MESON Chess Problem Database

Problem Display
PID: 139897 (5Bn1/5pRp/3P1k1p/3KpP1n/6Q1/6P1/8/8 w - e5 0 1)

Chapman, CF

The Problemist, 1938

5Bn1/5pRp/3P1k1p/3KpP1n/6Q1/6P1/8/8

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sxg7
      • 2.Bxg7#
    • 1...Se7+
      • 2.Bxe7#
  • Keys
    • 1.fxe5 ep!
      • threat
        • 2.Rxf7#
      • 1...Sf4+
        • 2.Qxf4#
      • 1...Se7+
        • 2.Bxe7#
      • 1...fxe6+
        • 2.Qxe6#
      • 1...Sxg7
        • 2.Bxg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(b);OGATE,XR(F)::B(G),XS(b)
    • S(g);CHECK,N_GUARD::B(G),XS(g)
  • Actual
    • P(D);EP,XP(a)
    • Threat
      • R1(F),XP(e)
    • Vars
      • S(b);CHECK,N_GUARD::QAR2(B),XS(b)
      • S(g);CHECK,N_GUARD::B(G),XS(g)
      • P(e);CHECK,OGATE,XP(D)::QAR1(B),XP(e)
      • S(b);OGATE,XR(F)::B(G),XS(b)
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