MESON Chess Problem Database

Problem Display
PID: 267217 (r4B2/2pB1p2/8/Np1k4/2pp2N1/2pR1K2/Q4P1b/8 w - - 0 1)

Holroyd, GC

The Problemist, 1955

r4B2/2pB1p2/8/Np1k4/2pp2N1/2pR1K2/Q4P1b/8

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Be5
      • 2.Se3#
    • 1...b4
      • 2.Qxc4#
  • Keys
    • 1.Sb3!
      • threat
        • 2.Rxd4#
      • 1...cxb3
        • 2.Qxb3#
      • 1...cxd3
        • 2.Sa5#
      • 1...Be5
        • 2.Se3#
      • 1...c5
        • 2.Qxa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(a);SBLOCK::S(E)
    • P(e);N_GUARD::QAB1(A),XP(c)
  • Actual
    • S(F);N_PINP(c),P_PINP(d)
    • Threat
      • R1(C),XP(d)
    • Vars
      • P(c);N_SPINP(d),OGATE,P_SPINP(c),XS(F)::QAB(A),XP(c)
      • P(c);N_SPINP(d),XR(C)::QAB(A)+S(F)
      • B(a);SBLOCK::S(E)
      • P(g);N_GUARD::QAB(A),XR(i)
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