MESON Chess Problem Database

Problem Display
PID: 43375 (4R3/3B4/2Rpb2r/K2k2p1/1P2pbQr/1P2P3/7B/8 w - - 0 1)

Stevenson, Edward

Double Pin-Mate after a Black King Move, 1980

4R3/3B4/2Rpb2r/K2k2p1/1P2pbQr/1P2P3/7B/8

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Qxg5#
    • 1...Rh5
      • 2.Qxe6#
    • 1...Rh7
      • 2.Qxe6#
    • 1...Rh8
      • 2.Qxe6#
    • 1...Bxe3
      • 2.Rxd6#
    • 1...Bf5
      • 2.Qd1#
    • 1...Bf7
      • 2.Qd1#
    • 1...Bg8
      • 2.Qd1#
  • Tries
    • 1.Qe2?
      • threat
        • 2.Qb5#
      • 1...Bxe3
        • 2.Rxd6#
        • 2.Qc4#
      • 1...Ke5!
  • Keys
    • 1.Rb6!
      • threat
        • 2.Rb5#
      • 1...Ke5
        • 2.Qxg5#
      • 1...Bxe3
        • 2.Rxd6#
      • 1...Bxd7
        • 2.Qd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • K(d);P-FLIGHT,P_SPINB(b)::QAR2(E),XP(e)
    • R(h);N_GUARD::QAB1(E),XB(g)
    • B(b);N_GUARD,XP(C)::R1(G),XP(f)
    • B(g);::QAR(E)
  • Tries
    • Try
      • Q(E);
      • Threat
        • QAR2(E)
      • Refutation
        • K(d);P-FLIGHT,P_SPINB(b)
  • Actual
    • R(G);
    • Threat
      • R(G)
    • Vars
      • K(d);P-FLIGHT,P_SPINB(b)::QAR2(E),XP(e)
      • B(b);N_GUARD,XP(C)::R1(G),XP(f)
      • B(g);XB(H)::QAR(E)
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