MESON Chess Problem Database

Problem Display
PID: 45351 (B7/1n1rn3/2Pb3R/3k3N/8/1P1PQ3/8/7K w - - 0 1)

Stevenson, Edward

Double Pin-Mate after a Black King Move, 1980

B7/1n1rn3/2Pb3R/3k3N/8/1P1PQ3/8/7K

#2

8 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Ba3
      • 2.Sf4#
    • 1...Bb4
      • 2.Sf4#
    • 1...Bf4
      • 2.Sxf4#
    • 1...Bc5
      • 2.Sf4#
      • 2.Qe4#
    • 1...Sa5
      • 2.Sf6#
    • 1...Sc5
      • 2.Sf6#
    • 1...Sd8
      • 2.Sf6#
    • 1...Sxc6
      • 2.Sf6#
  • Keys
    • 1.b4!
      • threat
        • 2.Qe4#
      • 1...Kxc6
        • 2.Qc5#
      • 1...Bxb4
        • 2.Sf4#
      • 1...Sc5
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • B(b);N_GUARD::S(E)
    • B(b);N_GUARD::S(E),XB(b)
    • S(c);::S(E)
    • S(e);SBLOCK,XP(F)::S(E)
  • Actual
    • P(B);
    • Threat
      • QAB1(D)
    • Vars
      • K(a);P_SPINB(b),P_SPINS(c),S_FLIGHT,XP(F)::QAR1(D)
      • B(b);N_GUARD,XP(B)::S(E)
      • S(c);::S(E)
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Developed and maintained by Brian Stephenson.
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