MESON Chess Problem Database

Problem Display
PID: 87506 (4bq2/1B2p3/2p4B/8/2Rpk1P1/3NNn2/K3P3/8 w - - 0 1)

Eerkes, Allard Pieter

American Chess Problemist, 1950

4bq2/1B2p3/2p4B/8/2Rpk1P1/3NNn2/K3P3/8

#2

8 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bh5
      • 2.Bxc6#
    • 1...Bg6
      • 2.Bxc6#
    • 1...Se5
      • 2.Sc5#
    • 1...e5
      • 2.Sf2#
  • Keys
    • 1.Rxc6!
      • threat
        • 2.Re6#
      • 1...Bxc6
        • 2.Bxc6#
      • 1...dxe3
        • 2.Rc4#
      • 1...Se5
        • 2.Sc5#
      • 1...e5
        • 2.Sf2#
      • 1...e6
        • 2.Rxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • B(f);N_GUARD::B(H),XP(d)
    • S(a);SBLOCK::S(C)
    • P(e);SBLOCK::S(C)
  • Actual
    • R(E);N_PINP(b),XP(d)
    • Threat
      • B(H)+R(E),DCHECK
    • Vars
      • B(f);OGATE,P_SPINB(f),XR(E)::B(H),XB(f)
      • P(b);XS(D)::B(H)+R(E),DCHECK
      • S(a);SBLOCK::S(C)
      • P(e);SBLOCK::S(C)
      • P(e);::B(H)+R(E),DCHECK,XP(e)
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