MESON Chess Problem Database

Problem Display
PID: 268559 (qn3R2/r2p4/r4N1K/pB1p1kP1/2p3p1/6P1/3P4/4R3 w - - 0 1)

Ahs, Carl Johan Mathias

British Chess Magazine, 1934

qn3R2/r2p4/r4N1K/pB1p1kP1/2p3p1/6P1/3P4/4R3

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf6+
      • 2.Rxf6#
    • 1...Sc6
      • 2.Se8#
    • 1...c3
      • 2.Bd3#
    • 1...d6
      • 2.Sd7#
  • Keys
    • 1.d4!
      • threat
        • 2.Re5#
      • 1...Rxf6+
        • 2.Rxf6#
      • 1...cxd4 ep
        • 2.Bxd3#
      • 1...Re6
        • 2.Rf1#
      • 1...Sc6
        • 2.Se8#
      • 1...d6
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(f);CHECK,OGATE,P_SPINR(f),XS(F)::R1(H),XR(f)
    • S(j);N_PINS(F)::R(H)+S(F)
    • P(a);OGATE::B(D)
    • P(h);N_PINS(F)::R(H)+S(F)
  • Actual
    • P(B);
    • Threat
      • R1(A)
    • Vars
      • R(f);CHECK,OGATE,P_SPINR(f),XS(F)::R1(H),XR(f)
      • P(a);EP,OGATE,XP(B)::B(D),XP(a)
      • R(f);SBLOCK::R(A)
      • S(j);N_PINS(F)::R(H)+S(F)
      • P(h);N_PINS(F)::R(H)+S(F)
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