S(f);::S(A)
  • Actual
    • Q(J);
    • Threat
      • QAR2(J)
    • Vars
      • K(d);P-FLIGHT,P_SPINR(b),P_SPINS(f)::P(E)
      • S(f);XQ(J)::S(A)
      • R(b);::QAB(J)
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