MESON Chess Problem Database

Problem Display
PID: 245905 (1RB3n1/2p2p2/2k1b3/2pN4/2N1p3/2P2P2/nKQ3p1/8 w - - 0 1)

Hoffmann, Fritz

Europa-Rochade, 1998

1RB3n1/2p2p2/2k1b3/2pN4/2N1p3/2P2P2/nKQ3p1/8

#2

8 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd5
      • 2.Qxe4#
    • 1...Bxd5
      • 2.Qa4#
    • 1...Sf6
      • 2.Se7#
    • 1...Sh6
      • 2.Se7#
    • 1...Se7
      • 2.Sxe7#
  • Tries
    • 1.Rb6+?
      • 1...Kxd5
        • 2.Qxe4#
      • 1...cxb6!
  • Keys
    • 1.Qxe4!
      • threat
        • 2.Sb4#
        • 2.Se7#
      • 1...Bxd5
        • 2.Qe8#
      • 1...Bxc8
        • 2.Sf6#
      • 1...Sb4
        • 2.Sxb4#
        • 2.Se7#
      • 1...Se7
        • 2.Sb4#
        • 2.Sxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • K(e);OGATEB,S_FLIGHT,XS(F)::QAB1(B),XP(c)
    • B(f);SBLOCK,XS(F)::QAB(B)
    • S(i);N_GUARD::S(F)
    • S(i);N_GUARD::S(F),XS(i)
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • K(e);S_FLIGHT,XS(F)::QAB1(B),XP(c)
      • Refutation
        • P(g);XR(G)
  • Actual
    • Q(B);XP(c)
    • Threat
      • DUALS(2)
    • Vars
      • B(f);OGATE,P_SPINB(f),SBLOCK,XS(F)::QAB(B)
      • B(f);N_GUARD,XB(H)::QAB(B)+S(F)
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