MESON Chess Problem Database

Problem Display
PID: 191964 (7Q/4R2p/5PpK/n3P2n/rRrN1kP1/p2P4/5PP1/3B4 w - - 0 1)

Cheylan, Yves

Sachsische Zeitung, 2001

(First published on Sat Mar 3 2001)

7Q/4R2p/5PpK/n3P2n/rRrN1kP1/p2P4/5PP1/3B4

#2

12 + 8

16210 Problemschach-Jahrbuch (2001) 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Se2#
    • 1...Rc2
      • 2.Se2#
    • 1...Rc3
      • 2.Se2#
    • 1...Rc5
      • 2.Se2#
    • 1...Rc6
      • 2.Se2#
    • 1...Rc7
      • 2.Se2#
    • 1...Rc8
      • 2.Se2#
    • 1...Sxf6
      • 2.Qxf6#
      • 2.g3#
    • 1...Sg7
      • 2.g3#
  • Tries
    • 1.Qc8?
      • threat
        • 2.Se2#
      • 1...Rxd4
        • 2.Qc1#
      • 1...Sg3!
    • 1.f7?
      • threat
        • 2.Se6#
      • 1...Sf6
        • 2.Qxf6#
        • 2.g3#
      • 1...Sg7
        • 2.g3#
      • 1...Rxd4!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Se6#
      • 1...Rxd4
        • 2.e6#
      • 1...Rc7
        • 2.Se2#
      • 1...Sg7
        • 2.g3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • R(c);::R(E)+S(F),DCHECK
    • S(f);N_GUARD::P(C)
  • Tries
    • Try
      • Q(L);
      • Threat
        • S(F)
      • Vars
        • R(c);OGATE,P_SPINR(c),XS(F)::QAB(L)
      • Refutation
        • S(f);
    • Try
      • P(I);
      • Threat
        • S(F)
      • Vars
        • S(f);N_GUARD::P(C)
      • Refutation
        • R(c);P_SPINR(c),XS(F)
  • Actual
    • Q(L);
    • Threat
      • S(F)
    • Vars
      • R(c);N_GUARD,P_SPINR(c),XS(F)::QAB(L)+P(H)
      • R(c);::R(E)+S(F),DCHECK
      • S(f);N_GUARD::P(C)
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