MESON Chess Problem Database

Problem Display
PID: 43369 (3R4/2p2p2/2nb3Q/1RNPPP2/2bkpp2/3N4/B2P1n1K/6B1 w - - 0 1)

Stevenson, Edward

Double Pin-Mate after a Black King Move, 1980

3R4/2p2p2/2nb3Q/1RNPPP2/2bkpp2/3N4/B2P1n1K/6B1

#2

12 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd5
      • 2.Se6#
  • Tries
    • 1.Bxf2+?
      • 1...Kxd5
        • 2.Sa4#
        • 2.Sa6#
        • 2.Se6#
        • 2.Sb7#
      • 1...e3!
  • Keys
    • 1.Qxf4!
      • threat
        • 2.Qxe4#
      • 1...Kxd5
        • 2.Se6#
      • 1...Bxd3
        • 2.Bxf2#
      • 1...Bxd5
        • 2.Bxf2#
        • 2.Qe3#
      • 1...Bxc5
        • 2.Qe3#
      • 1...Bxe5
        • 2.Bxf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(c);N_SPINS(a),P-FLIGHT,P_SPINB(b),XP(H)::R(F)+S(G)
  • Tries
    • Try
      • B(A);CHECK,XS(a)
      • Refutation
        • P(d);P_SPINP(d)
  • Actual
    • Q(K);P_PINP(d),XP(e)
    • Threat
      • QAR1(K),XP(d)
    • Vars
      • K(c);N_SPINP(d),N_SPINS(a),P-FLIGHT,P_SPINB(b),XP(H)::R(F)+S(G)
      • B(b);XS(E)::B(A),XS(a)
      • B(g);XS(G)::QAB1(K)
      • B(g);P_PINQ(K),XP(I)::B(A),XS(a)
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