MESON Chess Problem Database

Problem Display
PID: 45217 (BbRn1N2/7p/2r2p1R/1N2k2K/1P2r2p/pPP2Q2/1B3n2/8 w - - 0 1)

Stevenson, Edward

Double Pin-Mate after a Black King Move, 1980

BbRn1N2/7p/2r2p1R/1N2k2K/1P2r2p/pPP2Q2/1B3n2/8

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.c4#
    • 1...Rd4
      • 2.cxd4#
    • 1...Rxc3
      • 2.Rc5#
      • 2.Qxf6#
    • 1...Rc4
      • 2.Qxf6#
    • 1...Rc5
      • 2.Rxc5#
      • 2.Qxf6#
    • 1...Ra6
      • 2.Rc5#
    • 1...Rb6
      • 2.Rc5#
    • 1...Re6
      • 2.Sd7#
      • 2.Rc5#
    • 1...Rc7
      • 2.Qxf6#
    • 1...Rxc8
      • 2.Qxf6#
  • Tries
    • 1.Bxc6?
      • threat
        • 2.Qxf6#
      • 1...Rf4
        • 2.Qd5#
      • 1...Sg4
        • 2.Qxe4#
      • 1...f5
        • 2.Sd7#
      • 1...Sxc6!
    • 1.c4+?
      • 1...Rd4
        • 2.Bxd4#
      • 1...axb2!
  • Keys
    • 1.Rxf6!
      • threat
        • 2.Rf5#
        • 2.Qf5#
      • 1...Kd5
        • 2.c4#
      • 1...Rxf6
        • 2.Rc5#
      • 1...Rf4
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • K(e);P-FLIGHT,P_SPINR(c)::P(C)
    • R(c);OGATE::P(C),XR(c)
    • R(f);N_GUARD::QAB1(D),XP(g)
    • R(f);OGATE::R(J)
    • R(f);N_GUARD,XR(J)::QAB1(D),XP(g)
  • Tries
    • Try
      • B(I);XR(f)
      • Threat
        • QAB1(D),XP(g)
      • Vars
        • R(c);OGATE,SBLOCK::QAR1(D)
        • S(a);N_GUARD::QAR1(D),XR(c)
        • P(g);::S(K)
      • Refutation
        • S(j);XB(I)
    • Try
      • P(C);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::B(A),XR(c)
      • Refutation
        • P(b);XB(A)
  • Actual
    • R(H);XP(g)
    • Threat
      • DUALS(2)
    • Vars
      • K(e);P-FLIGHT,P_SPINR(c)::P(C)
      • R(f);OGATE,XR(H)::R(J)
      • R(c);::S(K)
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Developed and maintained by Brian Stephenson.
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